This document demonstrates how to backup and restore a router configuration file using a TFTP server. It shows configuring passwords and IP addresses on the router, backing up the running configuration and IOS file to the TFTP server, erasing the startup configuration on the router, and restoring the configuration from the TFTP server. This allows securely storing the router configuration off-device for backup and restoration purposes.
The document describes the startup process of a Cisco router. The router performs system startup routines to initiate the router software. It can fall back to alternatives if needed. The initial configuration dialog allows setting parameters like the host name, passwords, and interfaces. The Cisco IOS software provides context-sensitive help and command history functions to help with the command-line interface.
The document provides instructions for configuring an authenticated Samba server with OpenVPN for secure remote access. Key steps include:
1. Installing Samba, CUPS and other required packages. Configuring firewall rules to allow SMB ports and sharing a directory.
2. Editing the Samba configuration file to define the shared directory and users. Starting the Samba and name resolution services.
3. Testing access from Linux and Windows clients.
4. Hardening the server with iptables firewall rules and installing ClamAV for antivirus scanning of the shared directory. Scheduling freshclam and clamscan to run periodically.
PostgreSQL Portland Performance Practice Project - Database Test 2 TuningMark Wong
This document summarizes the results of tuning a PostgreSQL database using the tool pgtune. It shows the performance improvements achieved by configuring various PostgreSQL configuration options like shared_buffers and work_mem as recommended by pgtune. It also discusses the effects of changing the effective_cache_size parameter and physical disk layout optimizations on an older system with multiple disk arrays. Overall, pgtune helped improve performance by 7% and separating data files from logs saw further gains.
PostgreSQL Portland Performance Practice Project - Database Test 2 HowtoMark Wong
Fourth presentation in a speaker series sponsored by the Portland State University Computer Science Department. The series covers PostgreSQL performance with an OLTP (on-line transaction processing) workload called Database Test 2 (DBT-2). This presentation is a set of examples to go along with the live presentation given on March 12, 2009.
This document provides instructions for configuring a DNS server on a Linux system. It involves setting a static IP address and hostname, installing bind packages, configuring the named.conf and zone files, and testing the DNS resolution. Key steps include editing configuration files like ifcfg, hosts, named.conf, and zone files; installing and enabling the named service; and checking DNS resolution works for internal and external names.
Modul mengamankan jaringan dhcp server menggunakan arp reply only menggunakan...Een Pahlefi
1) The document discusses configuring a MikroTik router to serve as an ARP-reply only DHCP server.
2) It provides steps to change the identity and IP address of the router, set one interface as ARP-reply only, and configure DHCP server settings including adding ARP entries for leases.
3) Testing confirms that clients can only obtain IP addresses automatically via DHCP, and cannot ping or access the router if manually configuring an IP address.
The document provides instructions for compiling a custom Linux kernel and adding a new system call. It describes creating a new partition, mounting it, extracting and compiling the kernel source code. It also details adding a new system call to return a unique ID, including modifying configuration files, implementing the system call code, and testing the new system call. After compiling the kernel, the instructions describe installing modules, creating an initramfs, copying kernel files to the boot directory, and configuring GRUB to boot the new kernel.
The document describes the startup process of a Cisco router. The router performs system startup routines to initiate the router software. It can fall back to alternatives if needed. The initial configuration dialog allows setting parameters like the host name, passwords, and interfaces. The Cisco IOS software provides context-sensitive help and command history functions to help with the command-line interface.
The document provides instructions for configuring an authenticated Samba server with OpenVPN for secure remote access. Key steps include:
1. Installing Samba, CUPS and other required packages. Configuring firewall rules to allow SMB ports and sharing a directory.
2. Editing the Samba configuration file to define the shared directory and users. Starting the Samba and name resolution services.
3. Testing access from Linux and Windows clients.
4. Hardening the server with iptables firewall rules and installing ClamAV for antivirus scanning of the shared directory. Scheduling freshclam and clamscan to run periodically.
PostgreSQL Portland Performance Practice Project - Database Test 2 TuningMark Wong
This document summarizes the results of tuning a PostgreSQL database using the tool pgtune. It shows the performance improvements achieved by configuring various PostgreSQL configuration options like shared_buffers and work_mem as recommended by pgtune. It also discusses the effects of changing the effective_cache_size parameter and physical disk layout optimizations on an older system with multiple disk arrays. Overall, pgtune helped improve performance by 7% and separating data files from logs saw further gains.
PostgreSQL Portland Performance Practice Project - Database Test 2 HowtoMark Wong
Fourth presentation in a speaker series sponsored by the Portland State University Computer Science Department. The series covers PostgreSQL performance with an OLTP (on-line transaction processing) workload called Database Test 2 (DBT-2). This presentation is a set of examples to go along with the live presentation given on March 12, 2009.
