nanog mailing list archives

Re: Egress filters dropping traffic


From: Saku Ytti <saku () ytti fi>
Date: Mon, 1 Jul 2013 10:24:40 +0300

On (2013-06-30 22:04 +0530), Glen Kent wrote:

Under what scenarios do providers install egress ACLs which could say for
eg.

1. Allow all IP traffic out on an interface foo if its coming from source
IP x.x.x.x/y
2. Drop all other IP traffic out on this interface.

Question seems to be 'when do you need to drop packets', I'm sure 10
different people would give 10 different use-cases.

One use-case for this particular ACL is that the interface is used for MGMT
only, so you allow NMS network and drop everything else.

-- 
  ++ytti


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