Loadbalancing von Barracuda's Web Gateway - das Handbuch
Dieser Guide beschreibt die Konfiguration eines Loadbalancers für Barracuda's Web Gateway bzw Webfilter. Enthalten sind empfohlene Deployment Szenarios und Konfigurationsdetails.
Die Vorteile:
- keine Unterbrechung wenn ein Web Filter ausfällt
- für Wartungsarbeiten können Web Filter einfach ausgetauscht werden
- für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
Dieser Guide beschreibt die Konfiguration eines Loadbalancers in Verbindung mit McAfee's Web Filter Produktpalette. Enthalten sind empfohlene Deployment Szenarios und Konfigurationsdetails.
Die Vorteile der Verwendung eines Loadbalancers mit dem McAfee -Webfilter bzw. -Contentfilter:
Da sicherer, zuverlässiger und verfügbarer Internet Zugang essentiell und nicht nur einen Luxus darstellt, müssen Massnahmen ergriffen werden um 100% Uptime zu gewährleisten. Loadbalancer.org Appliances bieten Ihnen die perfekte Lösung dafür, indem sie das Deployment von mehreren Content Filter Devices in einem lastverteilten Hochverfügbarkeits Cluster ermöglichen.
Die Vorteile beinhalten:
• Hochverfügbarkeit / High-Availability / HA – Keine Service Unterbrechung wenn ein Web Filter versagt
• Maintenance – für Wartungsarbeiten können Web Filter einfach aus dem Cluster herausgenommen werden
• Performance – für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
Loadbalancer Konfigurations Optionen:
Die folgenden Sektionen beschreiben die verschiedenen Load Balancer Konfigurationsmehoden, welche beim Lastverteilen von Web Filtern möglich sind (und auch Sinn machen)....
The document discusses load balancing and intelligent load balancing. It covers load balancing architecture, how the data collector and dynamic store work, and how performance counters are used. Intelligent load balancing techniques like load throttling are explained. Potential issues that could cause load imbalances like the "black hole effect" or failing to read performance counters are also reviewed. Troubleshooting techniques for resolving common problems are provided.
The document discusses load balancing techniques used to distribute workloads across multiple servers or resources. It begins with an introduction to load balancing and its benefits, such as increased capacity and continued service during failures. It then describes three main methods for load balancing in Linux: virtual server via NAT (VS/NAT), virtual server via tunneling (VS/TUN), and virtual server via direct routing (VS/DR). Each method forwards requests to servers differently while maintaining a single virtual IP address for clients. VS/NAT rewrites packets, VS/TUN uses encapsulation, and VS/DR directly routes packets on a shared LAN. The document provides examples and compares the advantages and disadvantages of each approach.
This document discusses load balancing techniques used by high-traffic websites like Yahoo to distribute server loads and improve performance. It explains that load balancing involves distributing network traffic, processing, and other loads across multiple servers to prevent any single server from being overwhelmed. Common load balancing methods mentioned are round robin DNS, hardware load balancing using network gateways, and software load balancing using integrated components in web and application servers.
IRJET- An Improved Weighted Least Connection Scheduling Algorithm for Loa...IRJET Journal
This document proposes an improved weighted least connection (IWLC) scheduling algorithm to balance load among web servers in a cluster system. It aims to prevent overloading newly added servers by not assigning requests to a new server more than a maximum number of times (C) consecutively. If a new server receives more than C requests consecutively, it is deactivated and excluded from scheduling for C-1 rounds. Then it is reactivated and included in the scheduling list. The algorithm balances load by avoiding overloads on new servers. The performance of the IWLC algorithm is evaluated through a simulation using Docker containers to create virtual web servers handling simultaneous client requests sent via Node.js. Results show the proposed algorithm more evenly distributes
Server load balancing (SLB) distributes network traffic across multiple servers to optimize resource utilization and maximize throughput. It intercepts traffic destined for a website and redirects requests to various backend servers using techniques like network address translation. SLB aims to improve performance, increase scalability, and maintain high availability by monitoring servers and routing traffic around failures to keep applications running if servers go down. Both hardware and software-based solutions exist, with hardware providing higher performance but at greater cost than software-based options.
Dmv's & Performance Monitor in SQL ServerZeba Ansari
Dynamic management views and functions in SQL Server provide information to monitor server health, diagnose issues, and tune performance. There are server-scoped and database-scoped DMVs. Common DMV categories include database, execution, I/O, index, and operating system. The Performance Monitor tool in Windows collects counters related to physical disk, memory, CPU, and network usage to identify bottlenecks. High disk queue lengths, low available memory, or high processor utilization could indicate performance issues.
Policy based cluster management in oracle 12c Anju Garg
Oracle Grid Infrastructure 12c enhances the use of server pools by introducing server attributes e.g. memory, CPU_count etc. which can be associated with each server. Server pools can be configured so that their members belong to a category of servers, which share a particular set of attributes. Moreover, administrators can maintain a library of policies and switch between them as required rather than manually reallocating servers to various server pools based on workload. This paper discusses in detail the new features of policy based cluster management in 12c.
Dieser Guide beschreibt die Konfiguration eines Loadbalancers in Verbindung mit McAfee's Web Filter Produktpalette. Enthalten sind empfohlene Deployment Szenarios und Konfigurationsdetails.
Die Vorteile der Verwendung eines Loadbalancers mit dem McAfee -Webfilter bzw. -Contentfilter:
Da sicherer, zuverlässiger und verfügbarer Internet Zugang essentiell und nicht nur einen Luxus darstellt, müssen Massnahmen ergriffen werden um 100% Uptime zu gewährleisten. Loadbalancer.org Appliances bieten Ihnen die perfekte Lösung dafür, indem sie das Deployment von mehreren Content Filter Devices in einem lastverteilten Hochverfügbarkeits Cluster ermöglichen.
Die Vorteile beinhalten:
• Hochverfügbarkeit / High-Availability / HA – Keine Service Unterbrechung wenn ein Web Filter versagt
• Maintenance – für Wartungsarbeiten können Web Filter einfach aus dem Cluster herausgenommen werden
• Performance – für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
Loadbalancer Konfigurations Optionen:
Die folgenden Sektionen beschreiben die verschiedenen Load Balancer Konfigurationsmehoden, welche beim Lastverteilen von Web Filtern möglich sind (und auch Sinn machen)....
