Hello again,
2008/3/13, Renaud Allard <renaud@???>:
>
>
> 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.
I have eventually connected my box straight to the modem and:
1/ I am still getting timeouts to Yahoo (though they claim not to block us)
2/ I can at least use (tcp)traceroute and here are some logs. Can you
help me interpret them? Am I right in thinking that the connection
times out somewhere at yahoo border machines?
If I remeber correctly, this one is from tcptraceroute a.mx.mail.yahoo.com 25:
1 cxw209.internetdsl.tpnet.pl (83.19.156.209) 9.729 ms 9.325 ms 9.994 ms
2 byd-ru1.idsl.tpnet.pl (213.25.2.164) 12.584 ms 86.020 ms 9.611 ms
3 z.byd-ru1.do.byd-r2.tpnet.pl (213.25.5.165) 9.702 ms 9.718 ms 9.981 ms
4 so-0-3-0.war-r4.tpnet.pl (194.204.175.221) 12.253 ms 12.686 ms 12.306 ms
5 po8-0.nykcr2.NewYork.opentransit.net (193.251.251.69) 126.360 ms
149.051 ms 351.378 ms
6 gi0-0-0.nykcr3.NewYork.opentransit.net (193.251.240.230) 119.395
ms 120.847 ms 119.446 ms
7 po10-0.ashcr2.Ashburn.opentransit.net (193.251.243.1) 121.575 ms
121.886 ms 121.404 ms
8 ge-0-1-0-0.atlcr3.Atlanta.opentransit.net (193.251.243.178)
136.551 ms 136.275 ms 172.029 ms
9 pos0-0-2-0.daltr1.Dallas.opentransit.net (193.251.241.17) 158.566
ms 158.634 ms 158.842 ms
10 so-3-0-0-0.dalcr2.Dallas.opentransit.net (193.251.241.18) 157.308
ms !A 157.348 ms !A 156.995 ms !A
and this one from traceroute a.mx.mail.yahoo.com
1 cxw209.internetdsl.tpnet.pl (83.19.156.209) 0.579 ms 0.362 ms 0.197 ms
2 byd-ru1.idsl.tpnet.pl (213.25.2.164) 9.273 ms 8.890 ms 8.509 ms
3 z.byd-ru1.do.byd-r2.tpnet.pl (213.25.5.165) 8.337 ms 8.410 ms 8.022 ms
4 so-0-3-0.war-r4.tpnet.pl (194.204.175.221) 12.273 ms 12.566 ms 12.598 ms
5 po8-0.nykcr2.NewYork.opentransit.net (193.251.251.69) 126.506 ms
126.572 ms 126.242 ms
6 po11-0.nykcr3.NewYork.opentransit.net (193.251.242.210) 120.184
ms 119.696 ms 119.837 ms
7 po10-0.ashcr2.Ashburn.opentransit.net (193.251.243.1) 129.183 ms
121.397 ms 128.014 ms
8 so-1-0-0-0.atlcr3.Atlanta.opentransit.net (193.251.240.154)
135.362 ms 209.650 ms 204.099 ms
9 pos0-1-0-0.daltr1.Dallas.opentransit.net (193.251.241.34) 155.429
ms 157.005 ms 156.540 ms
10 so-4-0-0-0.dalcr2.Dallas.opentransit.net (193.251.241.33) 154.635
ms 155.422 ms 155.229 ms
11 POS5-0.GW5.DFW7.ALTER.NET (157.130.138.121) 155.213 ms 155.277
ms 155.584 ms
12 0.so-0-0-0.XL1.DFW7.ALTER.NET (152.63.101.34) 154.989 ms 155.496
ms 153.983 ms
13 0.so-3-0-0.XL3.DFW13.ALTER.NET (152.63.98.90) 155.185 ms 155.737
ms 155.086 ms
14 0.so-6-0-0.BR1.DFW13.ALTER.NET (152.63.98.65) 156.334 ms 155.573
ms 155.131 ms
15 204.255.168.86 (204.255.168.86) 156.344 ms 154.784 ms 155.407 ms
16 tbr2.dlstx.ip.att.net (12.123.16.30) 158.997 ms 157.998 ms 157.823 ms
17 12.122.100.77 (12.122.100.77) 155.311 ms 156.271 ms 186.044 ms
18 12.86.20.18 (12.86.20.18) 157.491 ms 158.017 ms 158.116 ms
19 ge-1-1-0-p110.msr2.mud.yahoo.com (216.115.104.109) 157.860 ms
ge-1-1-0-p100.msr1.mud.yahoo.com (216.115.104.105) 155.660 ms
ge-0-1-0-p110.msr2.mud.yahoo.com (216.115.104.101) 158.027 ms
20 ge-8-1.bas-g2.mud.yahoo.com (68.142.193.215) 158.201 ms
ge-9-1.bas-g2.mud.yahoo.com (68.142.193.223) 155.621 ms
ge-8-1.bas-g1.mud.yahoo.com (68.142.193.213) 159.981 ms
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
31 * * *
32 * * *
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48 * * *
49 * * *
50 * * *
51 * * *
52 * * *
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54 * * *
55 * * *
56 * * *
57 * * *
58 * * *
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60 * * *
61 * * *
62 * * *
63 * * *
64 * * *
Thank you very much in advance!
--
Zbigniew Szalbot
