ISP port blocking practice

Valdis.Kletnieks at Valdis.Kletnieks at
Fri Oct 23 05:29:01 UTC 2009

On Thu, 22 Oct 2009 22:36:13 EDT, Jon Kibler said:

>    4) Never allow traffic to ingress any network if the source address is bogus.

4a) Never flag a source address as bogus unless you can verify it is bogus
*today*, not when you installed the filter.  Out of date bogon filters are evil.

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