Hi, colleagues. I discovered a strange problem when running Freeswitch from docker on the local machine, I have my machine API: 192.168.88.236 and docker with internal ip. 172.17.0.2. (local_ip_v4) With the next changes relative to vanilla install: valr.xml : external_rtp_ip=stun:stun.freeswitch.org - changed to external_rtp_ip=192.168.88.236 external_sip_ip=stun:stun.freeswitch.org - same autoload_configs/switch.conf.xml --- a narrow set of RTP ports. sip_profiles: internal.xml -- change ext-rtp-ip and ext-sip-ip to 192.168.88.236 external.xml -- same Then I trying to run docker from macos which publish ports: docker run -d -p 5060:5060/udp -p 5060:5060/tcp -p5061:5061/tcp -p 5080:5080/udp -p 5080:5080/tcp -p 5066:5066/tcp -p 7443:7443/tcp -p 63535-63635:63535-63635/tcp -p63535-64535:63535-64535/udp -p5555:5555 -p5050:5050 -p8000:8000 --hostname zaka-voice zaka-freeswitch-recognition:0.0.1 And then when I try to call Freeswitch from linphone from the local net, I can hear an answer, but looks like IVR on the Freeswitch side not receive RTP stream. I can't understand why. One hypothesizes -- that FreeSWITCH not determinate existence of external_ip as NAT mode (?) and ask the phone to send RTP to 172.17.0.2. How to verify this? Maybe exists some ideas, how to debug such situation behind a sip trace? Thanks. P.S. Additional info, if anybody found this interesting: I.e. I see SIP invite from FreeSWITCH SIP/2.0 100 Trying Via: SIP/2.0/TCP 192.168.88.238:50091 ;branch=z9hG4bK.rNrD-0O~i;rport=51208;received=172.17.0.1 From: <sip:1002@192.168.88.236>;tag=4bI6NNSIi To: "33332220" <sip:33332220@192.168.88.236> Call-ID: 7At9kxIfv2 CSeq: 21 INVITE User-Agent: FreeSWITCH-mod_sofia/1.10.4-dev-2421-8a5850ff26~64bit Content-Length: 0 then Ok and Acc from linphone (which freeswitch see as on 172.17.0.2) recv 354 bytes from tcp/[172.17.0.1]:51208 at 09:20:26.099724: ------------------------------------------------------------------------ SIP/2.0 200 Ok Via: SIP/2.0/TCP 192.168.88.236;branch=z9hG4bK8502eXUvmSKyN From: <sip:1002@172.17.0.2>;tag=mrr024e5DH57Q To: <sip:1002@172.17.0.2>;tag=ftaVWOB Call-ID: 940c69ac-4c1f-1239-4cb1-0242ac110002 CSeq: 23453420 NOTIFY User-Agent: LinphoneiOS/4.3.1 (iPad Ruslan) LinphoneSDK/4.4.0 Supported: replaces, outbound, gruu Content-Length: 0 recv 640 bytes from tcp/[172.17.0.1]:51208 at 09:20:26.514163: ------------------------------------------------------------------------ ACK sip:33332220@192.168.88.236:5060;transport=tcp SIP/2.0 Via: SIP/2.0/TCP 192.168.88.238:50091;rport;branch=z9hG4bK.iYrbMWTLP From: <sip:1002@192.168.88.236>;tag=4bI6NNSIi To: "33332220" <sip:33332220@192.168.88.236>;tag=N1HS4ZZ8atUtK CSeq: 21 ACK Call-ID: 7At9kxIfv2 Max-Forwards: 70 Proxy-Authorization: Digest realm="192.168.88.236", nonce="44104e4a-30cb-4277-8c31-61e437b6cbd1", algorithm=MD5, username="1002", uri="sip:33332220@192.168.88.236", response="756a3d3e3a76996988afa09a5544f1d1", cnonce="CWKOLtHm9Z8eVYIm", nc=00000001, qop=auth User-Agent: LinphoneiOS/4.3.1 (iPad Ruslan) LinphoneSDK/4.4.0 Content-Length: 0 Then freeswitch not see any activity and says BYE: BYE sip:1002@172.17.0.1:51208;transport=tcp SIP/2.0 Via: SIP/2.0/TCP 192.168.88.236;branch=z9hG4bK9etUgrc0H29gH Max-Forwards: 70 From: "33332220" <sip:33332220@192.168.88.236>;tag=N1HS4ZZ8atUtK To: <sip:1002@192.168.88.236>;tag=4bI6NNSIi Call-ID: 7At9kxIfv2 CSeq: 23453425 BYE User-Agent: FreeSWITCH-mod_sofia/1.10.4-dev-2421-8a5850ff26~64bit Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, path, replaces Reason: Q.850;cause=16;text="NORMAL_CLEARING" Content-Length: 0 --- status of Sofia profile: --- freeswitch@zaka-voice> sofia status profile internal ================================================================================================= Name internal Domain Name N/A Auto-NAT false DBName sofia_reg_internal Pres Hosts 172.17.0.2,172.17.0.2 Dialplan XML Context public Challenge Realm auto_from RTP-IP 172.17.0.2 Ext-RTP-IP 192.168.88.236 SIP-IP 172.17.0.2 Ext-SIP-IP 192.168.88.236 URL sip:mod_sofia@192.168.88.236:5060 BIND-URL sip:mod_sofia@192.168.88.236:5060 ;maddr=172.17.0.2;transport=udp,tcp WS-BIND-URL sip:mod_sofia@172.17.0.2:5066;transport=ws WSS-BIND-URL sips:mod_sofia@172.17.0.2:7443;transport=wss HOLD-MUSIC local_stream://moh OUTBOUND-PROXY N/A CODECS IN OPUS,G722,PCMU,PCMA,H264,VP8 CODECS OUT OPUS,G722,PCMU,PCMA,H264,VP8 TEL-EVENT 101 DTMF-MODE rfc2833 CNG 13 SESSION-TO 0 MAX-DIALOG 0 NOMEDIA false LATE-NEG true PROXY-MEDIA false ZRTP-PASSTHRU true AGGRESSIVENAT false CALLS-IN 0 FAILED-CALLS-IN 0 CALLS-OUT 0 FAILED-CALLS-OUT 0 REGISTRATIONS 0 -- Ruslan Shevchenko Software Engineer. http://ua.linkedin.com/in/ruslanshevchenko