The document discusses load balancing and intelligent load balancing. It covers load balancing architecture, how the data collector and dynamic store work, and how performance counters are used. Intelligent load balancing techniques like load throttling are explained. Potential issues that could cause load imbalances like the "black hole effect" or failing to read performance counters are also reviewed. Troubleshooting techniques for resolving common problems are provided.
The document discusses load balancing techniques used to distribute workloads across multiple servers or resources. It begins with an introduction to load balancing and its benefits, such as increased capacity and continued service during failures. It then describes three main methods for load balancing in Linux: virtual server via NAT (VS/NAT), virtual server via tunneling (VS/TUN), and virtual server via direct routing (VS/DR). Each method forwards requests to servers differently while maintaining a single virtual IP address for clients. VS/NAT rewrites packets, VS/TUN uses encapsulation, and VS/DR directly routes packets on a shared LAN. The document provides examples and compares the advantages and disadvantages of each approach.
This document discusses load balancing techniques used by high-traffic websites like Yahoo to distribute server loads and improve performance. It explains that load balancing involves distributing network traffic, processing, and other loads across multiple servers to prevent any single server from being overwhelmed. Common load balancing methods mentioned are round robin DNS, hardware load balancing using network gateways, and software load balancing using integrated components in web and application servers.
IRJET- An Improved Weighted Least Connection Scheduling Algorithm for Loa...IRJET Journal
This document proposes an improved weighted least connection (IWLC) scheduling algorithm to balance load among web servers in a cluster system. It aims to prevent overloading newly added servers by not assigning requests to a new server more than a maximum number of times (C) consecutively. If a new server receives more than C requests consecutively, it is deactivated and excluded from scheduling for C-1 rounds. Then it is reactivated and included in the scheduling list. The algorithm balances load by avoiding overloads on new servers. The performance of the IWLC algorithm is evaluated through a simulation using Docker containers to create virtual web servers handling simultaneous client requests sent via Node.js. Results show the proposed algorithm more evenly distributes
Server load balancing (SLB) distributes network traffic across multiple servers to optimize resource utilization and maximize throughput. It intercepts traffic destined for a website and redirects requests to various backend servers using techniques like network address translation. SLB aims to improve performance, increase scalability, and maintain high availability by monitoring servers and routing traffic around failures to keep applications running if servers go down. Both hardware and software-based solutions exist, with hardware providing higher performance but at greater cost than software-based options.
Dmv's & Performance Monitor in SQL ServerZeba Ansari
Dynamic management views and functions in SQL Server provide information to monitor server health, diagnose issues, and tune performance. There are server-scoped and database-scoped DMVs. Common DMV categories include database, execution, I/O, index, and operating system. The Performance Monitor tool in Windows collects counters related to physical disk, memory, CPU, and network usage to identify bottlenecks. High disk queue lengths, low available memory, or high processor utilization could indicate performance issues.
Policy based cluster management in oracle 12c Anju Garg
Oracle Grid Infrastructure 12c enhances the use of server pools by introducing server attributes e.g. memory, CPU_count etc. which can be associated with each server. Server pools can be configured so that their members belong to a category of servers, which share a particular set of attributes. Moreover, administrators can maintain a library of policies and switch between them as required rather than manually reallocating servers to various server pools based on workload. This paper discusses in detail the new features of policy based cluster management in 12c.
This document provides guidance on optimizing performance for proxy servers. It discusses establishing baseline performance metrics, developing a monitoring plan, identifying bottlenecks, and techniques for optimization including caching, proxy arrays, load balancing, and clustering. The document also covers monitoring server components, disk strategies, configuring caching options, and using logs to analyze performance and usage.
This document discusses parameters for tuning the performance of WebLogic servers. It covers OS-level TCP parameters, JVM heap size and GC logging parameters, WebLogic server-level parameters like work managers, execute queues, and stuck threads, and JDBC and JMS pool parameters. It also provides an overview of different types of garbage collection in the HotSpot JVM.
This document discusses integrated services and differentiated services for providing quality of service (QoS) in IP networks. It introduces integrated services architecture (ISA) which allows applications to reserve resources. ISA uses RSVP for signaling and implements services like guaranteed service and controlled load service using queue management techniques like weighted fair queueing. Differentiated services provides QoS by classifying traffic into aggregates based on DS field values and applying different per-hop behaviors like assured forwarding and expedited forwarding. Interior routers apply simple queuing rules based on DS values while boundary routers do traffic conditioning functions like classification, metering, marking and shaping.
This document discusses integrated services and differentiated services for providing quality of service (QoS) on the internet. Integrated services uses resource reservation and traffic classification to provide guaranteed, controlled load, and best effort services. It requires per-flow state maintenance in routers. Differentiated services provides a simpler approach using traffic conditioning and per-hop behavior based on DS codepoints, without per-flow state. It aggregates traffic into behavior aggregates for forwarding.
slides are about load balancing as a concept and implementation of load balancing on computer technical level
slides show the server load balancing
different architectures , algorithms and examples
Presentation on Apache Apex, the enterprise-grade big data analytics platform and how it is used in production use cases. In this talk you will learn about:
• Architecture highlights: high throughput, low-latency, operability with stateful fault tolerance, strong processing guarantees, auto-scaling etc
• Application development model, unified approach for real-time and batch use cases
• Tools for ease of use, ease of operability and ease of management
• How customers use Apache Apex in production
Speakers:
Pramod Immaneni is Apache Apex (incubating) PPMC member, committer and senior architect at DataTorrent Inc, where he works on Apex and specializes in big data applications. Prior to DataTorrent he was a co-founder and CTO of Leaf Networks LLC, eventually acquired by Netgear Inc, where he built products in core networking space and was granted patents in peer-to-peer VPNs. Prior to that he was a technical co-founder of a mobile startup where he was an architect of a dynamic content rendering engine for mobile devices.
MariaDB MaxScale is a database proxy that provides scalability, high availability, and data streaming capabilities for MariaDB and MySQL databases. It acts as a load balancer and router to distribute queries across database servers. MaxScale supports services like read/write splitting, query caching, and security features like selective data masking. It can monitor replication lag and route queries accordingly. MaxScale uses a plugin architecture and its core remains stateless to provide flexibility and high performance.
Clustering technologies in Windows Server 2003 help achieve high availability and scalability for critical applications. Server clusters provide high availability by redistributing workloads from failed servers, while Network Load Balancing provides scalability and availability for web services by load balancing requests across multiple servers. The choice depends on whether applications have long-running in-memory state, with server clusters intended for stateful applications like databases and NLB for stateless applications like web servers.
