4 thoughts on - SIP Connections Over OpenVPN Connection Get One-way Voice.

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    —-_com.samsung.android.email_1038770388996490

  • Sent from my iPhone

    Set it as a proxy server in your sip phone client, we found using the tun ip on the vpn server works, we keep the actual asterisk address as the sip server and use the tun ip as the proxy server

    Asterisk is probably already bound to all the addresses netstat -nupl should show you the addresses it’s listening on for udp, if it says 0.0.0.0 it means all addresses

    sudo tcpdump -i tun0 -s0 -A udp port 5060

    Should show you the sip messages going through the tunnel and you can check the reply addresses

  • If the Asus network is 192.168.1.0/24, and the phone is registering as
    10.0.8.6, it looks like NAT is taking place. Would your asterisk server know how to route traffic to 192.168.1.0/24?

    I’ve always used site-to-site OpenVPN tunnels where the vpn’s terminate on the gateway for both the phones and the asterisk server. I’ve always had rock solid connections between phones and Asterisk.

  • Hi Ernie,

    When one-way audio appear (no matters if there is a VPN or NAT server on the diagram) I simply :

    * Enable SIP debug on Asterisk server. Excecute ‘sip set debug ip x.x.x.x’
    on Astrisk CLI, where x.x.x.x is the IP of the phone or SIP peer you want to debug.

    * Make a test call and replicate the issue.

    * Stop debug with ‘sip set debug off’.

    * Follow the SIP conversation. Verify that the INVITE message has the correct IP on the contact field and any other related fields.

    * On SDP handshake, verify that the ports where the sound is send, is correct.

    Normally, one-way audio is faced when one audio stream (example the called audio) is send to the correct IP and Port destination, on the other audio stream (example the caller audio) don’t.

    Last, if Asterisk is ‘behind’ another server, you need tell Asterisk what is the external IP so it can inform this IP to your clients.

    If you dont want to follow the SIP conversation on plain text, you can make a packet capture on the Asterisk server, instead of SIP debug.

    El 19 abr. 2017 16:38, “Mark Wiater” escribió:

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