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    SIP Phone registers no audio...

    Scheduled Pinned Locked Moved IT Discussion
    sipvoiptelephonyyealinkyealink t23gfreepbxasteriskopenvpnvpnrtp
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    • scottalanmillerS
      scottalanmiller @RamblingBiped
      last edited by

      @RamblingBiped said in SIP Phone registers no audio...:

      This behavior is indicative of RTP port range being blocked, but since everything is being tunneled through a VPN that shouldn't be the case right?

      Correct. This sounds like SIP is working but RTP is not. SIP handles the registration, RTP handles the sound.

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      • scottalanmillerS
        scottalanmiller
        last edited by

        How is "NAT configured"? Are you sure that RTP is going over the network?

        RamblingBipedR 2 Replies Last reply Reply Quote 0
        • RamblingBipedR
          RamblingBiped @scottalanmiller
          last edited by

          @scottalanmiller said in SIP Phone registers no audio...:

          How is "NAT configured"? Are you sure that RTP is going over the network?

          Testing with Wireshark now.

          scottalanmillerS 1 Reply Last reply Reply Quote 0
          • scottalanmillerS
            scottalanmiller @RamblingBiped
            last edited by

            @RamblingBiped said in SIP Phone registers no audio...:

            @scottalanmiller said in SIP Phone registers no audio...:

            How is "NAT configured"? Are you sure that RTP is going over the network?

            Testing with Wireshark now.

            Okay

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            • RamblingBipedR
              RamblingBiped @scottalanmiller
              last edited by

              @scottalanmiller said in SIP Phone registers no audio...:

              How is "NAT configured"? Are you sure that RTP is going over the network?

              NAT is enabled on the extension in FreePBX and I've got UDP 5060 and UDP 10000-30000 forwarded to my PBX at our firewall.

              I ran wireshark from my PC, which is on the same network as our PBX, and I'm not seeing any UDP traffic in our RTP port range. On the remote extension side of things I shouldn't have to configure anything on the firewall if NAT is working correctly, right? I setup a porf forward range on the external network's firewall I'm using for testing so that it is forwarding UDP 10000-30000 directly to the remote extension. Now outbound calls are working again. I'm confused. I'm not seeing any of the RTP UDP traffic come across wireshark when I'm listening on the external network where my remote phone is connected. I do see RTP UDP traffic on my local network when I make the call to the remote extension.

              scottalanmillerS 2 Replies Last reply Reply Quote 0
              • RamblingBipedR
                RamblingBiped @scottalanmiller
                last edited by

                @scottalanmiller said in SIP Phone registers no audio...:

                You have NAT inside of your VPN?

                This is with and without the VPN enabled now. The remote extension in the UK has no sound at all, outbound or inbound. My test extension suddenly has no outbound audio unless I forward UDP port range 10000-30000 directly to the remote phone.

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                • scottalanmillerS
                  scottalanmiller @RamblingBiped
                  last edited by

                  @RamblingBiped said in SIP Phone registers no audio...:

                  NAT is enabled on the extension in FreePBX and I've got UDP 5060 and UDP 10000-30000 forwarded to my PBX at our firewall.

                  But aren't you using a VPN without NAT? Why is NAT enabled?

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                  • scottalanmillerS
                    scottalanmiller @RamblingBiped
                    last edited by

                    @RamblingBiped said in SIP Phone registers no audio...:

                    On the remote extension side of things I shouldn't have to configure anything on the firewall if NAT is working correctly, right?

                    I'm unclear how NAT is involved. NAT is on the firewall you are bypassing, not INSIDE the tunnel you are in, right?

                    RamblingBipedR 1 Reply Last reply Reply Quote 0
                    • RamblingBipedR
                      RamblingBiped @scottalanmiller
                      last edited by

                      @scottalanmiller said in SIP Phone registers no audio...:

                      @RamblingBiped said in SIP Phone registers no audio...:

                      On the remote extension side of things I shouldn't have to configure anything on the firewall if NAT is working correctly, right?

                      I'm unclear how NAT is involved. NAT is on the firewall you are bypassing, not INSIDE the tunnel you are in, right?

                      It worked with NAT enabled when I tested on my side with the VPN. I'll try disabling NAT on the extension and re-enabling the VPN.

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                      • RamblingBipedR
                        RamblingBiped
                        last edited by

                        Here is the guide I followed to get the Yealink T23G to work with OpenVPN: http://www.sunstatetechnology.com/docs/YealinkOpenVPNGuide.pdf

                        When I disable NAT on the extension the phone is unable to register.

                        mlnewsM 1 Reply Last reply Reply Quote 0
                        • mlnewsM
                          mlnews @RamblingBiped
                          last edited by

                          @RamblingBiped said in SIP Phone registers no audio...:

                          Here is the guide I followed to get the Yealink T23G to work with OpenVPN: http://www.sunstatetechnology.com/docs/YealinkOpenVPNGuide.pdf

                          When I disable NAT on the extension the phone is unable to register.

                          Something is wrong there, that sounds like the VPN is not working as there is no NAT when there is a VPN.

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