On Thu, 22 Oct 2009 13:22:17 -0400, Zhiyun Qian <zhiy...@umich.edu> wrote:
1). For any outgoing traffic, if the destination port is 25, then drop the packets. 2). For any incoming traffic, if the source port is 25, then drop the packets.
Inspecting outgoing traffic is generally easier to do as there's less of it. (in a consumer context, which is the only place such filtering makes any sense.)
--Ricky
