When connecting over VPN tunnel, both of my VOIP accounts (from different SIP providers) fail to connect. I've tunneled to a couple different servers, both of which work with VOIP just fine from a workstation.

Has anyone successfully connected VOIP over VPN?

After a search of the forum, I'm surprised to be the only one reporting this, because it's been broken as long as I remember, and would seem to be a somewhat common need. It has failed with multiple different voip providers, and vpn providers, strongly suggesting the there's an issue on the client platform side.

Is there any way to see a detailed log of why the VOIP connection fails? I'm not sure how to go about diagnosing this.