Traffic characterization parameters like bandwidth, delay, and jitter requirements are used to specify network traffic flows. Traffic shaping techniques like leaky bucket and token bucket regulate traffic into defined patterns to facilitate admission control and traffic policing. The leaky bucket traffic shaper uses a finite bucket that leaks data out at a constant rate to shape traffic bursts according to the bucket size and leak rate. Queue scheduling disciplines like weighted fair queueing determine which packet is served next to affect packet delay, bandwidth, and jitter. Resource reservation protocols negotiate quality of service guarantees by reserving required network resources.
Comparing high availability solutions with percona xtradb cluster and percona...Marco Tusa
Percona XtraDB Cluster (PXC) is currently the most popular solution for HA in the MySQL ecosystem, and any solutions Galera-based as PXC have been the only viable option when looking for a high grade of HA using synchronous replication.
But Oracle had intensively worked on making Group Replication more solid and easy to use.
It is time to identify if Group Replication and attached solutions, like InnoDB cluster, can compete or even replace solutions based on Galera.
This presentation will focus on comparing the two solutions and how they behave when serving basic HA problems.
Attendees will be able to get a clearer understanding of which solutions will serve them better, and in which cases.
Virtualization in 4-4 1-4 Data Center Network.Ankita Mahajan
4-4 1-4 delivers great performance guarantees in traditional (non-virtualized) setting, due to location based static IP address allocation to all network elements.
Download this ppt first and then open in powerpoint to view without merged figures and with animations.
RACAttack 12c Advanced Lab: Server Pools and Policy-managed databasesLudovico Caldara
RACAttack 12c pre-conference workshop at IOUG Collaborate 14 will have a few advanced labs for people already confident with a simple RAC installation. This advanced lab handbook introduces server pools and policy managed databases to your Oracle RAC 12c implementation!
Best Practice for Achieving High Availability in MariaDBMariaDB plc
This document discusses high availability and MariaDB replication. It defines high availability and outlines key components like data redundancy, failover solutions, and monitoring. It then describes MariaDB replication in detail, covering asynchronous and semi-synchronous replication as well as Galera cluster synchronous replication. MaxScale is introduced as a tool for load balancing, monitoring, and facilitating failovers in MariaDB replication topologies.
The document discusses vCloud Air and how it can host business-critical MySQL databases. It provides an overview of vCloud Air and how to set up MySQL instances within it. While vCloud Air provides basic availability and scalability, VMware Continuent adds high availability, disaster recovery, and replication capabilities to MySQL databases running in vCloud Air. It also discusses using Continuent to implement cross-region clusters spanning vCloud Air and on-premises data centers.
Exchange Server 2013 : les mécanismes de haute disponibilité et la redondance...Microsoft Technet France
La nouvelle version d'Exchange Server 2013 intègre une foule de nouveautés lui permettant d'être aujourd'hui le serveur de messagerie le plus sécurisé et le plus fiable sur le marché. L'expérience acquise par la gestion des solutions de messagerie Cloud par les équipes Microsoft a été directement intégrée dans cette nouvelle version du produit ce qui va vous permettre la mise en place d'un système de messagerie ultra résilient. Scott Schnoll, Principal Technical Writer dans l'équipe Exchange à Microsoft Corp va vous expliquer de manière didactique l'ensemble des mécanismes de haute disponibilité et les solutions de resilience inter sites dans les plus petits détails. Venez apprendre directement par l'expert qui a travaillé sur ces sujets chez Microsoft ! Attention, session très technique, en anglais.
Oracle RAC 12c and Policy-Managed Databases, a Technical OverviewLudovico Caldara
Oracle RAC Policy-Managed Database (PMD) is a powerful but so far rarely used feature introduced in Oracle Database 11g
Release 2 to automate the instance administration in a dynamic, multi-node cluster.
The aim of this presentation is to review how PMD works, how to implement and administer it successfully, and how to
benefit from this technology compared to the traditional administrator-managed deployment. During the session, the new
features of the 12c Grid Infrastructure related to PMD are highlighted.
Henry Robinson works at Cloudera on distributed data collection tools like Flume and ZooKeeper. Cloudera provides support for Hadoop and open source projects like Flume. Flume is a scalable and configurable system for collecting large amounts of log and event data into Hadoop from diverse sources. It allows defining flexible data flows that can reliably move data between collection agents and storage systems.
Exchange 2013 Haute disponibilité et tolérance aux sinistres (Session 1/2 pre...Microsoft Technet France
Attention, Session en Anglais. Attention Session en 2 parties. Ceci est la première partie. Cette session sera animée par Scott Schnoll, Senior Content Developer chez Microsoft Corp et veritable Gourou Exchange. La messagerie est un élément ultra critique du système d'information : Elle ne DOIT PAS tomber. Pour cela, Exchange 2013 intègre les toutes dernières technologies en terme de tolérance de panne et de haute disponibilité. Scott Schnoll vous expliquera la mécanique de l'intérieur ! Cette session vous donne accès à l'état de l'art sur Exchange. C'est LA session à suivre pour découvrir la mécanique de haute disponibilité d'Exchange 2013.
Speaker : Scott Schnoll (Microsoft)
Now that you've seen Base 1.0, what's ahead in HBase 2.0, and beyond—and why? Find out from this panel of people who have designed and/or are working on 2.0 features.
This document provides an overview of the transport layer and transport layer protocols. It begins with an introduction to the transport layer, describing its location and functions such as providing process-to-process communication between hosts using logical connections. It then discusses transport layer services including addressing with port numbers, encapsulation/decapsulation, multiplexing/demultiplexing, flow control, error control, congestion control. Finally it describes some common transport layer protocols like UDP, TCP and their mechanisms.
Load Balancer Deployment Guide für Smoothwall Web Filter
Die Vorteile der Verwendung eines Loadbalancers mit dem Web Filter bzw. Web Proxy von Smoothwall:
Da sicherer, zuverlässiger und verfügbarer Internet Zugang essentiell und nicht nur einen Luxus darstellt, müssen Massnahmen ergriffen werden um 100% Uptime zu gewährleisten. Loadbalancer.org Appliances bieten Ihnen die perfekte Lösung dafür, indem sie das Deployment von mehreren Content Filter Devices in einem lastverteilten Hochverfügbarkeits Cluster ermöglichen.
