Home / server / Questions / 196953
In Process
f01
Asked: 2010-11-02 07:51:21 +0800 CST

Mac OS X PPTP VPN issue ping: sendto: No buffer space available

  • 772

The VPN connects successfully but after some time the connection is unusable (VPN is used as primary gateway). Ping would reveal:

ping: sendto: No buffer space available

This looks like the same issue discussed here: http://discussions.apple.com/message.jspa?messageID=12514921#12514921

Hopefully you might have a workaround.

I have Mac OS X 10.6.4

vpn mac-osx pptp pptp-client

2 Answers

  1. I can confirm that sending constant pings to a host on the VPN will help overcome this exact issue.

    Find an ip address of a computer on the network you know will be happy to take a pings all day (a web server maybe?). Open a terminal by going into spotlight (command+space) and typing 'Terminal'. In the window that appears type (without quotes)

    ping "ip-address-here"

    so for example:

    ping 192.168.0.123

    Then just let it ping for as long as you need to keep your session open. I've found that leaving it all day has no negative affects.

    • 3

  2. I found out that the issue is most likely a UDP session timeout in my router (decreased from 120 to 90). And I have to send constant pings to a remote node (in the VPN remote network).

    • 0