OpenVPN connection terminates

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OpenVPN connection terminates

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Hi,

We are running an OpenVPN connection from our internal LAN over our PA firewall towards an external partner. Our internal IP address is NAT`et on the firewall. I dont have access to the server, so i can only provide information from the client side. I am asking this simply to see if there are any known "issues" related to OpenVPN and PA.

The tunnel is established without any issues, and stays up for about 2-3 minutes every time before it restarts. To keep the tunnel up and running without any user activity, OpenVPN sends keepalives. When i check the logs on the OPENVPN these keepalives stops being received after a short amount of time, which results in the tunnel being re-established after the defined timeout value.

We are running the tunnel in UDP mode, we have not yet tested in TCP. But here lies the question. Are there some prerequisites that needs to be addressed when running a VPN tunnel over UDP on the PA firewall ? Or is it aslong as the tunnel is established, and traffic is sent and received, the tunnel will remain up until its manually teared down on one of the endpoints ?

Regards

Stian M

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