Die Vorteile beinhalten:
• Hochverfügbarkeit / High-Availability / HA – Keine Service Unterbrechung wenn ein Web Filter versagt
• Maintenance – für Wartungsarbeiten können Web Filter einfach aus dem Cluster herausgenommen werden
• Performance – für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
Load Balancer Deployment Guide für Smoothwall Web Filter
Die Vorteile der Verwendung eines Loadbalancers mit dem Web Filter bzw. Web Proxy von Smoothwall:
Da sicherer, zuverlässiger und verfügbarer Internet Zugang essentiell und nicht nur einen Luxus darstellt, müssen Massnahmen ergriffen werden um 100% Uptime zu gewährleisten. Loadbalancer.org Appliances bieten Ihnen die perfekte Lösung dafür, indem sie das Deployment von mehreren Content Filter Devices in einem lastverteilten Hochverfügbarkeits Cluster ermöglichen.
Die Vorteile beinhalten:
• Hochverfügbarkeit / High-Availability / HA – Keine Service Unterbrechung wenn ein Web Filter versagt
• Maintenance – für Wartungsarbeiten können Web Filter einfach aus dem Cluster herausgenommen werden
• Performance – für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
This document provides guidance on optimizing performance for proxy servers. It discusses establishing baseline performance metrics, developing a monitoring plan, identifying bottlenecks, and techniques for optimization including caching, proxy arrays, load balancing, and clustering. The document also covers monitoring server components, disk strategies, configuring caching options, and using logs to analyze performance and usage.
This document discusses parameters for tuning the performance of WebLogic servers. It covers OS-level TCP parameters, JVM heap size and GC logging parameters, WebLogic server-level parameters like work managers, execute queues, and stuck threads, and JDBC and JMS pool parameters. It also provides an overview of different types of garbage collection in the HotSpot JVM.
This document discusses integrated services and differentiated services for providing quality of service (QoS) in IP networks. It introduces integrated services architecture (ISA) which allows applications to reserve resources. ISA uses RSVP for signaling and implements services like guaranteed service and controlled load service using queue management techniques like weighted fair queueing. Differentiated services provides QoS by classifying traffic into aggregates based on DS field values and applying different per-hop behaviors like assured forwarding and expedited forwarding. Interior routers apply simple queuing rules based on DS values while boundary routers do traffic conditioning functions like classification, metering, marking and shaping.
This document discusses integrated services and differentiated services for providing quality of service (QoS) on the internet. Integrated services uses resource reservation and traffic classification to provide guaranteed, controlled load, and best effort services. It requires per-flow state maintenance in routers. Differentiated services provides a simpler approach using traffic conditioning and per-hop behavior based on DS codepoints, without per-flow state. It aggregates traffic into behavior aggregates for forwarding.
slides are about load balancing as a concept and implementation of load balancing on computer technical level
slides show the server load balancing
different architectures , algorithms and examples
Presentation on Apache Apex, the enterprise-grade big data analytics platform and how it is used in production use cases. In this talk you will learn about:
• Architecture highlights: high throughput, low-latency, operability with stateful fault tolerance, strong processing guarantees, auto-scaling etc
• Application development model, unified approach for real-time and batch use cases
• Tools for ease of use, ease of operability and ease of management
• How customers use Apache Apex in production
Speakers:
Pramod Immaneni is Apache Apex (incubating) PPMC member, committer and senior architect at DataTorrent Inc, where he works on Apex and specializes in big data applications. Prior to DataTorrent he was a co-founder and CTO of Leaf Networks LLC, eventually acquired by Netgear Inc, where he built products in core networking space and was granted patents in peer-to-peer VPNs. Prior to that he was a technical co-founder of a mobile startup where he was an architect of a dynamic content rendering engine for mobile devices.
MariaDB MaxScale is a database proxy that provides scalability, high availability, and data streaming capabilities for MariaDB and MySQL databases. It acts as a load balancer and router to distribute queries across database servers. MaxScale supports services like read/write splitting, query caching, and security features like selective data masking. It can monitor replication lag and route queries accordingly. MaxScale uses a plugin architecture and its core remains stateless to provide flexibility and high performance.
Clustering technologies in Windows Server 2003 help achieve high availability and scalability for critical applications. Server clusters provide high availability by redistributing workloads from failed servers, while Network Load Balancing provides scalability and availability for web services by load balancing requests across multiple servers. The choice depends on whether applications have long-running in-memory state, with server clusters intended for stateful applications like databases and NLB for stateless applications like web servers.
Traffic characterization parameters like bandwidth, delay, and jitter requirements are used to specify network traffic flows. Traffic shaping techniques like leaky bucket and token bucket regulate traffic into defined patterns to facilitate admission control and traffic policing. The leaky bucket traffic shaper uses a finite bucket that leaks data out at a constant rate to shape traffic bursts according to the bucket size and leak rate. Queue scheduling disciplines like weighted fair queueing determine which packet is served next to affect packet delay, bandwidth, and jitter. Resource reservation protocols negotiate quality of service guarantees by reserving required network resources.
Comparing high availability solutions with percona xtradb cluster and percona...Marco Tusa
Percona XtraDB Cluster (PXC) is currently the most popular solution for HA in the MySQL ecosystem, and any solutions Galera-based as PXC have been the only viable option when looking for a high grade of HA using synchronous replication.
But Oracle had intensively worked on making Group Replication more solid and easy to use.
It is time to identify if Group Replication and attached solutions, like InnoDB cluster, can compete or even replace solutions based on Galera.
This presentation will focus on comparing the two solutions and how they behave when serving basic HA problems.
Attendees will be able to get a clearer understanding of which solutions will serve them better, and in which cases.
Virtualization in 4-4 1-4 Data Center Network.Ankita Mahajan
4-4 1-4 delivers great performance guarantees in traditional (non-virtualized) setting, due to location based static IP address allocation to all network elements.
Download this ppt first and then open in powerpoint to view without merged figures and with animations.
RACAttack 12c Advanced Lab: Server Pools and Policy-managed databasesLudovico Caldara
RACAttack 12c pre-conference workshop at IOUG Collaborate 14 will have a few advanced labs for people already confident with a simple RAC installation. This advanced lab handbook introduces server pools and policy managed databases to your Oracle RAC 12c implementation!
