Unit 5.3_Firewalls (1).ppt
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Firewalls control network traffic flow and operate at multiple layers. There are different firewall environments, including simple packet filter firewalls and complex environments with multiple firewalls and proxies. A DMZ environment can be created between two firewalls, with one providing access control and the other protecting servers. Firewall types include packet filters, circuit-level, application-level, and stateful multilayer firewalls. Firewalls will continue advancing with more sophisticated attacks, and new applications supporting proxied environments.
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Firewalls.ppt
Firewalls control network traffic flow between networks and can operate at different layers. There are four main types of firewalls - packet filters at the network layer, circuit-level gateways at the session layer, application-level proxies that are application-specific, and stateful multilayer firewalls that combine aspects of the other three. Firewalls will continue advancing as attacks become more sophisticated, and may integrate virus scanning in the future.
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Firewalls control network traffic flow between networks and can operate at different layers. There are four main types of firewalls: packet filters at the network layer; circuit-level gateways at the session layer; application-level proxies that are application-specific; and stateful multilayer firewalls that combine aspects of the other three. Firewalls will continue advancing as attacks become more sophisticated.
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The document discusses different types of firewalls and their environments. It describes packet filter, circuit level, application level, and stateful multilayer firewalls. Packet filters work at the network layer and compare packets to criteria. Circuit level firewalls monitor TCP handshaking. Application proxies are application specific. Stateful multilayer firewalls combine aspects of the other three, filtering packets, checking sessions, and evaluating application layer contents. Firewalls are important for network security but cannot provide all security functions alone.
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The document discusses different types of firewalls and their environments. It describes packet filter, circuit level, application level, and stateful multilayer firewalls. Packet filters work at the network layer and compare packets to criteria. Circuit level firewalls monitor TCP handshaking. Application level firewalls are proxy gateways that are application specific. Stateful multilayer firewalls combine aspects of the other three types and filter packets at multiple layers. The document also discusses firewall environments like DMZs, intranets, extranets, and the future of firewalls advancing as attacks become more sophisticated.
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Firewalls.ppt
Firewalls control network traffic flow between networks and can operate at different layers. There are four main types of firewalls - packet filters at the network layer, circuit-level gateways at the session layer, application-level proxies that are application-specific, and stateful multilayer firewalls that combine aspects of the other three. Firewalls will continue advancing as attacks become more sophisticated, and may integrate virus scanning in the future.
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Firewalls control network traffic flow between networks and can operate at different layers. There are four main types of firewalls: packet filters at the network layer; circuit-level gateways at the session layer; application-level proxies that are application-specific; and stateful multilayer firewalls that combine aspects of the other three. Firewalls will continue advancing as attacks become more sophisticated.
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The document discusses different types of firewalls and their environments. It describes packet filter, circuit level, application level, and stateful multilayer firewalls. Packet filters work at the network layer and compare packets to criteria. Circuit level firewalls monitor TCP handshaking. Application proxies are application specific. Stateful multilayer firewalls combine aspects of the other three, filtering packets, checking sessions, and evaluating application layer contents. Firewalls are important for network security but cannot provide all security functions alone.
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The document discusses different types of firewalls and their environments. It describes packet filter, circuit level, application level, and stateful multilayer firewalls. Packet filters work at the network layer and compare packets to criteria. Circuit level firewalls monitor TCP handshaking. Application level firewalls are application-specific proxies. Stateful multilayer firewalls combine aspects of the other three, filtering packets, checking sessions, and evaluating application layer contents. The document also discusses firewall environments like DMZs, intranets, extranets, and the future of increasingly sophisticated firewall technology.
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Firewall provides security for networks by controlling access between internal and external networks. There are different types of firewalls including packet filters, application-level gateways, and circuit-level gateways. A packet filter firewall applies rules to IP packets to determine whether to forward or discard them based on information like source/destination addresses and ports. An application-level gateway provides additional security over a packet filter by requiring traffic to go through a proxy for each application/protocol. A network-based firewall protects all computers on an internal network, while a host-based firewall protects only an individual computer.
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- Firewalls work by using methods like packet filtering, proxy services, and stateful inspection to control inbound and outbound network traffic.
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- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
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- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
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- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
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This document discusses internet architecture and network security. It covers various services an organization may offer like mail, web, and FTP servers. It also discusses internal and external access to systems, including through virtual private networks (VPNs). The document outlines firewall configuration and types, including packet filtering and application layer firewalls. It describes network address translation (NAT) and private IP addresses. Finally, it discusses user VPNs and site VPNs, benefits and issues with user VPNs, and managing user VPN access.
