nanog mailing list archives
Re: Cisco says attacks are due to operational practices
From: Vijay Gill <wrath () cs umbc edu>
Date: Thu, 10 Feb 2000 21:50:22 -0500 (EST)
On Thu, 10 Feb 2000, Paul Ferguson wrote:
At 06:13 PM 02/10/2000 -0800, Chris Cappuccio wrote:Filtering incoming our outgoing ports for anybody's network but your own (not your customer's) is wrong. You know specifically what apps you are running. How can you know what your customer is running or what they want to do ?Excuse me, but can you please tell me what "application" a downstream customer might be running which originates packets for traffic with source addresses which they are not advertising (or you are advertising for them)?
Trivial. I've seen several companies with two or more upstreams that are statically routed by their upstreams with a their respective blocks but default out. One might argue this is bad, but engineering is all about compromises and the real world and this happens in the real world. A lot. /vijay
Current thread:
- Re: Cisco says attacks are due to operational practices, (continued)
- Re: Cisco says attacks are due to operational practices Paul Ferguson (Feb 10)
- Re: Cisco says attacks are due to operational practices Chris Cappuccio (Feb 10)
- Re: Cisco says attacks are due to operational practices Paul Ferguson (Feb 10)
- Re: Cisco says attacks are due to operational practices Chris Cappuccio (Feb 10)
- Re: Cisco says attacks are due to operational practices John M. Brown (Feb 10)
- Re: Cisco says attacks are due to operational practices Bora Akyol (Feb 11)
- Re: Cisco says attacks are due to operational practices adrian (Feb 11)
- Re: Cisco says attacks are due to operational practices Adam McKenna (Feb 11)
- Re: Cisco says attacks are due to operational practices Stephen Sprunk (Feb 11)
- Re: Cisco says attacks are due to operational practices Paul Ferguson (Feb 11)
- Re: Cisco says attacks are due to operational practices Vijay Gill (Feb 10)
- Re: Cisco says attacks are due to operational practices John M. Brown (Feb 10)
- Re: Cisco says attacks are due to operational practices Wayne Bouchard (Feb 10)
- Re: Cisco says attacks are due to operational practices Richard Steenbergen (Feb 10)
- Re: Cisco says attacks are due to operational practices Marc Slemko (Feb 10)
- Re: Cisco says attacks are due to operational practices John M. Brown (Feb 10)
- Re: Cisco says attacks are due to operational practices Steve Sobol (Feb 10)
- RE: Cisco says attacks are due to operational practices Shawn Morris (Feb 10)
- Re: Cisco says attacks are due to operational practices Daniel Senie (Feb 10)