Best Practice for Achieving High Availability in MariaDBMariaDB plc
This document discusses high availability and MariaDB replication. It defines high availability and outlines key components like data redundancy, failover solutions, and monitoring. It then describes MariaDB replication in detail, covering asynchronous and semi-synchronous replication as well as Galera cluster synchronous replication. MaxScale is introduced as a tool for load balancing, monitoring, and facilitating failovers in MariaDB replication topologies.
The document discusses vCloud Air and how it can host business-critical MySQL databases. It provides an overview of vCloud Air and how to set up MySQL instances within it. While vCloud Air provides basic availability and scalability, VMware Continuent adds high availability, disaster recovery, and replication capabilities to MySQL databases running in vCloud Air. It also discusses using Continuent to implement cross-region clusters spanning vCloud Air and on-premises data centers.
Exchange Server 2013 : les mécanismes de haute disponibilité et la redondance...Microsoft Technet France
La nouvelle version d'Exchange Server 2013 intègre une foule de nouveautés lui permettant d'être aujourd'hui le serveur de messagerie le plus sécurisé et le plus fiable sur le marché. L'expérience acquise par la gestion des solutions de messagerie Cloud par les équipes Microsoft a été directement intégrée dans cette nouvelle version du produit ce qui va vous permettre la mise en place d'un système de messagerie ultra résilient. Scott Schnoll, Principal Technical Writer dans l'équipe Exchange à Microsoft Corp va vous expliquer de manière didactique l'ensemble des mécanismes de haute disponibilité et les solutions de resilience inter sites dans les plus petits détails. Venez apprendre directement par l'expert qui a travaillé sur ces sujets chez Microsoft ! Attention, session très technique, en anglais.
Oracle RAC 12c and Policy-Managed Databases, a Technical OverviewLudovico Caldara
Oracle RAC Policy-Managed Database (PMD) is a powerful but so far rarely used feature introduced in Oracle Database 11g
Release 2 to automate the instance administration in a dynamic, multi-node cluster.
The aim of this presentation is to review how PMD works, how to implement and administer it successfully, and how to
benefit from this technology compared to the traditional administrator-managed deployment. During the session, the new
features of the 12c Grid Infrastructure related to PMD are highlighted.
Henry Robinson works at Cloudera on distributed data collection tools like Flume and ZooKeeper. Cloudera provides support for Hadoop and open source projects like Flume. Flume is a scalable and configurable system for collecting large amounts of log and event data into Hadoop from diverse sources. It allows defining flexible data flows that can reliably move data between collection agents and storage systems.
Exchange 2013 Haute disponibilité et tolérance aux sinistres (Session 1/2 pre...Microsoft Technet France
Attention, Session en Anglais. Attention Session en 2 parties. Ceci est la première partie. Cette session sera animée par Scott Schnoll, Senior Content Developer chez Microsoft Corp et veritable Gourou Exchange. La messagerie est un élément ultra critique du système d'information : Elle ne DOIT PAS tomber. Pour cela, Exchange 2013 intègre les toutes dernières technologies en terme de tolérance de panne et de haute disponibilité. Scott Schnoll vous expliquera la mécanique de l'intérieur ! Cette session vous donne accès à l'état de l'art sur Exchange. C'est LA session à suivre pour découvrir la mécanique de haute disponibilité d'Exchange 2013.
Speaker : Scott Schnoll (Microsoft)
Now that you've seen Base 1.0, what's ahead in HBase 2.0, and beyond—and why? Find out from this panel of people who have designed and/or are working on 2.0 features.
This document provides an overview of the transport layer and transport layer protocols. It begins with an introduction to the transport layer, describing its location and functions such as providing process-to-process communication between hosts using logical connections. It then discusses transport layer services including addressing with port numbers, encapsulation/decapsulation, multiplexing/demultiplexing, flow control, error control, congestion control. Finally it describes some common transport layer protocols like UDP, TCP and their mechanisms.
Load Balancer Deployment Guide für Smoothwall Web Filter
Die Vorteile der Verwendung eines Loadbalancers mit dem Web Filter bzw. Web Proxy von Smoothwall:
Da sicherer, zuverlässiger und verfügbarer Internet Zugang essentiell und nicht nur einen Luxus darstellt, müssen Massnahmen ergriffen werden um 100% Uptime zu gewährleisten. Loadbalancer.org Appliances bieten Ihnen die perfekte Lösung dafür, indem sie das Deployment von mehreren Content Filter Devices in einem lastverteilten Hochverfügbarkeits Cluster ermöglichen.
Die Vorteile beinhalten:
• Hochverfügbarkeit / High-Availability / HA – Keine Service Unterbrechung wenn ein Web Filter versagt
• Maintenance – für Wartungsarbeiten können Web Filter einfach aus dem Cluster herausgenommen werden
• Performance – für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
Load Balancer Deployment Guide für Smoothwall Web Filter
Die Vorteile der Verwendung eines Loadbalancers mit dem Web Filter bzw. Web Proxy von Smoothwall:
Da sicherer, zuverlässiger und verfügbarer Internet Zugang essentiell und nicht nur einen Luxus darstellt, müssen Massnahmen ergriffen werden um 100% Uptime zu gewährleisten. Loadbalancer.org Appliances bieten Ihnen die perfekte Lösung dafür, indem sie das Deployment von mehreren Content Filter Devices in einem lastverteilten Hochverfügbarkeits Cluster ermöglichen.
Die Vorteile beinhalten:
• Hochverfügbarkeit / High-Availability / HA – Keine Service Unterbrechung wenn ein Web Filter versagt
• Maintenance – für Wartungsarbeiten können Web Filter einfach aus dem Cluster herausgenommen werden
• Performance – für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
Dieser Guide beschreibt die Konfiguration eines Loadbalancers für das BLOXX Web Filter bzw Content Filtering Solution. Enthalten sind empfohlene Deployment Szenarios und Konfigurationsdetails.
Die Vorteile:
- keine Unterbrechung wenn ein Web Filter versagt
- für Wartungsarbeiten können Web Filter einfach ausgetauscht werden
- für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
Dieser Guide beschreibt die Konfiguration eines Loadbalancers in Verbindung mit McAfee's Web Filter Produktpalette, wie dem McAfee Web Gateway. Enthalten sind empfohlene Deployment Szenarios und Konfigurationsdetails.
