nanog mailing list archives
RE: private ip addresses from ISP
From: "Brian Johnson" <bjohnson () drtel com>
Date: Tue, 23 May 2006 10:22:35 -0500
-----Original Message----- From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On Behalf Of Joe Maimon Sent: Tuesday, May 23, 2006 10:15 AM To: Robert Bonomi Cc: nanog () nanog org Subject: Re: private ip addresses from ISP Robert Bonomi wrote:TTL-E messages _do_ have legitimate function in network management. TTL-E messages _can_ originate from RFC1918 space,addressed to 'publicinternet' addresses. Usefully, and meaningfully. Everhear of 'traceroute'?Ever use it where packets went across a network usingRFC1918 internally?Ever had a route die _between_ two RFC1918 addressed nodeson somebody elsesnetwork?I guess this means that providers who utilize rfc1918 along their hops should make an effort to ensure these addresses are not used for icmp messages or translate these addresses when they source icmp. Understandably, translation on providers networks is not always feasible. A feature on routers that sourced icmp packets to be told specificaly which address of the router to source it from would also help.
In the Cisco world, I thought that the source would always be the interface that replies to the ICMP packet. That seems to be good form to me. Where am I going wrong?
Current thread:
- Re: private ip addresses from ISP, (continued)
- Re: private ip addresses from ISP Patrick W. Gilmore (May 23)
- Re: private ip addresses from ISP Richard A Steenbergen (May 23)
- Re: private ip addresses from ISP sthaug (May 23)
- Re: private ip addresses from ISP Patrick W. Gilmore (May 23)
- Re: private ip addresses from ISP Daniel Senie (May 23)
- RE: private ip addresses from ISP Frank Bulk (May 23)
- Re: private ip addresses from ISP Joe Maimon (May 23)
- RE: private ip addresses from ISP Brian Johnson (May 23)
- Re: private ip addresses from ISP Joe Maimon (May 23)
- Re: private ip addresses from ISP Joseph S D Yao (May 23)
- Re: private ip addresses from ISP Joe Maimon (May 23)
- Re: private ip addresses from ISP Joseph S D Yao (May 23)
- Re: private ip addresses from ISP Joseph S D Yao (May 23)
- Re: private ip addresses from ISP Michael . Dillon (May 24)
- Re: private ip addresses from ISP Warren Kumari (May 24)
- Re: private ip addresses from ISP Valdis . Kletnieks (May 24)
- Re: private ip addresses from ISP Edward B. DREGER (May 24)