OCS (SIP) over OpenVPN

I have a client whose users are trying to use OCS audio/video through their OpenVPN connections (they're connecting to an Untangle server). They'll be able to connect and use OCS for a few minutes without a hitch, and then the OpenVPN will disconnect. They connect for a few more minutes, and it happens again. I have not yet been able to collect any logs on the client machines. The server logs show multiple disconnections.

We've already tried adding bypass rules for the VPN IP range.

Any other suggestions?
getairAsked:
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DarinTCHSenior CyberSecurity EngineerCommented:
I had a similar issue with the OpenVPN
We switched to a VPN from our firewalls
we tested 2
Enterpise - Juniper
Homeowner - Linksys
now both work and I stopped troubleshooting OpenVPN
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
Does the connection only drop if there is no traffic? In that case you should include the ping option to keep the connection active.
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getairAuthor Commented:
No, there is most definitely traffic when it drops. It was occurring, as I said, right in the middle of SIP video sessions. However, it looks like we've now had it happen in non-SIP situations, so it may be more of a general OpenVPN problem than an OCS/SIP problem. I'll update with more information when I have it.
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
Are you working with UDP or TCP for OpenVPN?
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getairAuthor Commented:
At this point, we are no longer dealing with this issue. It appears that it wasn't exclusively OCS/SIP related. Thanks everyone for your comments!
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