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Re: Border Router Question - Ingress Filtering
From: "Mitchell Rowton" <mrowton () bdo com>
Date: Thu, 13 Nov 2003 16:37:23 -0500


RFC1918 addresses could theoreticaly connect to the hosts you listed
(they would be part of "any")
Generaly you should block RFC1918, localhost, etc...  to be a nice
internet neighbor.

Mitchell Rowton

"erisk" <erisk () iinet net au> 11/12/03 02:11AM >>>
Border routers ACL In rule

Acl in
permit tcp any host ***.***.***.**6
permit tcp any host ***.***.***.**5
permit tcp any host ***.***.***.**4
permit tcp any host ***.***.***.**3
deny ip any any log

The firewall then filters on a port level.

My question is if they are denying all IPs other that what is specified
in
the list is it necessary to then add the standard spoofing deny rules
(ie
drop localhost, mulicast, RFC1918 addresses etc)? This will be taken
care of
the deny ip any any rule would it not?



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