OpenVPN issue with SIP/UDP - Printable Version +- Yealink Forums (http://forum.yealink.com/forum) +-- Forum: IP Phone Series (/forumdisplay.php?fid=4) +--- Forum: T4x Series (/forumdisplay.php?fid=31) +--- Thread: OpenVPN issue with SIP/UDP (/showthread.php?tid=44664) |
OpenVPN issue with SIP/UDP - fredoch - 11-10-2020 03:47 PM Hi, I have to connect T42/T46 phones over OpenVPN for our Switchboard and Helpdesk. The VPN Connection works fine, but the phones are not able to register on the SIP Server when using SIP on UDP. SIP on TCP works fine, but is not compliant to our Call-center. Any Idea why SIP is not registering on UDP? I tried many options on the VPN server, without any results (OpenVPN over UDP and over TCP, OpenVPN Clients can join the other clients or not, all clients in one /24 subnet, or every client in a /30 subnet...) Here 2 vpn.cfg, with both configurations, SIP is only registering when on TCP. I also tried to play with the send/receive Buffer, which didn't help... Initial configuration (working fine with SIP/TCP, no register on UDP, tested over UDP and TCP): dev tun persist-tun persist-key cipher AES-128-CBC auth SHA256 tls-client client resolv-retry infinite remote sub.mydomain.ch 1194 udp ca /config/openvpn/keys/ca.crt cert /config/openvpn/keys/client1.crt key /config/openvpn/keys/client1.key tls-auth /config/openvpn/keys/ta.key 1 remote-cert-tls server My last configuration, also tested over UDP an TCP, in TUN and TAP mode (no one is working with SIP/UDP): dev tap persist-tun persist-key cipher AES-128-CBC auth SHA256 tls-client client resolv-retry infinite remote sub.mydomain.ch 1195 tcp ca /config/openvpn/keys/ca.crt cert /config/openvpn/keys/client1.crt key /config/openvpn/keys/client1.key tls-auth /config/openvpn/keys/ta.key 1 remote-cert-tls server nobind route-delay 2 redirect-gateway passtos Do you have any Idee why the phones doesn't register over UDP? Thanks PS: We are using Firmware version 66.81.0.110 |