Egress Filtering

Updated: 04/26/2017 by Computer Hope

With respect to computer networking, egress filtering is a method of restricting network traffic for the purpose of enforcing security. Outgoing packets are monitored as they pass through a router or gateway, and if they violate any security policies, they are denied egress: they are not allowed to exit the network.

In corporate networks that practice egress filtering, packets are usually restricted if they did not originate from a limited set of trusted internal servers. They might also be restricted by protocol — for instance, only HTTP, DNS, and e-mail packets might be allowed to leave the network, and others might be restricted.

Filter, Firewall, Network, Network terms, Security