[j-nsp] ScreenOS bgp filtering

Mark Kamichoff prox at prolixium.com
Thu Feb 21 09:45:45 EST 2008


On Tue, Feb 19, 2008 at 05:24:29AM +0200, Screen OS wrote:
> I have a screenOS device multihomed to two ISPs using BGP.  I would
> like to only receive default route from one of them.  When I configure
> an ACL to permit 0.0.0.0/0 screenOS treat this as all routes and not
> as the exact match of default route.  How can I configure an ACL to
> only allow default route?

Yeah, 0/0 will match everything.  ScreenOS has a special option to match
on 0/0 exact:

set access-list 1 permit default-route 1

- Mark

-- 
Mark Kamichoff
prox at prolixium.com
http://prolixium.com/
Rensselaer Polytechnic Institute, Class of 2004
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