Die Vorteile der Verwendung eines Loadbalancers mit dem McAfee -Webfilter bzw. -Contentfilter:
Da sicherer, zuverlässiger und verfügbarer Internet Zugang essentiell und nicht nur einen Luxus darstellt, müssen Massnahmen ergriffen werden um 100% Uptime zu gewährleisten. Loadbalancer.org Appliances bieten Ihnen die perfekte Lösung dafür, indem sie das Deployment von mehreren Content Filter Devices in einem lastverteilten Hochverfügbarkeits Cluster ermöglichen.
Die Vorteile beinhalten:
• Hochverfügbarkeit / High-Availability / HA – Keine Service Unterbrechung wenn ein Web Filter versagt
• Maintenance – für Wartungsarbeiten können Web Filter einfach aus dem Cluster herausgenommen werden
• Performance – für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
Loadbalancer Konfigurations Optionen:
Die folgenden Sektionen beschreiben die verschiedenen Load Balancer Konfigurationsmehoden, welche beim Lastverteilen von Web Filtern möglich sind (und auch Sinn machen)....
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Dieser Guide beschreibt die Konfiguration eines Loadbalancers für Trend Micro's InterScan Web Security Web Gateway bzw Webfilter Solution. Enthalten sind empfohlene Deployment Szenarios und Konfigurationsdetails.
Die Vorteile:
- keine Unterbrechung wenn ein Web Filter ausfällt
- für Wartungsarbeiten können Web Filter einfach ausgetauscht werden
- für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
This document provides guidance on load balancing Trend Micro InterScan Web Gateway appliances using Loadbalancer.org load balancers. It recommends a layer 4 configuration with direct server return (DR) mode for high performance and transparency. The load balancer distributes traffic to multiple InterScan Gateways for high availability and easy maintenance. Detailed instructions are given for setting up proxy and transparent proxy deployment modes.
Loadbalancing von Clearswift SECURE Web Gateway - das Handbuch
Dieser Guide beschreibt die Konfiguration eines Loadbalancers für Clearswift's SECURE Web Gateway bzw Webfilter Solution. Enthalten sind empfohlene Deployment Szenarios und Konfigurationsdetails.
Die Vorteile:
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- für Wartungsarbeiten können Web Filter einfach ausgetauscht werden
- für zusätzliche Leistung können einfach weitere Content Filter zum Cluster hinzugefügt werden
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Monitoring and Managing Anomaly Detection on OpenShift
Overview
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2. Table of Contents
About this Guide............................................................................................................................................... 3
Loadbalancer.org Appliances Supported.......................................................................................................... 3
Loadbalancer.org Software Versions Supported............................................................................................... 3
Barracuda Web Filter Appliances Supported.................................................................................................... 3
Benefits of Implementing a Load Balancer....................................................................................................... 4
Load Balancer Configuration Options............................................................................................................... 4
Layer 4 (Recommended)............................................................................................................................. 4
DR Mode - Direct Server Return Mode (Recommended).......................................................................4
NAT Mode - Network Address Translation Mode....................................................................................4
Layer 7......................................................................................................................................................... 4
SNAT / HAProxy Mode - Source Network Address Translation..............................................................4
Persistence - aka Server Affinity.................................................................................................................. 5
Source IP Address (Recommended)...................................................................................................... 5
Destination Hash.................................................................................................................................... 5
Web Filter Deployment Mode........................................................................................................................... 5
Proxy Mode.................................................................................................................................................. 5
Loadbalancer.org Appliance – the Basics......................................................................................................... 6
Network Configuration................................................................................................................................. 6
Accessing the Web User Interface (WUI).................................................................................................... 7
Clustered Pair Configuration........................................................................................................................ 8
Proxy Mode....................................................................................................................................................... 9
Deployment Architecture.............................................................................................................................. 9
Load Balancer Configuration..................................................................................................................... 10
Create the Virtual Server/Service (VIP)................................................................................................ 10
Create the Real Servers (RIPs)............................................................................................................ 11
Web Filter Configuration............................................................................................................................ 12
Modify the Web Filters to accept traffic for the VIP...............................................................................12
Concept........................................................................................................................................... 12
Configuring the Barracuda Appliance.............................................................................................. 12
Web Filter Operating Mode................................................................................................................... 13
Proxy Port Configuration....................................................................................................................... 13
Client Configuration................................................................................................................................... 14
Testing & Validation......................................................................................................................................... 15
Layer 4 – Current Connections.................................................................................................................. 15
Technical Support........................................................................................................................................... 16
Appendix......................................................................................................................................................... 17
1 – Clustered Pair Configuration – Adding a Slave Unit.............................................................................17
2 – Loadbalancer.org Company Contact Information.................................................................................18
3 – Barracuda Company Contact Information............................................................................................ 19
2
3. About this Guide
This guide details the configuration of Loadbalancer.org appliances for deployment with Barracuda's range of
Web Filter products. It includes recommended deployment topologies and also steps on how to configure the
appliances.
For an introduction on setting up the load balancer as well as more technical information, please also refer to
the quick-start guides and full administration manuals which are available at the following links:
Quickstart guide: http://www.loadbalancer.org/pdf/quickstartguideLBv7.pdf
Administration manual: http://www.loadbalancer.org/pdf/loadbalanceradministrationv7.pdf
Loadbalancer.org Appliances Supported
All our products can be used for load balancing Barracuda Web Filters. The complete list of models is shown
below:
•
Enterprise R16
•
Enterprise
•
Enterprise MAX
•
Enterprise 10G
•
Enterprise R320
•
Enterprise VA
•
Enterprise VA R16
For a full specification comparison of these models please refer to: http://www.loadbalancer.org/matrix.php
Loadbalancer.org Software Versions Supported
•
v7.4.3 and later
Barracuda Web Filter Appliances Supported
•
All versions
3
4. Benefits of Implementing a Load Balancer
Since secure, reliable and available Internet access is essential and not just a luxury, steps must be taken to
ensure 100% up time. Loadbalancer.org appliances provide the perfect solution by allowing multiple Web
Filter devices to be deployed in a load balanced and highly available cluster. Benefits include:
•
•
•
High-Availability – If a Web Filter fails, service is not interrupted
Maintenance – Web Filters can easily be taken out of the cluster for maintenance
Performance – For additional performance simply add more Web Filters to the cluster
Load Balancer Configuration Options
The following sections describe the various load balancer configuration methods that are possible when load
balancing Web Filters.