This document provides instructions for configuring a DNS server on a Linux system. It involves setting a static IP address and hostname, installing bind packages, configuring the named.conf and zone files, and testing the DNS resolution. Key steps include editing configuration files like ifcfg, hosts, named.conf, and zone files; installing and enabling the named service; and checking DNS resolution works for internal and external names.
Modul mengamankan jaringan dhcp server menggunakan arp reply only menggunakan...Een Pahlefi
1) The document discusses configuring a MikroTik router to serve as an ARP-reply only DHCP server.
2) It provides steps to change the identity and IP address of the router, set one interface as ARP-reply only, and configure DHCP server settings including adding ARP entries for leases.
3) Testing confirms that clients can only obtain IP addresses automatically via DHCP, and cannot ping or access the router if manually configuring an IP address.
The document provides instructions for compiling a custom Linux kernel and adding a new system call. It describes creating a new partition, mounting it, extracting and compiling the kernel source code. It also details adding a new system call to return a unique ID, including modifying configuration files, implementing the system call code, and testing the new system call. After compiling the kernel, the instructions describe installing modules, creating an initramfs, copying kernel files to the boot directory, and configuring GRUB to boot the new kernel.
Modul dhcp server menggunakan mikrotik osEen Pahlefi
The document provides steps to configure a MikroTik router as a DHCP server to assign IP addresses to client devices on the network. It involves changing the router's identity, adding an IP address and IP pool, enabling the DHCP server on an interface, and configuring DHCP network options. Finally, it verifies a client device receives an IP address from the router's DHCP server as shown by the client's IP configuration details.
This document provides an overview of commonly used router commands organized into the following categories: keyboard shortcuts, configuration, general commands, privileged mode commands, setting passwords, router processes and statistics, IP commands, CDP commands, IPX commands, routing protocols, access lists, WAN configurations, and miscellaneous commands. It includes brief explanations and examples of commands for configuring, monitoring, and troubleshooting a router.
Tuned is a tool that dynamically tunes Linux system settings for optimal performance based on usage profiles. It was created to allow systems to be tuned for peak performance during high workload times while saving power during idle periods. Tuned includes several predefined profiles that adjust settings for common use cases like high throughput, low latency, or power saving. New in Red Hat Enterprise Linux 7, Tuned is installed by default and will automatically select an initial profile based on system type. It also includes additional tuning capabilities and monitoring plugins for even more dynamic optimization of subsystems.
This presentation discusses several new features in Oracle Database 12c including:
1) Total Recall which allows querying historical data as of a past timestamp using Flashback Archive.
2) Context extension which captures additional context like user, client, and IP address with redo data in Flashback Archive.
3) TRUNCATE TABLE now supports cascading deletes to dependent child tables when referenced keys have ON DELETE CASCADE constraints.
How to Save, backup and restore IOS on Cisco routertcpipguru
This document provides instructions for saving, backing up, and restoring configurations on a Cisco 1751 router. It describes how to save the running configuration to the startup configuration, backup the running configuration to a TFTP server, and restore a running configuration stored on a TFTP server. The TFTP server IP address is 192.168.1.15. To backup the configuration, the router copies the running configuration file to the TFTP server and names it "run-config backup". To restore, it copies the "run-config" file from the TFTP server to the router's running configuration.
This document provides a CCNA command cheat sheet covering Cisco IOS commands for the CCNA exam. It includes sections summarizing commands for Cisco device configuration, interface configuration, routing protocols, privilege mode commands, and more. The cheat sheet covers both ICND exam parts 1 and 2 and is intended to help review the majority of commands found on the CCNA exam.
This is the document which explain the step by step procedure to upgrade PowerVC from 1.3.0.2 to 1.3.2.0. I've added useful information in the documents.
The document describes the initialization phase of an IMPORT job in Sqoop 2. It shows that the SqoopInputFormat gets splits from the database, which are then passed to the Partitioner to determine how to partition the data among mapper tasks. This establishes the basic workflow of reading data from the source and partitioning it for import into HDFS.
The document discusses monitoring and tuning Oracle databases on z/OS and z/Linux systems. It provides an overview of using Statspack to diagnose performance issues from high CPU usage, I/O utilization, or memory usage based on timed events, SQL statements, and tablespace I/O statistics. Potential causes and remedies are described for each area that could lead to bad response times.
ARM Linux Booting Process
One must be wondering How this Embedded Devices come to life? What goes into this devices that will tune to users Commands. We are going to explain about Embedded Arm based devices in general as The ARM architecture is a widely used 32-bit RISC processor architecture. In fact, the ARM family accounts for about 75% of all 32-bit CPUs, and about 90% of all embedded 32-bit CPUs.
