Zbigniew Szalbot wrote:
> > I do seem to be having some basic problem with (tcp)traceroute: > > tcptraceroute 209.191.118.103 25 > Selected device fxp0, address 192.168.16.4, port 56180 for outgoing packets > Tracing the path to 209.191.118.103 on TCP port 25, 30 hops max SNIP > > tcptraceroute tahini.csx.cam.ac.uk 25 > Selected device fxp0, address 192.168.16.4, port 49894 for outgoing packets > Tracing the path to tahini.csx.cam.ac.uk (131.111.8.192) on TCP port > 25, 30 hops max > 1 * * * > 2 * * * > 3 * * * > 4 * * * > > Although > telnet tahini.csx.cam.ac.uk 25 > Trying 2001:630:200:8080:204:23ff:fed6:b664... > telnet: connect to address 2001:630:200:8080:204:23ff:fed6:b664: No > route to host > Trying 131.111.8.192... > Connected to tahini.csx.cam.ac.uk. > Escape character is '^]'. > 220 tahini.csx.cam.ac.uk ESMTP Exim 4.69 Thu, 13 Mar 2008 09:06:19 +0000 > This more than probably means that your firewall is blocking the trick used by the traceroute utility, maybe by imposing a fixed ttl or using some protocol inspection. I'd suggest you see with the person in charge of the firewall to at least temporarily permit tcptraceroute on port 25.
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