nanog mailing list archives
Re: ICMP weirdness
From: Bill Stewart <nonobvious () gmail com>
Date: Mon, 18 Oct 2004 19:32:43 -0700
AT&T normally rejects bogons such as RFC1918, urpf-detected forgeries from customers, traffic pointed at internal network routers, etc. However, AT&T's network does support MPLS, so if InsightBB is part of the Comcast cloud, it may be that this _looks_ like the public internet but is really an MPLS private network cloud that happens to use similar addresses and only reaches the Internet through gateways, in spite of being carried on much of the same hardware. Disclaimer: As a Comcast stockholder, I probably should know their architecture and whether or not InsightBB is part of their company, but all I really know about it is that cable companies have a history of doing funky things, particularly with NAT, which is one of many reasons I use DSL at home instead of cable modems. And this posting is strictly my private speculation, not my employer's. Bill Stewart
Current thread:
- ICMP weirdness Jim Popovitch (Oct 18)
- Re: ICMP weirdness Crist Clark (Oct 18)
- Re: ICMP weirdness Daniel Senie (Oct 18)
- Re: ICMP weirdness Bill Stewart (Oct 18)
- Re: ICMP weirdness Daniel Senie (Oct 18)
- <Possible follow-ups>
- Re: ICMP weirdness Jim Popovitch (Oct 18)
- Re: ICMP weirdness Alon Tirosh (Oct 18)
- Re: ICMP weirdness Robert Bonomi (Oct 18)
- Re: ICMP weirdness Crist Clark (Oct 18)