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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: private ip addresses from ISP
> -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Joe Maimon > Sent: Tuesday, May 23, 2006 10:15 AM > To: Robert Bonomi > Cc: [email protected] > 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 'public > > internet' addresses. Usefully, and meaningfully. Ever > hear of 'traceroute'? > > Ever use it where packets went across a network using > RFC1918 internally? > > Ever had a route die _between_ two RFC1918 addressed nodes > on somebody elses > > network? > > 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? > >
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