Packet Filtering:

• Packet Filtering Firewalls are deployed on the Routers which connect the Internal Network to Internet. Packet Filtering Firewalls can only be implemented on the Network Layer of IOS Model.
• Packet Filtering Firewalls work on the Basis of Rules defines by Access Control Lists. They check all the Packets …

Packet Filtering – a means of controlling access to a network. The concept is simple: determine whether a packet is allowed by comparing some basic pieces of information in the packet headers. Cisco IOS Access Control List (ACL) is one of the most used packet filters. IPChains is also a …