Shak larry-jeder-perf-and-tuning-summit14-part1-finalTommy Lee
This document provides an overview and agenda for a performance analysis and tuning presentation focusing on Red Hat Enterprise Linux evolution, NUMA scheduling improvements, and use of cgroups/containers for resource management. Key points include how RHEL has incorporated features like tuned profiles, transparent hugepages, automatic NUMA balancing, and how cgroups can guarantee quality of service and enable dynamic resource allocation for multi-application environments. Performance results are shown for databases and SPEC benchmarks utilizing these features.
How to shutdown and power up of the netapp cluster mode storage systemSaroj Sahu
This slide will guide you how to shutdown and power up of the Netapp cluster mode storage system in command mode. (It will depict you environmental shutdown process (SAN environment in a DataCenter)
How to Shutdown Netapp Cluster Mode Storage System with Multi-Node Cluster (6...Saroj Sahu
Here we have explain step by step how to shutdown the Netapp storage System with Multi-Node Cluster (6 nodes cluster with ontap version 9.1P14 with model FAS8200, AFF8040 & AFF8020)
This document discusses using Oracle Database's block change tracking and direct NFS features to enable fast cloning of databases for development and testing purposes at low cost. Block change tracking allows incremental backups to be performed quickly, while direct NFS allows database files to be copied over the network efficiently to create clones that only require storage for changed blocks. Examples are provided demonstrating how this can be used to regularly clone a production database to multiple developer environments.
DNS windows server(2008R2) & linux(SLES 11)Tola LENG
In this practice you will be able:
-Configure Primary DNS and Secondary DNS
-Configure DNS zone transter
-DNS Delegation
-DNS Security zone transfer
-Configure also Linux(Sles 11) and Windows Server 2008R2
This document provides an overview of setting up an optimal UNIX development environment. It discusses customizing shell functions and aliases, using package managers like Homebrew and Apt to install tools, and configuring Tmux, Vim, and Zsh for productivity. Key tools demonstrated include Htop, Iftop, Grc, Glances, Oh-My-Zsh plugins, and the 'z' command for navigating directories. The document aims to remove boring defaults and make the environment highly usable for developers.
Install tomcat 5.5 in debian os and deploy war fileNguyen Cao Hung
This document provides instructions for installing and configuring Tomcat and PostgreSQL on a Debian server. It includes steps to install Tomcat 5 and 7, add users, configure Java version 1.7, copy files to the server, configure properties, recompile for the Debian environment, deploy WAR files, test, and check services. It also provides commands for managing files, directories, and users in Linux.
MySQLinsanity! This document provides an overview of Stanley Huang's MySQL performance tuning experience and expertise. It begins with introductions and background on Stanley Huang. It then discusses the typical phases of MySQL performance tuning projects, including SQL tuning and RDBMS tuning. Specific tips are provided around topics like slow query logging, index usage, partitioning, and server configuration. The document concludes with an invitation for questions.
Basic Security
@ Updates
-Update manager
-Enable automatic security updates(Update Setting)
=> Super windows => type the key word (System Setting) =>
@ Firewall
-In Ubuntu all ports are block by default
-Default firewall-ufw (turned off by default)
+sudo ufw status
+sudo ufw enable/disable
-Firestarter for graphical interface (recommanded)
+sudo apt-get install firestarter
+Preferences
@ User Accounts
-User & Groups
+Disable user guest
-Do not use root user (Disable by default)
+sudo passwd
+sudo passwd -l root (disable/changed expiry password)
-Use sudo instead of root (/etc/sudoers)
+sudo visudo OR sudo gedit /etc/sudoers(To set the privilege user authorized)
+sudo adduser tolaleng sudo
-Deleting Users
+sudo deluser canamall
-Removing world readable permission to home directory
+sudo chmod 0750 /home/username
-Locking/Unlocking user
+sudo passwd -l username (enable user expiry)
+sudo passwd -u username (disable user expiry)
-passwords
+sudo chage canamall (Set the password expiration)
+sudo chage-l canamall (show the password expiration)
@ Antivirus
-Clam TK (Under Accessories), other anti-virus
@ Unistall Applications
-Ubuntu Software Center-> Installed software section-> Select application and click remove
@ Processes
-To see processes
+ps aux or top
+system monitor(cacti, nagios,)
-
@ Logs
-Some of logs
+ /var/log/messages : general log messages
+ /var/log/boot : system boot log
+ /var/log/debug/ : debugging log messages
+ /var/log/auth.log : user login and authentication logs
+ /var/log/daemon.log : running services such as squid,ntpd and other log message to this file
+ /var/log/kern.log : kernel log file
-Viewing logs
+ tail, more, cat, less, grep
+ GNOME system log viewer
@Firewall
ufw
=> Security Host
* Create Standard User and enable user passwd (complexity password, strong passwd, passwd expired, invalid day of passwd, Lock and Unlock user, disable user Guest, )
* Secure remote network and host
-Telnet(Secure with the host and address connection)
-SSH (Secure with the authentication encryption key)
=> Security Backup (Data Hosting)
*Make a Full Backup of Your Machine
-Aptik (backup application)
-rsync (Remote synce)
-Gsync (Remote)
-Amanda
-Rsnapshot
The document discusses Cisco Discovery Protocol (CDP) and how it can be used to gather information about neighboring and remote network devices. CDP discovers information like device identifiers, address lists, port identifiers, and capabilities without needing to know the data link layer protocol. The summary also describes how to use commands like show cdp neighbor, show cdp entry, ping, and telnet to view CDP information and connect to remote devices.
