Friday, June 30, 2006

Connections Freeze over Linux PPTP Client

Because my last "howto" post about an Eclipse issue ended up helping someone, I'm posting another.

I have PPTP set up on my Linux-based desktop, but I had been having no end of problems with large file transfers or long-running connections over it. They appeared to freeze up or die halfway through.

Unfortunately this was all happening when I was trying to access a remote CVS server. After I spent two hours diagnosing the poor CVS server I determined that there wasn't a bloody thing wrong with it. Turning my attentions locally, I thought I'd see if there were any troubleshooting items related to pptpclient. Turns out there are:

Connections Freeze over Linux PPTP Client

In my case, it was that MTU negotiation was busted. Adding "mtu 1400" to my peer file in /etc/ppp/peers appears to have solved all issues. Huzzah!

Hopefully my adding another descriptive, keyword-laden link to the world will help others find this more quickly.


  1. Friend, you saved my life! After weeks of totally confusing behaviour and at times excruciatingly slow performance, I added this to the peers file and kapow! Totally fixed. Hurra!

    Thank you!

  2. Then I guess it was worth posting this after all!