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Firewall provides security for networks by controlling access between internal and external networks. There are different types of firewalls including packet filters, application-level gateways, and circuit-level gateways. A packet filter firewall applies rules to IP packets to determine whether to forward or discard them based on information like source/destination addresses and ports. An application-level gateway provides additional security over a packet filter by requiring traffic to go through a proxy for each application/protocol. A network-based firewall protects all computers on an internal network, while a host-based firewall protects only an individual computer.
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- Concerns with NAT including impacts to performance, fragmentation, and end-to-end connectivity.
- File Transfer Protocol (FTP) which uses separate channels for commands and data transfer between clients and servers.
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Firewalls act as barriers between internal networks and external networks like the internet. They inspect incoming and outgoing network traffic and allow or block it based on preset rules. Firewalls can be implemented as standalone hardware devices or as software installed on computers and servers. They operate at both the network and application layers, using techniques like packet filtering, network address translation, and proxy services to monitor traffic and secure networks. Well-configured firewalls help protect networks from threats like port scans, viruses, and unauthorized access.
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This document provides an overview of firewall concepts including:
- Learning objectives around firewall types, functions, and deployment of policies.
- The basic types of firewalls: packet filtering, stateful packet inspection, application proxies, and hybrids.
- Details on packet filtering firewalls including pros, cons, and how they examine packets.
- Pros and cons of application proxies.
- Background on OSI and TCP/IP models, the three-way TCP handshake, common ports/services, and the STRIDE threat model.
- How to respond to threats and build a firewall port matrix.
- An introduction to iptables and examples of basic packet filtering rules.
- An overview of the network scanning
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This document provides an overview of firewalls including:
- Firewalls are systems that permit or deny network transmissions to protect networks from unauthorized access and allow legitimate communication while protecting data integrity.
- There are different types of firewalls including network firewalls, application-layer firewalls, and hybrid firewalls.
- Firewalls work by using methods like packet filtering, proxy services, and stateful inspection to control inbound and outbound network traffic.
- Firewalls act as filters, gateways, and control points to screen traffic and regulate access between internal and external networks. Hardware and software firewalls are used to protect small offices and home networks from internet threats.
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A firewall is a system or group of systems that controls network traffic between trusted and untrusted networks according to pre-configured rules. There are different types of firewalls including packet filtering, stateful packet inspection, application-level gateways, and circuit-level gateways. Firewalls work by examining packets and filtering traffic based on criteria like source/destination addresses and ports to enforce a security policy between networks.
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This document outlines a presentation on firewalls. It begins with an introduction that defines firewalls as devices that control network traffic flow and can operate on multiple layers. It then describes different firewall environments including DMZ, VPN, intranets and extranets. The document outlines four types of firewalls - packet filters, circuit level, application level, and stateful multilayer. It also discusses what firewalls can do, the future of firewall technology, and concludes that firewalls are an important part of network security but cannot provide complete security alone.
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A firewall is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules. Packet filter is a hardware or software designed to block or allow transmission of packets based on criteria such as port, IP address, protocol.
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#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
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- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
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- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
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- Steps:
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Electric propulsion technology is widely used in many kinds of vehicles in recent years, and aircrafts are no exception. Technically, UAVs are electrically propelled but tend to produce a significant amount of noise and vibrations. Ion propulsion technology for drones is a potential solution to this problem. Ion propulsion technology is proven to be feasible in the earth’s atmosphere. The study presented in this article shows the design of EHD thrusters and power supply for ion propulsion drones along with performance optimization of high-voltage power supply for endurance in earth’s atmosphere.
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An improved modulation technique suitable for a three level flying capacitor ...
This research paper introduces an innovative modulation technique for controlling a 3-level flying capacitor multilevel inverter (FCMLI), aiming to streamline the modulation process in contrast to conventional methods. The proposed
simplified modulation technique paves the way for more straightforward and
efficient control of multilevel inverters, enabling their widespread adoption and
integration into modern power electronic systems. Through the amalgamation of
sinusoidal pulse width modulation (SPWM) with a high-frequency square wave
pulse, this controlling technique attains energy equilibrium across the coupling
capacitor. The modulation scheme incorporates a simplified switching pattern
and a decreased count of voltage references, thereby simplifying the control
algorithm.
官方认证美国密歇根州立大学毕业证学位证书原版一模一样
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留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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Software Engineering and Project Management - Introduction, Modeling Concepts...
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Building the Analysis Models: Requirement Analysis, Analysis Model Approaches, Data modeling Concepts, Object Oriented Analysis, Scenario-Based Modeling, Flow-Oriented Modeling, class Based Modeling, Creating a Behavioral Model.
Rainfall intensity duration frequency curve statistical analysis and modeling...