Upon reading the document, the key steps in a router's start-up process can be summarized as follows:
1. When power is applied, the router performs a power-on self-test and loads the bootstrap code from ROM to initialize hardware and find the IOS image.
2. The IOS image is then loaded from flash memory or another source such as TFTP into RAM where it is decompressed and executed.
3. The startup configuration is loaded, typically from NVRAM. If no configuration is present, the router enters setup mode to configure initial settings.
This document provides instructions for configuring Cisco routers and switches. It includes details on:
- Memory types on Cisco devices like RAM, NVRAM, FLASH, and ROM
- Show commands to view configurations, interfaces, versions, and more
- Configuring IP addresses, descriptions, saving configurations
- Common configuration mode commands
- Configuring IP addresses, default gateways on switches on VLAN 1 interfaces
The document then provides tasks for configuring hostnames, IP addresses on all devices, assigning IP settings to PCs, and testing connectivity using ping commands to verify reachability between devices on the same and different networks.
Modul dhcp server menggunakan mikrotik osEen Pahlefi
The document provides steps to configure a MikroTik router as a DHCP server to assign IP addresses to client devices on the network. It involves changing the router's identity, adding an IP address and IP pool, enabling the DHCP server on an interface, and configuring DHCP network options. Finally, it verifies a client device receives an IP address from the router's DHCP server as shown by the client's IP configuration details.
This document provides an overview of commonly used router commands organized into the following categories: keyboard shortcuts, configuration, general commands, privileged mode commands, setting passwords, router processes and statistics, IP commands, CDP commands, IPX commands, routing protocols, access lists, WAN configurations, and miscellaneous commands. It includes brief explanations and examples of commands for configuring, monitoring, and troubleshooting a router.
Tuned is a tool that dynamically tunes Linux system settings for optimal performance based on usage profiles. It was created to allow systems to be tuned for peak performance during high workload times while saving power during idle periods. Tuned includes several predefined profiles that adjust settings for common use cases like high throughput, low latency, or power saving. New in Red Hat Enterprise Linux 7, Tuned is installed by default and will automatically select an initial profile based on system type. It also includes additional tuning capabilities and monitoring plugins for even more dynamic optimization of subsystems.
This presentation discusses several new features in Oracle Database 12c including:
1) Total Recall which allows querying historical data as of a past timestamp using Flashback Archive.
2) Context extension which captures additional context like user, client, and IP address with redo data in Flashback Archive.
3) TRUNCATE TABLE now supports cascading deletes to dependent child tables when referenced keys have ON DELETE CASCADE constraints.
How to Save, backup and restore IOS on Cisco routertcpipguru
This document provides instructions for saving, backing up, and restoring configurations on a Cisco 1751 router. It describes how to save the running configuration to the startup configuration, backup the running configuration to a TFTP server, and restore a running configuration stored on a TFTP server. The TFTP server IP address is 192.168.1.15. To backup the configuration, the router copies the running configuration file to the TFTP server and names it "run-config backup". To restore, it copies the "run-config" file from the TFTP server to the router's running configuration.
This document provides a CCNA command cheat sheet covering Cisco IOS commands for the CCNA exam. It includes sections summarizing commands for Cisco device configuration, interface configuration, routing protocols, privilege mode commands, and more. The cheat sheet covers both ICND exam parts 1 and 2 and is intended to help review the majority of commands found on the CCNA exam.
This is the document which explain the step by step procedure to upgrade PowerVC from 1.3.0.2 to 1.3.2.0. I've added useful information in the documents.
The document describes the initialization phase of an IMPORT job in Sqoop 2. It shows that the SqoopInputFormat gets splits from the database, which are then passed to the Partitioner to determine how to partition the data among mapper tasks. This establishes the basic workflow of reading data from the source and partitioning it for import into HDFS.
The document discusses monitoring and tuning Oracle databases on z/OS and z/Linux systems. It provides an overview of using Statspack to diagnose performance issues from high CPU usage, I/O utilization, or memory usage based on timed events, SQL statements, and tablespace I/O statistics. Potential causes and remedies are described for each area that could lead to bad response times.
