Forum Discussion

Nimbostratus

Aug 15, 2014

SSL VPN Disconnect Issue

We currently have an issue with our SSL VPN connection disconnecting on random intervals. I do have a open support case and unfortunately not making any drastic headway, so reaching out here to see i...

Matti_63169
Jun 02, 2016
Check the DNS settings of the F5 and make sure it can resolve the sslvpn fqdn.

Background: We had similar issues, the PPP tunnel kept randomly closing and opening a new one, which caused the clients to reconnect, which in turn caused traffic not flowing while the PPP tunnel did a new handshake.

There were no evidence in the LTM log why this happens, but the Edge client log revealed that DNS lookup for the APM endpoint (LTM VIP) didn't resolve. The client machine actually could resolve it, but the F5 itself couldn't. After changing the DNS servers in F5 to ones that resolved correctly the problem seems to have been solved.

walou12_113339

Nimbostratus

Hi, Are you running full tunnels or split tunnels?. We had a similar problem with split tunnels, some clients would disconnect after 10 min. Logged a support call and did a lot of debugging, it appeared to be triggered by some route change event on the client. but we never got to the bottom of it and went back to full tunnel.