Setting filters on routers might be mandatory for access control and usage tracking, but suffering a performance hit is strictly optional. We took six access routers from five vendors and loaded the ...

Filters can permit or deny virtually any kind of traffic – up to a point. Here are some basic dos and don’ts for filter usage. Filters can permit or deny virtually any kind of traffic – up to a point.

A network router plays a crucial role in how data packets travel to and from a computer to host across the Internet. Routers serve as the junction point between the computers in a network and an ...

In the last issue we started following a packet's journey from the wire up to the higher levels of network stack processing. We left the packet at the end of layer 3 processing, where IP has ...

Network geeks among you may remember my article, “Linux Socket Filter: Sniffing Bytes over the Network”, in the June 2001 issue of LJ, regarding the use of the packet filter built inside the Linux ...