ARM Linux Booting Process
One must be wondering How this Embedded Devices come to life? What goes into this devices that will tune to users Commands. We are going to explain about Embedded Arm based devices in general as The ARM architecture is a widely used 32-bit RISC processor architecture. In fact, the ARM family accounts for about 75% of all 32-bit CPUs, and about 90% of all embedded 32-bit CPUs.
Shak larry-jeder-perf-and-tuning-summit14-part1-finalTommy Lee
This document provides an overview and agenda for a performance analysis and tuning presentation focusing on Red Hat Enterprise Linux evolution, NUMA scheduling improvements, and use of cgroups/containers for resource management. Key points include how RHEL has incorporated features like tuned profiles, transparent hugepages, automatic NUMA balancing, and how cgroups can guarantee quality of service and enable dynamic resource allocation for multi-application environments. Performance results are shown for databases and SPEC benchmarks utilizing these features.
How to shutdown and power up of the netapp cluster mode storage systemSaroj Sahu
This slide will guide you how to shutdown and power up of the Netapp cluster mode storage system in command mode. (It will depict you environmental shutdown process (SAN environment in a DataCenter)
How to Shutdown Netapp Cluster Mode Storage System with Multi-Node Cluster (6...Saroj Sahu
Here we have explain step by step how to shutdown the Netapp storage System with Multi-Node Cluster (6 nodes cluster with ontap version 9.1P14 with model FAS8200, AFF8040 & AFF8020)
This document discusses using Oracle Database's block change tracking and direct NFS features to enable fast cloning of databases for development and testing purposes at low cost. Block change tracking allows incremental backups to be performed quickly, while direct NFS allows database files to be copied over the network efficiently to create clones that only require storage for changed blocks. Examples are provided demonstrating how this can be used to regularly clone a production database to multiple developer environments.
DNS windows server(2008R2) & linux(SLES 11)Tola LENG
In this practice you will be able:
-Configure Primary DNS and Secondary DNS
-Configure DNS zone transter
-DNS Delegation
-DNS Security zone transfer
-Configure also Linux(Sles 11) and Windows Server 2008R2
This document provides an overview of setting up an optimal UNIX development environment. It discusses customizing shell functions and aliases, using package managers like Homebrew and Apt to install tools, and configuring Tmux, Vim, and Zsh for productivity. Key tools demonstrated include Htop, Iftop, Grc, Glances, Oh-My-Zsh plugins, and the 'z' command for navigating directories. The document aims to remove boring defaults and make the environment highly usable for developers.
Install tomcat 5.5 in debian os and deploy war fileNguyen Cao Hung
This document provides instructions for installing and configuring Tomcat and PostgreSQL on a Debian server. It includes steps to install Tomcat 5 and 7, add users, configure Java version 1.7, copy files to the server, configure properties, recompile for the Debian environment, deploy WAR files, test, and check services. It also provides commands for managing files, directories, and users in Linux.
MySQLinsanity! This document provides an overview of Stanley Huang's MySQL performance tuning experience and expertise. It begins with introductions and background on Stanley Huang. It then discusses the typical phases of MySQL performance tuning projects, including SQL tuning and RDBMS tuning. Specific tips are provided around topics like slow query logging, index usage, partitioning, and server configuration. The document concludes with an invitation for questions.
Basic Security
@ Updates
-Update manager
-Enable automatic security updates(Update Setting)
=> Super windows => type the key word (System Setting) =>
@ Firewall
-In Ubuntu all ports are block by default
-Default firewall-ufw (turned off by default)
+sudo ufw status
+sudo ufw enable/disable
-Firestarter for graphical interface (recommanded)
+sudo apt-get install firestarter
+Preferences
@ User Accounts
-User & Groups
+Disable user guest
-Do not use root user (Disable by default)
+sudo passwd
+sudo passwd -l root (disable/changed expiry password)
-Use sudo instead of root (/etc/sudoers)
+sudo visudo OR sudo gedit /etc/sudoers(To set the privilege user authorized)
+sudo adduser tolaleng sudo
-Deleting Users
+sudo deluser canamall
-Removing world readable permission to home directory
+sudo chmod 0750 /home/username
-Locking/Unlocking user
+sudo passwd -l username (enable user expiry)
+sudo passwd -u username (disable user expiry)
-passwords
+sudo chage canamall (Set the password expiration)
+sudo chage-l canamall (show the password expiration)
@ Antivirus
-Clam TK (Under Accessories), other anti-virus
@ Unistall Applications
-Ubuntu Software Center-> Installed software section-> Select application and click remove
@ Processes
-To see processes
+ps aux or top
+system monitor(cacti, nagios,)
-
@ Logs
-Some of logs
+ /var/log/messages : general log messages
+ /var/log/boot : system boot log
+ /var/log/debug/ : debugging log messages
+ /var/log/auth.log : user login and authentication logs
+ /var/log/daemon.log : running services such as squid,ntpd and other log message to this file
+ /var/log/kern.log : kernel log file
-Viewing logs
+ tail, more, cat, less, grep
+ GNOME system log viewer
@Firewall
ufw
=> Security Host
* Create Standard User and enable user passwd (complexity password, strong passwd, passwd expired, invalid day of passwd, Lock and Unlock user, disable user Guest, )
* Secure remote network and host
-Telnet(Secure with the host and address connection)
-SSH (Secure with the authentication encryption key)
=> Security Backup (Data Hosting)
*Make a Full Backup of Your Machine
-Aptik (backup application)
-rsync (Remote synce)
-Gsync (Remote)
-Amanda
-Rsnapshot
The document discusses Cisco Discovery Protocol (CDP) and how it can be used to gather information about neighboring and remote network devices. CDP discovers information like device identifiers, address lists, port identifiers, and capabilities without needing to know the data link layer protocol. The summary also describes how to use commands like show cdp neighbor, show cdp entry, ping, and telnet to view CDP information and connect to remote devices.
