One-Way Audio via VPN on VOIP
Posted on 2010-11-10
I have an issue with a new Dual-WAN device we just put in, an XRoads EdgePro 100. With the EdgePro, we use a form of OpenVPN for the VPN client.
We're experiencing an issue where remote users will get one-way audio, and the only way to resolve it is to remove all connections to their router, start XLite and force it to not find a network, then reconnect the network connections, dial VPN, then have XLIte connect to their VOIP server (Ensercle).
Once they do all that, we now get audio. After running a wireshark capture while the one-way audio issue is happening, it appears that on the users' machines, XLIte is sending the outbound packets to their network adapter (gets lost), and the inbound packets are coming through the VPN virtual adapter (can hear audio).
I've worked with the router and done all I can to force VOIP traffic out one WAN connection, and the engineers at XRoads tell me there is no NAT taking place on the VPN connection, that it's a straight connection.
All other services like RDP, and email all work fine over these VPN connections. The one-way audio is the one sticky point we can't seem to resolve.
As the XLite is free software, there is not much to configuring it. Is there some way to force XLite to send and receive traffic from a specific adapter? Or, is there something on the XRoads router that I'm missing?
Any guidance or assistance that can be provided would be much appreciated. This is an issue that we are running out of time on, so I'm going to offer max points on this.
Thanks Experts, I really look forward to hearing back on this.