Hello,

2008/3/13, Renaud Allard <[EMAIL PROTECTED]>:
>
>
>  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

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