nanog mailing list archives
Re: ICMP Blocking Woes
From: "Eric Kagan" <ekagan () axsne com>
Date: Tue, 30 Sep 2003 07:04:52 -0400
WindowsNT tracert.exe uses 92 byte icmp packets. There is a modified
version
that uses a smaller sized icmp packet at http://www.nthelp.com/NT6/tracert_broken.htm that works fine on Windows 2000.
So if tracert1 doesn't work, would that mean Comcast is actually blocking all ICMP ? I have been told they are only blocking 135-139, 4444 I get the same results with tracert and tracert1 (below) D:\Temp>ver Microsoft Windows 2000 [Version 5.00.2195] D:\Temp>tracert1 www.advil.com Tracing route to www.advil.com [164.109.5.98] over a maximum of 30 hops: 1 20 ms 10 ms 10 ms c-24-218-168-1.ne.client2.attbi.com [24.218.168.1] 2 20 ms 10 ms 10 ms 24.62.0.245 3 * * * Request timed out. 4 * * * Request timed out. 5 * * * Request timed out. 6 * * * Request timed out. 7 * * * Request timed out. D:\Temp>tracert www.advil.com Tracing route to www.advil.com [164.109.5.98] over a maximum of 30 hops: 1 20 ms 10 ms 10 ms c-24-218-168-1.ne.client2.attbi.com [24.218.168.1] 2 10 ms 10 ms 20 ms 24.62.0.245 3 * * * Request timed out. 4 * * * Request timed out. 5 * * * Request timed out. 6 * ^C Eric
Current thread:
- Re: ICMP Blocking Woes, (continued)
- 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)