VPN connection in Ubuntu Intrepid fails?
by Lennart on Mar.19, 2009, under Internet
I had this problem for a longer time now: When I established a VPN connection on Ubuntu Intrepid it just failed after a few seconds or minutes. This did not happen in the earlier Ubuntu versions.
The error in the syslog was: “nm-pptp-service-9656 warn[decaps_gre:pptp_gre.c:331]: short read (-1): Message too long”
There is a very simple solution for that: Just set the MTU of your VPN connection to 1412 and the connection should stay alive! (sudo ifconfig ppp0 mtu 1412)


March 25th, 2009 on 8:27 am
Why do you have to decrease the packet size of TCP packets? In generally, there most problems with MTU’s, because there too big and the packets will be fragmented!
February 13th, 2010 on 6:58 pm
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