BGP TTL check in 12.3(7)T

Thu Apr 8 16:40:06 UTC 2004

> Blaine Christian wrote
> http://www.faqs.org/rfcs/rfc3682.html
> I agree that it is not a panacea...  But, you must admit,
> it provides an incredible level of comfort. It would be
> wonderful to only allow internally generated traffic to
> talk to the core of your network with a simple TTL filter.
> Versus anti-spoofing filters from hell.

That's not the way I see this at all. I look at it as a good complement
to anti-spoofing filters as part of defense in depth, in case said
filters get SNAFUed. My primary line of defense will remain ACLs.

Michel.