Using data from 41 years in Patna’ India’ the study’s goal is to analyze the trends of how often it rains on a weekly, seasonal, and annual basis (1981−2020). First, utilizing the intensity-duration-frequency (IDF) curve and the relationship by statistically analyzing rainfall’ the historical rainfall data set for Patna’ India’ during a 41 year period (1981−2020), was evaluated for its quality. Changes in the hydrologic cycle as a result of increased greenhouse gas emissions are expected to induce variations in the intensity, length, and frequency of precipitation events. One strategy to lessen vulnerability is to quantify probable changes and adapt to them. Techniques such as log-normal, normal, and Gumbel are used (EV-I). Distributions were created with durations of 1, 2, 3, 6, and 24 h and return times of 2, 5, 10, 25, and 100 years. There were also mathematical correlations discovered between rainfall and recurrence interval.
Findings: Based on findings, the Gumbel approach produced the highest intensity values, whereas the other approaches produced values that were close to each other. The data indicates that 461.9 mm of rain fell during the monsoon season’s 301st week. However, it was found that the 29th week had the greatest average rainfall, 92.6 mm. With 952.6 mm on average, the monsoon season saw the highest rainfall. Calculations revealed that the yearly rainfall averaged 1171.1 mm. Using Weibull’s method, the study was subsequently expanded to examine rainfall distribution at different recurrence intervals of 2, 5, 10, and 25 years. Rainfall and recurrence interval mathematical correlations were also developed. Further regression analysis revealed that short wave irrigation, wind direction, wind speed, pressure, relative humidity, and temperature all had a substantial influence on rainfall.
Originality and value: The results of the rainfall IDF curves can provide useful information to policymakers in making appropriate decisions in managing and minimizing floods in the study area.
Data Driven Maintenance | UReason Webinar
Discover the latest insights on Data Driven Maintenance with our comprehensive webinar presentation. Learn about traditional maintenance challenges, the right approach to utilizing data, and the benefits of adopting a Data Driven Maintenance strategy. Explore real-world examples, industry best practices, and innovative solutions like FMECA and the D3M model. This presentation, led by expert Jules Oudmans, is essential for asset owners looking to optimize their maintenance processes and leverage digital technologies for improved efficiency and performance. Download now to stay ahead in the evolving maintenance landscape.
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Unit 5.3_Firewalls (1).ppt
- 1. Firewalls
- 2. Outline • Introduction • Firewall Environments • Type of Firewalls • Future of Firewalls • Conclusion
- 3. Introduction • Firewalls control the flow of network traffic • Firewalls have applicability in networks where there is no internet connectivity • Firewalls operate on number of layers • Can also act as VPN gateways • Active content filtering technologies
- 4. Firewall Environments • There are different types of environments where a firewall can be implemented. • Simple environment can be a packet filter firewall • Complex environments can be several firewalls and proxies
- 5. DMZ Environment • Can be created out of a network connecting two firewalls • Boundary router filter packets protecting server • First firewall provide access control and protection from server if they are hacked
- 6. DMZ ENV
- 7. VPN • VPN is used to provide secure network links across networks • VPN is constructed on top of existing network media and protocols • On protocol level IPsec is the first choice • Other protocols are PPTP, L2TP
- 8. VPN
- 9. Intranets • An intranet is a network that employs the same types of services, applications, and protocols present in an Internet implementation, without involving external connectivity • Intranets are typically implemented behind firewall environments.
- 10. Intranets
- 11. Extranets • Extranet is usually a business-to-business intranet • Controlled access to remote users via some form of authentication and encryption such as provided by a VPN • Extranets employ TCP/IP protocols, along with the same standard applications and services
- 12. Type is Firewalls • Firewalls fall into four broad categories • Packet filters • Circuit level • Application level • Stateful multilayer
- 13. Packet Filter • Work at the network level of the OSI model • Each packet is compared to a set of criteria before it is forwarded • Packet filtering firewalls is low cost and low impact on network performance
- 14. Packet Filtering
- 15. Circuit level • Circuit level gateways work at the session layer of the OSI model, or the TCP layer of TCP/IP • Monitor TCP handshaking between packets to determine whether a requested session is legitimate.
- 16. Circuit Level
- 17. Application Level • Application level gateways, also called proxies, are similar to circuit-level gateways except that they are application specific • Gateway that is configured to be a web proxy will not allow any ftp, gopher, telnet or other traffic through
- 19. Stateful Multilayer • Stateful multilayer inspection firewalls combine the aspects of the other three types of firewalls • They filter packets at the network layer, determine whether session packets are legitimate and evaluate contents of packets at the application layer
- 22. Future of Firewalls • Firewalls will continue to advance as the attacks on IT infrastructure become more and more sophisticated • More and more client and server applications are coming with native support for proxied environments • Firewalls that scan for viruses as they enter the network and several firms are currently exploring this idea, but it is not yet in wide use
- 23. Conclusion • It is clear that some form of security for private networks connected to the Internet is essential • A firewall is an important and necessary part of that security, but cannot be expected to perform all the required security functions.
- 24. Thanks