Hello,
2008/3/13, Renaud Allard <renaud@???>:
>
>
> Zbigniew Szalbot wrote:
>
> >>
> >> Can you try to make a tcptraceroute on port 25 for the IPs of the yahoo
> >> MXes, it may give you a hint on where you are blocked.
> >
> > The issue is that no traceroute ever completes successfully:
> >
> > traceroute 209.191.118.103
> > traceroute to 209.191.118.103 (209.191.118.103), 64 hops max, 40 byte packets
> > 1 * * *
> > 2 * * *
> > 3 * * *
> > 4 * * *
> >
> > I also tried traceroute -e 209.191.118.103. Same result.
> >
> > Our Dlink router has these two enabled:
> > ping-outbound ICMP: Echo (Ping) Return ICMP Errors
> > ping-inbound ICMP: Echo (Ping)
> >
> > No host responds to traceroute commands. Thanks!
>
>
> You should also ensure that traceroute works for other IPs, just in case
> your firewall blocks them, because echo-request,replies are not
> sufficient to do a successful traceroute. If they work for other IPs,
> then, it's probably your default gateway's fault.
>
> I suggested using tcptraceroute (not traceroute) on port 25 because this
> one has more chances to give you a real hint on the route your smtp
> packets are using.
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
1 * * *
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
Destination not reached
telnet 209.191.118.103 25
Trying 209.191.118.103...
telnet: connect to address 209.191.118.103: Operation timed out
telnet: Unable to connect to remote host
I cannot use (tcp)traceroute with ANY server. For example:
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
Many thanks!
--
Zbigniew Szalbot
