Openvpn hanging?

Timothy Murphy gayleard at eircom.net
Tue Sep 10 12:05:39 UTC 2013


fedora wrote:

>> I'm having a curious problem communicating with a remote site of mine.
>> I can access the site with "ssh -Y alfred-vpn" without any problem.
>> But then any command, eg cat, vim, tail,
>> that gives more than a minimal response,
>> causes the connection to hang, that is, to cease accepting any input,
>> and I see no way to revive the connection
>> except to kill the sshd entry from another ssh connection to the site,
>> or else just to close the local window.
>>
>> For example, "sudo tail -9 /var/log/messages" works,
>> but not if I replace 9 with 20.[tim at alfred ~]$ ifconfig tun0

> Different MTU and fragmentation disabled?

Thanks for your response.
But the MTU seems to be 1500 at both ends
(unless the modem at the remote end can change it?)

On the remote computer:
------------------------
[tim at alfred ~]$ ifconfig tun0
tun0      Link encap:UNSPEC  HWaddr 
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:192.168.6.10  P-t-P:192.168.6.9  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:1716 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1120 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:146759 (143.3 KiB)  TX bytes:235923 (230.3 KiB)
------------------------
On the home computer:
------------------------
[tim at grover ~]$ ifconfig tun0
tun0      Link encap:UNSPEC  HWaddr 
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          inet addr:192.168.6.1  P-t-P:192.168.6.2  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:16698 errors:0 dropped:0 overruns:0 frame:0
          TX packets:18248 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:1758027 (1.6 MiB)  TX bytes:6059276 (5.7 MiB)
------------------------

When I try to scp a file from the remote site
I get the message "pipe failed".

-- 
Timothy Murphy  
e-mail: gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin 2, Ireland




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