Layer 4 (Recommended)
DR Mode - Direct Server Return Mode (Recommended)
In this mode, traffic from the client to the Web Filter passes via the load balancer, return traffic passes
directly back to the client which maximizes performance. Direct routing works by changing the destination
MAC address of the incoming packet on the fly which is very fast. This mode is transparent by default
meaning that the Web Filter sees the real client IP address and not the IP address of the load balancer.
Due to its speed, overall simplicity and effectiveness, Direct Routing (DR) mode with source IP persistence is
our recommended method and can be used in both proxy mode & transparent (routed) proxy mode.
NAT Mode - Network Address Translation Mode
This mode requires the implementation of a two-arm infrastructure with an internal and external subnet to
carry out the translation (the same way a firewall works). The real servers (i.e. the Web Filters) must have
their default Filter configured to be the load balancer. It offers high performance and like DR mode is
transparent by default.
Layer 7
SNAT / HAProxy Mode - Source Network Address Translation
Using HAProxy in SNAT mode means that the load balancer is acting as a full proxy and therefore it doesn't
have the same raw throughput as the layer 4 methods. Also, this method is not transparent by default so the
real servers will see the source address of each request as the load balancers IP address. This is generally
not desirable although this can be resolved in two ways; either by reading the X-Forwarded-For header that's
included by default when using HAProxy, or by enabling Tproxy on the load balancer. The issues with using
Proxy are that the default Filter on the real servers (i.e. the Web Filters) must be changed to point as the load
balancer and also it requires a two-arm infrastructure with two subnets which complicates the deployment.
SNAT mode does not have the raw throughput of the layer 4 solutions and is therefore not normally used for
Web Filter / Proxy load balancing deployments.
4
5. Persistence - aka Server Affinity
Persistence may or may not be required and depends on the specific Web Filter being used. Two possible
methods are described in the following sections.
Source IP Address (Recommended)
Source IP persistence is the standard method and is appropriate for most requirements. When set, clients
connecting from the same source IP address within the persistence timeout period (the default is 5 mins) will
always be sent to the same Web Filter.
Destination Hash
Another option is to change the load balancing algorithm (i.e. the “scheduler”) to destination hash (DH). This
causes the load balancer to select the proxy based on a hash of the destination IP address. This causes
session requests to be directed at the same server based solely on the destination IP address of a packet
which therefore makes client connections persistent for a particular Internet host.
Since this setting is a scheduler, the way connections are load balanced will also change. However it should
still provide a well balanced distribution of client sessions between Web Filter servers.
Web Filter Deployment Mode
When using a load balancer Barracuda suggest using forward proxy mode. For more information please
refer to 'Method 3' in the 'High Availability Deployment Options' section at the following link:
http://techlib.barracuda.com/display/BWFV60/High+Availability+-+Clustering+the+Barracuda+Web+Filter
Proxy Mode
This mode requires the load balancers VIP address to be defined in users browsers. This means that the
load balancer will receive client requests and then distribute these requests across the back-end Web Filters.
5
6. Loadbalancer.org Appliance – the Basics
Network Configuration
The IP address, default gateway and DNS settings can be configured in several ways depending on the
version as detailed below.
v7.5 & Later
Configure the IP address, Default Gateway & DNS Settings
Using the Network Setup Wizard at the console:
After boot, follow the console instructions to configure the IP address, gateway and DNS settings..
Using the WUI:
Using a browser, connect to the WUI on the default IP address/port: http://192.168.2.21:9080
to set the IP address use: Local Configuration > Network Interface Configuration
to set the default gateway use: Local Configuration > Routing
to configure DNS settings use: Local Configuration > Hostname & DNS
Using Linux commands:
At the console, set the initial IP address using the following command:
ip addr add <IP address>/<mask> dev eth0
e.g. ip addr add 192.168.2.10/24 dev eth0
At the console, set the initial default gateway using the following command:
route add default gw <IP address> <interface>
e.g. route add default gw 192.168.2.254 eth0
At the console, set the DNS server using the following command:
echo nameserver <IP address> >> /etc/resolv.conf
e.g. echo nameserver 192.168.64.1 >> /etc/resolv.conf
N.B. If this method is used, you must also configure these settings using the WUI, otherwise settings will be
lost after a reboot
v7.4.3
Configure the IP address & Default Gateway
Using the Network Setup Wizard at the console:
After boot, follow the console instructions to configure the IP address and gateway using the Network Setup
Wizard.
N.B. For these software versions the network setup wizard does not support DNS server configuration. DNS
servers must be defined using the WUI or Linux commands as explained below.
6
7. Configure the IP address, Default Gateway & DNS Settings
Using the WUI:
Using a browser, connect to the WUI on the default IP address:port: http://192.168.2.21:9080
to set the IP address use: Edit Configuration > Network Interface Configuration
to set the default gateway use: Edit Configuration > Routing
to configure DNS settings use: Edit Configuration > Hostname & DNS
Using Linux commands:
At the console, set the initial IP address using the following command:
ip addr add <IP address>/<mask> dev eth0
e.g. ip addr add 192.168.2.10/24 dev eth0
At the console, set the initial default gateway using the following command:
route add default gw <IP address> <interface>
e.g. route add default gw 192.168.2.254 eth0
At the console, set the DNS server using the following command:
echo nameserver <IP address> >> /etc/resolv.conf
e.g. echo nameserver 192.168.64.1 >> /etc/resolv.conf
N.B. If this method is used, you must also configure these settings using the WUI, otherwise settings will be
lost after a reboot
Accessing the Web User Interface (WUI)
The WUI can be accessed from a browser at: http://192.168.2.21:9080/lbadmin
* Note the port number → 9080
(replace 192.168.2.21 with the IP address of your load balancer if its been changed from the default)
Username: loadbalancer
Password: loadbalancer
Once you have entered the logon credentials the Loadbalancer.org Web User Interface will be displayed as
shown below:
The screen shot below shows the v7.5 WUI once logged in:
7
8. Clustered Pair Configuration
Loadbalancer.org recommend that load balancer appliances are deployed in pairs for high availability. In this
guide s single unit is deployed first, adding a secondary slave unit is covered in section 1 of the Appendix.
NOTE: It's highly recommended that you have a working Web Filter environment first before
implementing the load balancer.
