Information System SecurityNo Name Matric No

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Static Packet Filtering

• One of the function by fire wall• It does packet filtering base on one current

packet• Control in and outgoing access • It filter base on ip address of the source and

the destination of the packet only

Dynamic Packet Filtering

• Dynamic packet filtering is a firewall • Dynamic can do any work.• Dynamic packet filtering would consider

whether a connection was started from inside the secure part of the network and only allow a connection response from the internet if the packet appeared to be a response to the request.

proxy passed the network traffic• Unlike its packet-filtering counterparts,

a proxy does not route any traffic. In fact, a properly configured proxy has all routing functionality disabled. As its name implies, the proxy stands in or speaks for each system on each side of the firewall.For an analogy, think of two people speaking through a language interpreter. Although it is true that these two people are carrying on a conversation, they never actually speak to each other. All communication passes through the interpreter before being passed on to the other party. The interpreter might have to clean up some of the language used or filter out comments or statements that might seem hostile.

comparison between static packet filtering dynamic packet filtering and proxy

• A proxy basically does the following:

• Receives a request from a client inside the firewall

• Sends this request to the remote server outside of the firewall

• Reads the response• Sends it back to the client