Upon reading the document, the key steps in a router's start-up process can be summarized as follows:
1. When power is applied, the router performs a power-on self-test and loads the bootstrap code from ROM to initialize hardware and find the IOS image.
2. The IOS image is then loaded from flash memory or another source such as TFTP into RAM where it is decompressed and executed.
3. The startup configuration is loaded, typically from NVRAM. If no configuration is present, the router enters setup mode to configure initial settings.
This document provides instructions for configuring Cisco routers and switches. It includes details on:
- Memory types on Cisco devices like RAM, NVRAM, FLASH, and ROM
- Show commands to view configurations, interfaces, versions, and more
- Configuring IP addresses, descriptions, saving configurations
- Common configuration mode commands
- Configuring IP addresses, default gateways on switches on VLAN 1 interfaces
The document then provides tasks for configuring hostnames, IP addresses on all devices, assigning IP settings to PCs, and testing connectivity using ping commands to verify reachability between devices on the same and different networks.
The document shows the boot up process and initial configuration of a Cisco router, including the startup banner, software version, and memory details. It then walks through configuring basic settings like IP addresses on two interfaces and saving the configuration. Various messages indicate the interfaces are initialized and configuration changes.
The document discusses various topics for managing a Cisco internetwork including Cisco router components, the boot sequence, configuration registers, backing up and restoring the IOS and configuration, Cisco Discovery Protocol, Telnet, resolving hostnames, and troubleshooting tools. It provides details on these topics such as how to back up and restore configurations and software, use CDP to view neighbor information, set Telnet passwords, build a host table or use DNS for name resolution, and check network connectivity.
The document discusses various topics for managing a Cisco internetwork including Cisco router components, the boot sequence, configuration registers, backing up and restoring the IOS and configuration, Cisco Discovery Protocol, Telnet, resolving hostnames, and troubleshooting tools. It provides details on these topics such as how to back up and restore configurations and IOS files, view CDP neighbor information, set Telnet passwords, build a host table, and use DNS. The document is intended to help understand managing Cisco routers and internetworks.
This document provides a CCNA command cheat sheet covering Cisco IOS commands for both ICND parts 1 & 2 and the current CCNA exam. It includes summaries of Cisco modes and keyboard shortcuts, commands for device configuration, interface configuration, and protocols. Privileged commands are also covered such as show commands for viewing configurations, interfaces, routing tables, and more.
This document provides a CCNA command cheat sheet covering Cisco IOS commands for the CCNA exam. It includes sections summarizing commands for Cisco device configuration, interface configuration, routing protocols, privilege mode commands, and more. The cheat sheet covers both ICND exam parts 1 and 2 and is intended to help review the majority of commands found on the CCNA exam.
This document provides a CCNA command cheat sheet covering Cisco IOS commands for the CCNA exam. It includes sections summarizing commands for Cisco device configuration, interface configuration, routing protocols, privilege mode commands, and more. The cheat sheet covers both ICND exam parts 1 and 2 and is intended to help review the majority of commands found on the CCNA exam.
Static routing is a manual process where the network administrator manually enters routes into the routing table of a router. Some key points about static routing:
- Routes are manually configured on each router and do not change unless the administrator makes changes.
- Not scalable for large networks as routes need to be configured on each router.
- Useful for small networks or as a backup when dynamic routing protocols fail.
- Implemented using the ip route command on Cisco routers.
B) Dynamic routing protocols
- Routing tables are automatically updated as network changes occur.
