Role and Significance of Circuit Relay Firewall Full Report

Question: Discuss about theRole and Significance of Circuit Relay Firewall. Answer: Introduction Circuit Relay Firewall and SocksPackage in Secure Communication A circuit relay firewall can be defined as a firewall/ proxy server that helps the users or the organizations to establish a secured and controlled connection between the internal and external networks. In this firewall, there is a virtual circuit that is used to filter internal requests and pass them to the proxy server. After this the requests are forwarded to the internet with a change in the IP address on the data packets (Zeng, Coffey Viega, 2014). Figure 1: Interaction between the Client server and application server (Source: Zeng, Coffey Viega, 2014, pp-23) For the efficient and controlled use of FTP, SMTP and TELNET by the users inside a network, the SOCKS package provides a strong authentication mechanism by using a request and negotiation method. This layer functions between the application and transport layer. The user or the client must succeed in the connection establishment request in order to negotiate about the authentication method (Leech, 2016). After this a relay request is forwarded by the client and the evaluation of this request is done by SOCKS server. In this way the when a user needs to connect with an application server it first connects with the SOCKS proxy server, after this the proxy server connects with the application server on behalf of the client machine. It helps in securing the client machine from direct IP-reachability by the hackers or intruders. References Leech, M. (2016).Ietf.org. Retrieved 18 September 2016, from https://www.ietf.org/rfc/rfc1928.txt Zeng, Y. G., Coffey, D., Viega, J. (2014, March). How Vulnerable Are Unprotected Machines on the Internet?. InInternational Conference on Passive and Active Network Measurement(pp. 224-234). Springer International Publishing.