Good afternoon Ladies and Gentlemen, I'm using FreeSWITCH (1.7.0 git cae2553 2015-12-11 00:23:48Z 64bit) as B2BUA between Kamailio and our own Server. Our Server is attached to FreeSWICH via ESL.
From Kamailio into our own Server it is connecting w/o problems. But when I initiate a call from our Server to Kamailio via FreeSWITCH I've a weird reaction:
Network-Overview: PSTN(192.168.1.30) --> Kamailio(192.168.1.150/10.250.5.74) --> FreeSWITCH(10.250.5.72) --> Our Server(10.250.5.67) 1st Initial Invite to FS: INVITE sip:7@10.250.5.72 SIP/2.0 Via: SIP/2.0/UDP 10.250.5.17:5090;branch=z9hG4bK.GSRDySx-y;rport From: <sip:1001@10.250.5.72>;tag=nDaJDf3lz To: sip:7@10.250.5.72 Route: <sip:10.250.5.72:5080;lr> Content-Type: application/sdp 7 is mapped to go to our Server and our Server then is trying to connect to a UA (2031) at PSTN via FreeSWITCH gateway(Kamailio): INVITE sip:2031@10.250.5.74:5070 SIP/2.0 Via: SIP/2.0/UDP 10.250.5.72:5070;rport;branch=z9hG4bKmgrc4De2Q0ySN From: "" <sip:1001@[10.250.5.72:5070]>;tag=U5jj715ZB6maK To: <sip:2031@10.250.5.74:5070> This Invite was built by FreeSWITCH and I could confirm that the "SIP-Invite" sent via ESL to FreeSWITCH from our Server was correct but as you can see here FreeSWITCH "malformed" the From-Header with the square brackets and due to that I'm getting error from PSTN later: SIP/2.0 400 Bad Request Warning: 399 192.168.1.30 "Malformed headers : From " To: <sip:2031@10.250.5.74:5070>;tag=ae0f6cb7ca85c1fb958bd8bed1f9b7b7 Here some config data that is set in FreeSWITCH: Vars.xml: <X-PRE-PROCESS cmd="set" data="domain=10.250.5.72"/> <X-PRE-PROCESS cmd="set" data="external_sip_port=5070"/> <X-PRE-PROCESS cmd="set" data="internal_sip_port=5080"/> Sip-profiles/external/testpbx.xml: <include> <gateway name="testpbx"> <param name="realm" value="10.250.5.74:5070"/> <param name="from-domain" value="10.250.5.72:5070"/> <param name="proxy" value="10.250.5.74:5070"/> ... </gateway> </include> Sip-profiles/external.xml and internal.xml: <param name="rtp-ip" value="10.250.5.72"/> <param name="sip-ip" value="10.250.5.72"/> <param name="ext-rtp-ip" value="10.250.5.72"/> <param name="ext-sip-ip" value="10.250.5.72"/> Can anyone help why FreeSWITCH is doing this or can point to a class where the the From Header is built? Maybe someone knows a solution? Here you can find full SIP-Trace Logs and Full FreeSWITCH Debugging Log: https://we.tl/FtPuknRrSw Very Respectfully Dimitry Nagorny Trainee