I am having trouble with RTP and NAT :
Below is a SIP SDP invite from a remote endpoint which is trying to call extension 420 which is the ECHO application . As you can see, the public IP is where the request comes in from, but the SDP contains the private, internal IP in numerous places. I do have rewrite_contact=yes; on in my pjsip endpoint configuration, but still the “rtp set debug on” command is showing me that when I dial into the echo application, RTP packets are being sent to the private IP and not the public IP . Advice appreciated thank you. <--- Received SIP request (1282 bytes) from TLS:72.52.31.109:55256 ---> INVITE sip:[email protected] SIP/2.0 Via: SIP/2.0/TLS 10.128.30.239:55253;branch=z9hG4bK-524287-1---bf28eb29eb900b43;rport Max-Forwards: 70 Contact: <sip:[email protected]:55256;transport=TLS;rinstance=e652ef90f2843e40> To: <sip:[email protected]> From: "Kevin"<sip:[email protected]>;tag=0af40611 Call-ID: MGE5OWFhMDY5OGFhYzM4ZDIxNjA5OGRjY2M5OWE3ZGY CSeq: 2 INVITE Allow: INVITE, ACK, CANCEL, BYE, REFER, INFO, NOTIFY, UPDATE, PRACK, MESSAGE, OPTIONS, SUBSCRIBE, OPTIONS Content-Type: application/sdp Supported: replaces, 100rel User-Agent: Bria iOS release 3.6.2 stamp 33024 Authorization: Digest username="6000",realm="asterisk",nonce="1456965577/29f2977e5352209d33847b1eafc5f937",uri="sip:[email protected]",response="9c23bba47f43fa343bfc3bd2580a84ad",cnonce="ea996236e91c869bb16b1652c8504ba3",nc=00000001,qop=auth,algorithm=md5,opaque="609ab4014ccfac10" Content-Length: 358 v=0 o=- 1456965576139402 1 IN IP4 10.128.30.239 s=Cpc session c=IN IP4 10.128.30.239 t=0 0 m=audio 61216 RTP/SAVP 0 101 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:tkUxPSw8qTZ25fk6VuQPWNVOABk5mwe63/+d7vP7 a=crypto:2 AES_CM_128_HMAC_SHA1_32 inline:tkUxPSw8qTZ25fk6VuQPWNVOABk5mwe63/+d7vP7 a=sendrecv
smime.p7s
Description: S/MIME cryptographic signature
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