nanog mailing list archives
Re: ICMP Blocking Woes
From: Paul Timmins <paul () timmins net>
Date: Mon, 29 Sep 2003 16:30:56 -0400
On Mon, 2003-09-29 at 16:10, Steven M. Bellovin wrote:
In message <NDBBJJPLIGJGLBKILFIHMEPLMIAA.ekgermann () cctec com>, "Eric Germann" w rites:winders does use udp instead of icmp in their tracert program, IIRC (or at least they used to). At the risk of getting my head blown off, could we say that was foresight :)No, they use icmp. Or at least that's what the XP box sitting next to me does...
So far I've seen is it uses UDP with a TTL that increments by one for each hop. The ICMP time exceeded message is returned from the interface of the router closest to you, and then windows tries to ping the hop. If it can't do this, it displays * * *. Why it needs do this rather than simply use only UDP like the rest of the world, I don't know. But leave it to microsoft to be different... -Paul -- Paul Timmins <paul () timmins net>
Current thread:
- ICMP Blocking Woes CA Windon (Sep 29)
- Re: ICMP Blocking Woes Crist Clark (Sep 29)
- Re: ICMP Blocking Woes Haesu (Sep 29)
- Re: ICMP Blocking Woes mike harrison (Sep 29)
- Re: ICMP Blocking Woes Stephen J. Wilcox (Sep 29)
- RE: ICMP Blocking Woes Eric Germann (Sep 29)
- RE: ICMP Blocking Woes CA Windon (Sep 29)
- Re: ICMP Blocking Woes Steven M. Bellovin (Sep 29)
- Re: ICMP Blocking Woes Paul Timmins (Sep 29)
- Re: ICMP Blocking Woes E.B. Dreger (Sep 29)
- Re: ICMP Blocking Woes Geo. (Sep 30)
- Re: ICMP Blocking Woes Eric Kagan (Sep 30)
- Re: ICMP Blocking Woes Eric Kagan (Sep 30)
- Re: ICMP Blocking Woes Anthony Cennami (Sep 30)
- RE: ICMP Blocking Woes Eric Germann (Sep 29)
- Re: ICMP Blocking Woes bdragon (Sep 30)
- Re: ICMP Blocking Woes Crist Clark (Sep 30)
- Re: ICMP Blocking Woes John Kristoff (Sep 30)
- Re: ICMP Blocking Woes Crist Clark (Sep 30)
- Re: ICMP Blocking Woes Kevin Oberman (Sep 29)