nanog mailing list archives
Re: Bogon list
From: Richard A Steenbergen <ras () e-gerbil net>
Date: Thu, 6 Jun 2002 21:08:34 -0400
On Thu, Jun 06, 2002 at 06:34:48PM -0400, Stephen Griffin wrote:
Do you: 1) Not believe in PMTU-D
Yes.
2) Not believe in filtering RFC1918 sourced traffic at enterprise boundaries
Yes.
I would love if RFC1918 were adhered to such that L3 packet-passing devices either weren't numbered out of those blocks, or allowed what juniper allows with the ability to select the ip address with which packets sourced by the L3 packet-passing device sent traffic (other than primary ip on destination interface). The latter would permit intra-enterprise use of RFC1918 addresses, while still conforming with RFC1918. Failing that, use of RFC1918 addresses in places where inter-provider packets get RFC1918 sources, is a violation of RFC1918.
Why? Why do you care about your inter-device link IPs other than for traceroute results? Please, someone tell me another reason why they're important. :) There are very legitimate reasons for wanting that communication to be one-way, for example DoS attacks directed at the IPs which show up in traceroutes. But using RFC1918 IPs is not practical for large networks, since you can't communicate any DNS information about those IPs. Even if there was an option to source ICMP from loopbacks (which I support, the OPTION is nice), I wouldn't use it. The devices along the path is far less important than the actual path, and you would immediately lose the ability to see which of multiple circuits is being taken between two endpoints. Loopbacks are better used for administrative access. -- Richard A Steenbergen <ras () e-gerbil net> http://www.e-gerbil.net/ras PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3 D8 14 36 FE B6)
Current thread:
- Re: Bogon list, (continued)
- Re: Bogon list Aditya (Jun 04)
- Re: Bogon list Randy Bush (Jun 04)
- Re: Bogon list David McGaugh (Jun 04)
- Re: Bogon list Leo Bicknell (Jun 04)
- RE: Bogon list Kurt Erik Lindqvist (Jun 05)
- Re: Bogon list Rob Thomas (Jun 04)
- RE: Bogon list Barry Raveendran Greene (Jun 04)
- Re: Bogon list Sean M. Doran (Jun 04)
- Re: Bogon list Joe Abley (Jun 04)
- Re: Bogon list Stephen Griffin (Jun 06)
- Re: Bogon list Richard A Steenbergen (Jun 06)
- Re: Bogon list John Payne (Jun 06)
- Re: Bogon list Stephen J. Wilcox (Jun 07)
- Re: Bogon list Greg A. Woods (Jun 07)
- Re: Bogon list Chris Woodfield (Jun 07)
- Re: Bogon list Stephen J. Wilcox (Jun 08)
- Re: Bogon list Stephen Griffin (Jun 07)
- Re: Bogon list Greg A. Woods (Jun 07)
- Message not available
- Re: Bogon list Daniel Senie (Jun 07)
- Re: Bogon list Stephen J. Wilcox (Jun 07)