- Routing protocols like RIP, IGRP, EIGRP, OSPF are routing protocols that dynamically learn routes and share this
This document provides an overview of a workshop on CCNA simulations using Packet Tracer. It includes an agenda with topics such as configuring routers, assigning IP addresses, DHCP, NAT, routing protocols, access lists, and switches. It then goes into more detail on topics like the Packet Tracer software, basic router configuration, components of a router like RAM, NVRAM, flash memory, and interfaces. It also covers commands for viewing configurations and interface status. The workshop aims to help participants learn how to configure common networking features in Packet Tracer to prepare for CCNA certification.
Talk given by David Peterson, Lead Systems Engineer at Salesforce, at StackiFest in March 2016
Enterprise bare metal provisioning using Stacki at Salesforce/Pardot and how we've configured it in our environment. It used to take the Ops teams hours to do end-to-end provisioning with chef integration to now it takes about 15 minutes with it all being automated. In this presentation, I will discuss:
- Why we chose Stacki
- Hardware and provisioning requirements
- Stacki configuration with chef integration
- ZFS and data safe re-provisioning
- Detecting issues and adhoc reporting
The document discusses securing Cisco routers by hardening configurations based on the NSA Router Security Configuration Guide. It covers topics such as physical security of routers, defining loopback interfaces, banner configuration, blocking SYN flooding attacks using TCP intercept, tuning IP stack parameters like limiting embryonic connections and enabling TCP selective acknowledgment. It also discusses access control measures like basic authentication, AAA authentication using RADIUS/TACACS+, privilege levels, and disabling unused ports and protocols like CDP.
The document describes the steps to establish a TCP connection between two hosts (Host A and Host B) as follows:
1. Host A sends a TCP SYN packet to Host B.
2. Host B receives the SYN from Host A and sends a SYN-ACK to Host A.
3. Host A receives the SYN-ACK from Host B and sends an ACK, and the TCP socket connection is then established.
The document discusses Cisco router components, boot sequence, configuration register, backing up and restoring the IOS and configuration, Cisco Discovery Protocol, Telnet, resolving hostnames, and troubleshooting tools. It provides details on the router boot process, configuration register settings, using CDP to view neighbor information, setting Telnet passwords to access routers remotely, building a host table or using DNS for name resolution, and basic network connectivity tools like ping and trace.
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Backup and restore router configuration
1. Backup and Restore router configuration file using TFTP server with Packet
Tracer -Cisco CCNA
==================================================
Home › Networking › Backup and Restore router configuration file using TFTP
server with Packet Tracer -Cisco CCNA ›
==================================================
Here you can clearly see the router and TFTP Server in below diagram. I will
show you how to take backup of below router configuration file whose ip address
is 1.0.0.1 using TFTP Server whose ip address is 1.0.0.2.
==================================================
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R1
R1(config)#line vty 0
R1(config-line)#password redhat
R1(config-line)#login
R1(config-line)#exit
R1(config)#line console 0
R1(config-line)#password redhat123
R1(config-line)#login
R1(config-line)#exit
R1(config)#int fa0/0
R1(config-if)#ip address 1.0.0.1 255.0.0.0
R1(config-if)#no shut
==================================================
Now took a look at the running configuration using "show run" command.This is
the configuration active at the moment.
R1#show run
Building configuration...
Current configuration : 552 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
spanning-tree mode pvst
!
interface FastEthernet0/0
ip address 1.0.0.1 255.0.0.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Vlan1
no ip address
shutdown
!
ip classless
!
line con 0
password redhat123
login
2. !
line aux 0
!
line vty 0
password redhat
login
line vty 1 4
login
!
end
=========================================================
Now using show version or show flash command we can see the router ios file.
R1#show version
Cisco IOS Software, 1841 Software (C1841-ADVIPSERVICESK9-M), Version 12.4(15)T1,
RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Wed 18-Jul-07 04:52 by pt_team
ROM: System Bootstrap, Version 12.3(8r)T8, RELEASE SOFTWARE (fc1)
System returned to ROM by power-on
System image file is "flash:c1841-advipservicesk9-mz.124-15.T1.bin"
Cisco 1841 (revision 5.0) with 114688K/16384K bytes of memory.
Processor board ID FTX0947Z18E
M860 processor: part number 0, mask 49
2 FastEthernet/IEEE 802.3 interface(s)
191K bytes of NVRAM.
63488K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2102
=========================================================
R1#show flash
System flash directory:
File Length Name/status
3 33591768 c1841-advipservicesk9-mz.124-15.T1.bin
2 28282 sigdef-category.xml
1 227537 sigdef-default.xml
[33847587 bytes used, 30168797 available, 64016384 total]
63488K bytes of processor board System flash (Read/Write)
=======================================================
Now we are going to take backup of router IOS on tftp Server using below
mentioned command.
R1#copy flash tftp
Source filename []? c1841-advipservicesk9-mz.124-15.T1.bin
Address or name of remote host []? 1.0.0.2
Destination filename [c1841-advipservicesk9-mz.124-15.T1.bin]?