8
9. Proxy Mode
Deployment Architecture
Client
PC 1
Client
PC 2
Default
Gateway
Router
Firewall
Internet
Client
PC n
Load Balancer 1
(master)
Heartbeat
Load Balancer 2
(slave)
Barracuda
Web Filter 1
Barracuda
Web Filter 2
Notes
•
Browser settings on client PC's must be changed to point at the Virtual Server/Service (VIP) on the
load balancer
•
The load balancer(s) must be configured in Layer 4 DR mode
•
The Barracuda Web Filters must be configured to accept traffic for the VIP (see page 12)
•
Typically, two loadbalancer.org appliances are deployed for resilience – this is our recommended
configuration
•
For more information on Barracuda Web Filter deployment options please refer to the following URL:
http://techlib.barracuda.com/BWFDeploymentOptions
9
10. Load Balancer Configuration
Create the Virtual Server/Service (VIP)
NOTE: Prior to v7.5 a VIP is known as a 'Virtual Server', from v7.5 onwards it's known as a 'Virtual
Service'. For simplicity the configuration steps below refer to 'Virtual Service' for both.
•
v7.5 & later – using the WUI go to Cluster Configuration > Layer 4 – Virtual Services
•
v7.4.3 – using the WUI go to Edit Configuration > Layer 4 – Virtual Servers
•
Click [Add a New Virtual Service]
•
Enter the following details:
•
Enter an appropriate label (name) for the VIP, e.g. Proxy
•
Set the Virtual Service IP address field to the required IP address, e.g. 192.168.2.202
•
Set the Virtual Service Ports field to the required port (the same as the Web Filters) , e.g. 8080
•
Ensure that Forwarding Method is set to Direct Return
•
Set Persistent to yes
•
Ensure that Protocol is set to TCP
•
Click Update
10
11. Create the Real Servers (RIPs)
•
v7.5 & later – using the WUI go to Cluster Configuration > Layer 4 – Real Servers
•
v7.4.3 – using the WUI go to Edit Configuration > Layer 4 – Real Servers
•
Click [Add a new Real Server] next to the newly created VIP
•
Enter the following details:
•
Enter an appropriate label (name) for the first Proxy Server, e.g. Proxy1
•
Change the Real Server IP Address field to the required IP address, e.g. 192.168.2.210
•
Click Update
•
Repeat the above steps to add your other Web Filters
11
12. Web Filter Configuration
Modify the Web Filters to accept traffic for the VIP
Concept
As mentioned previously, DR mode is our recommended load balancer operating mode. To use this mode,
changes are required to the real servers, i.e. the Web Filters. The real servers must accept traffic for the VIP,
but they must not respond to any ARP requests for that IP, only the VIP should do this.
To configure a Linux based Web Filter appliance to accept traffic for the VIP the following line must be added
to the rc.local startup script on each Web Filter appliance:
iptables -t nat -A PREROUTING -p tcp -d <VIP address> -j REDIRECT
e.g.
iptables -t nat -A PREROUTING -p tcp -d 192.168.2.202 -j REDIRECT
i.e. Redirect any incoming packets destined for the VIP to the local address
N.B. For more information please refer to the administration manuals and search for 'ARP Problem'
Configuring the Barracuda Appliance
NOTE: For Barracuda Web Filters you must contact Barracuda support directly to enable DR mode
(aka DSR mode). Please refer to the following link for more information:
https://www.barracuda.com/support/knowledgebase/50160000000Ib4dAAC
12
13. Web Filter Operating Mode
By default the Barracuda Web Filter supports Proxy mode on port 8080 with no configuration changes.
Proxy Port Configuration
If required the proxy port can be changed using the WUI option: Advanced > Proxy and defining the required
port in the Proxy Port field.
N.B. The default proxy port for Barracuda Web Filters is 8080
13
14. Client Configuration
Client browser settings must be set so that browsers connect via the VIP. In a Microsoft based LAN
environment, this is typically achieved using AD group policy.
14
15. Testing & Validation
To verify that the traffic is passing through the load balancer correctly the following reporting options can be
used:
System Overview
Reports > Layer 4 Status
Reports > Layer 4 Current Connections
Many reporting and dashboard options are also available in the Barracuda user interface. For more details
please refer to the appropriate Barracuda documentation
Layer 4 – Current Connections
The example screen shot below illustrates that the test client (192.168.64.7) sends requests to the VIP
(192.168.111.88), the load balancer then forwards the request onto the Web Filter (192.168.64.60).
15
17. Appendix
1 – Clustered Pair Configuration – Adding a Slave Unit
If you initially configured just the master unit and now need to add a slave, please refer the section 'Adding a
slave unit after the master has been configured' in the v7.x administration manual which is available at the
following link: http://www.loadbalancer.org/pdf/loadbalanceradministrationv7.pdf
Don't hesitate to contact our support team if you need any further assistance configuring a slave
appliance: support@loadbalancer.org
17
18. 2 – Loadbalancer.org Company Contact Information
Website
URL : www.loadbalancer.org
North America (US)
Loadbalancer.org, Inc.
270 Presidential Drive
Wilmington,
DE 19807
USA
Tel
Fax
Email (sales)
Email (support)
:
:
:
:
North America (Canada)
+1 866.229.8562 (24x7)
+1 302.213.0122
sales@loadbalancer.org
support@loadbalancer.org
Loadbalancer.org Ltd.
300-422 Richards Street
Vancouver, BC
V6B 2Z4
Canada
Tel
Fax
Email (sales)
Email (support)
:
:
:
:
Europe (UK)
+1 604.629.7575
+1 302.213.0122
sales@loadbalancer.org
support@loadbalancer.org
Loadbalancer.org Ltd.
Portsmouth Technopole
Kingston Crescent
Portsmouth
PO2 8FA
England, UK
Tel
Fax
Email (sales)
Email (support)
:
:
:
:
Europe (Germany)
+44(0)870 4438779 (24x7)
+44(0)870 4327672
sales@loadbalancer.org
support@loadbalancer.org
Loadbalancer.org GmbH
Alt Pempelfort 2
40211 Düsseldorf
Germany
Tel
Fax
Email (sales)
Email (support)
:
:
:
:
+49 (0)30 920 383 6494
+49 (0)30 920 383 6495
vertrieb@loadbalancer.org
support@loadbalancer.org
18
19. 3 – Barracuda Company Contact Information
Website
Worldwide Support
Options
URL : www.barracuda.com
Barracuda support:
https://www.barracuda.com/support
19