Packet Filter Firewall and its advantages and disadvantages

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Networking - Explain Packet Filter Firewall. Advantages and disadvantages of Packet Filtering - Jan 30, 2010 at 18:00 pm by Vidya Sagar

Explain Packet Filter Firewall. Advantages and disadvantages of Packet Filtering. 

Packet filtering firewalls are part of a router which work at the network level of the OSI model or the IP layer of TCP/IP. In this firewall every packet is compared to a set of criteria prior to forwarding it. The firewall can drop the packet; forward the packet to originator depending on the packet and the criteria.

The advantage of packet filter firewall is “low cost and low impact on network performance”. 

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