Writing c1841-advipservicesk9-mz.124-
15.T1.bin....!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
3. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 33591768 bytes]
33591768 bytes copied in 5.796 secs (5795000 bytes/sec)
R1#
Now copy running-config to startup-config.
R1#copy run start
Destination filename [startup-config]?
Building configuration...
[OK]
Then copy the startup-config file to tftp server machine so that we can get it
back from there whenever we need.
R1#copy startup-config tftp
Address or name of remote host []? 1.0.0.2
Destination filename [R1-confg]? R1-config
Writing startup-config...!!
[OK - 552 bytes]
552 bytes copied in 0.001 secs (552000 bytes/sec)
Now Go To TFTP Server and Verify:
in the above image you can clearly see we have successfully taken backup of
Router IOS to tftp Server and router configuration also to tftp server.
Now after Backup it's time to test recovery or restore.
i.e we will test how to restore router configuration.
Here in this tutorial we will discuss about how to restore back router
configuration from tftp server.
To test restore configuration of router first we need to first erase the
configuration on routers.
========================================================
R1#erase startup-config
Erasing the nvram filesystem will remove all configuration files! Continue?
[confirm]
[OK]
Erase of nvram: complete
%SYS-7-NV_BLOCK_INIT: Initialized the geometry of nvram
After erasing check whether you have successfully erased or not.
========================================================
R1#show startup-config
startup-config is not present
R1#
Now you can clearly see there is no output,means no configuration remains now.It
means everything has been erased.
4. Note:After reload i have a brand new router.Means all previous configuration
lost.
========================================================
R1#reload
Proceed with reload? [confirm]
System Bootstrap, Version 12.3(8r)T8, RELEASE SOFTWARE (fc1)
Cisco 1841 (revision 5.0) with 114688K/16384K bytes of memory.
Self decompressing the image :
########################################################################## [OK]
Restricted Rights Legend
--- System Configuration Dialog ---
Continue with configuration dialog? [yes/no]: no
Press RETURN to get started!
Router>
Now check your configuration after reload.
Router>enable
Router#show run
Building configuration...
Current configuration : 489 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
spanning-tree mode pvst
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Vlan1
no ip address
shutdown
!
ip classless
Now you can clearly see no ip, no hostaname, everything have been removed from
router previous configuration. so now we have to assign ip address again to have
a fresh start to connect with tftp so that we recover our configuration file
back as it was previous.
========================================================
So we are going to get back our IOS configuration file from tftp server to
router using below command.
=========================================================
5. Router#copy tftp running-config
Address or name of remote host []? 1.0.0.2
Source filename []? R1-config
Destination filename [running-config]?
Accessing tftp://1.0.0.2/R1-config........
%Error opening tftp://1.0.0.2/R1-config (Timed out)
Router#
You can clearly see that copy from tftp server failed because router interface
is down,we have to manualy up router interface
=========================================================
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int fa0/0
Router(config-if)#ip address 1.0.0.1 255.0.0.0
Router(config-if)#no shut
Now our router interface have an ip address again and port is also up now we can
start restore process.
Router#copy tftp running-config
Address or name of remote host []? 1.0.0.2
Source filename []? R1-config
Destination filename [running-config]?
Accessing tftp://1.0.0.2/R1-config....
Loading R1-config from 1.0.0.2: !
[OK - 552 bytes]
552 bytes copied in 3.003 secs (183 bytes/sec)
R1#
%SYS-5-CONFIG_I: Configured from console by console
Now check whether we have successfully able to restore our IOS configuration
file or not.
R1#show run
Building configuration...
Current configuration : 552 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
spanning-tree mode pvst
!
interface FastEthernet0/0
ip address 1.0.0.1 255.0.0.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
6. interface Vlan1
no ip address
shutdown
!
ip classless
!
!
line con 0
password redhat123
login
!
line aux 0
!
line vty 0
password redhat
login
line vty 1 4
login
!
end
--More--
You can clearly see that now our router is as it was in start.Everything come
back as it is.same password for console port,as it is configuration for telnet.
everything as it is.
Hence we have successfully restore our router configuration..
========================================================
this is configuration with
troubleshooting
for to see how
the TFTP server
running Thank you..!!!
7. interface Vlan1
no ip address
shutdown
!
ip classless
!
!
line con 0
password redhat123
login
!
line aux 0
!
line vty 0
password redhat
login
line vty 1 4
login
!
end
--More--
You can clearly see that now our router is as it was in start.Everything come
back as it is.same password for console port,as it is configuration for telnet.
everything as it is.
Hence we have successfully restore our router configuration..
========================================================
this is configuration with
troubleshooting
for to see how
the TFTP server
running Thank you..!!!