[afnog] Cannot connect to remote pop3 server

[Mark Tinka]

On Wednesday 18 February 2009 09:26:58 pm Shepherd Magumo 
wrote:

> ISPs are saying there is nothing they can do because this
> is a global issue ( South Africa).

You mean ISP's from .uk are saying this, or ISP's from .za?

> 1. Anyone else getting similar connect error elsewhere?

Testing from Malaysia:

a) I can ping:

[tinka at nms ~]$ ping pop3.zonnet.nl
PING pop3.zonnet.nl (62.58.50.236): 56 data bytes
64 bytes from 62.58.50.236: icmp_seq=0 ttl=112 time=349.516 
ms
64 bytes from 62.58.50.236: icmp_seq=1 ttl=112 time=349.467 
ms
64 bytes from 62.58.50.236: icmp_seq=2 ttl=112 time=349.711 
ms
64 bytes from 62.58.50.236: icmp_seq=3 ttl=112 time=349.698 
ms
^C
--- pop3.zonnet.nl ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 
349.467/349.598/349.711/0.108 ms
[tinka at nms ~]$

b) I can traceroute (but it's filtered, I think):

[tinka at nms ~]$ traceroute pop3.zonnet.nl
traceroute to pop3.zonnet.nl (62.58.50.236), 64 hops max, 52 
byte packets
 1  gi-2-0-11.edge-gw-1-kul-pip.my.globaltransit.net 
(124.158.236.61)  0.392 ms  0.384 ms  0.362 ms
 2  gi-1-0-0-0.cr-gw-2-kul-pip.my.globaltransit.net 
(61.11.210.130)  0.667 ms  3.015 ms  3.636 ms
 3  gi-0-1-0-0.br-gw-2-kul-pip.my.globaltransit.net 
(61.11.211.253)  0.666 ms  0.676 ms  0.516 ms
 4  GBT-0004.GW1.KUL2.asianetcom.net (202.147.33.153)  0.511 
ms  0.385 ms  0.356 ms
 5  gi15-0.gw2.sin1.asianetcom.net (203.192.144.34)  6.907 
ms  6.920 ms  6.754 ms
 6  gi0-1-2.cr3.hkg3.asianetcom.net (202.147.16.233)  37.483 
ms  37.354 ms  37.645 ms
 7  po14-1-1.cr1.nrt1.asianetcom.net (202.147.0.41)  84.294 
ms  84.615 ms  84.756 ms
 8  po0-1-1.gw3.lax1.asianetcom.net (202.147.61.181)  
195.985 ms  196.478 ms  195.680 ms
 9  ge-2-0-0-207.ip.tiscali.net (77.67.69.89)  198.323 ms  
198.744 ms  198.664 ms
10  xe-1-2-0.par20.ip.tiscali.net (89.149.185.113)  335.149 
ms  336.810 ms  336.618 ms
11  cor1-core.gigabiteth4-0.swip.net (213.200.85.30)  
336.227 ms  335.794 ms  335.458 ms
12  cbv1-core-1.gigabiteth3-0-0.swip.net (130.244.49.69)  
365.401 ms  342.169 ms  349.881 ms
13  ams16-core-1.pos0-0-0.swip.net (130.244.205.146)  
342.176 ms  342.570 ms  342.162 ms
14  br01tc2.versatel.net (130.244.200.130)  357.761 ms  
357.772 ms  357.919 ms
15  ge-1-1-0-664.ncr01asd2.versatel.net (212.53.18.17)  
358.470 ms
    ge-1-2-0-668.ncr01asd2.versatel.net (212.53.18.25)  
352.198 ms
    ge-1-1-0-666.ncr01asd2.versatel.net (212.53.18.1)  
352.010 ms
16  212.53.18.193 (212.53.18.193)  352.631 ms  352.048 ms  
352.459 ms
17  217.16.47.193 (217.16.47.193)  352.298 ms  352.510 ms  
352.145 ms
18  * * *
19  * * *
^C
[tinka at nms ~]$

c) I can connect to the POP3 service:

[tinka at nms ~]$ telnet pop3.zonnet.nl 110
Trying 62.58.50.236...
Connected to pop3.zonnet.nl.
Escape character is '^]'.
+OK POP3 Ready 10.170.1.153 0001fe2f
quit
+OK QUIT
Connection closed by foreign host.
[tinka at nms ~]$

> 2. Can i work around this problem via some traffic
> tunneling of some sort via the UK server?

Only as a workaround.

Have you tried pinging/tracerouting from .za and see what 
happens? tcptraceroute might help you here also.

Have you verified that your ISP's in .za (and their 
upstreams) aren't filtering access to port 110 on their 
transit/peering links?

Cheers,

Mark.
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