ISP port blocking practice
Ricky Beam
jfbeam at gmail.com
Thu Oct 22 21:37:03 UTC 2009
On Thu, 22 Oct 2009 13:22:17 -0400, Zhiyun Qian <zhiyunq at 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
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