Hello guys, I have this setup: Zoiper-->Kamailio->fs->kamailio->webrtc client(s) Whenever webrtc clients call each other, calls are ok. But when the zoiper (regular sip/tcp) calls, the browsers complaint about: "no ice-ufrag" (firefox) or "Failed to set remote offer sdp: Called with SDP without DTLS fingerprint." (Chrome). I am setting the sdp in freeswitch as: <action application="set" data="proxy_media=false"/> <action application="set" data="bypass_media=false"/> <action application="export" data="zrtp_secure_media=false"/> <action application="export" data="nolocal:rtp_secure_media=true"/> and the actual sdp is: v=0 o=FreeSWITCH 1499354716 1499354717 IN IP4 1.2.3.4 s=FreeSWITCH c=IN IP4 1.2.3.4 t=0 0 m=audio 40954 RTP/SAVP 8 101 13 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=rtpmap:13 CN/8000 a=crypto:1 AEAD_AES_256_GCM_8 inline:9XidL0Z5VYb0L5CegRZaYVrVfjA0Im Wgu5WyLK0vtg60RTk6Koe8c0sRkjU a=crypto:2 AEAD_AES_128_GCM_8 inline:fLKE1lxhRoVw+D5NVoKFFw06I0Xok/9KbRystQ a=crypto:3 AES_CM_256_HMAC_SHA1_80 inline:w/yDN+ ETPuCOiOIxjFLRjbFbDxp2xaxhXz4QVwBXWxJw/GigOURGw8EMv9fVUg a=crypto:4 AES_CM_192_HMAC_SHA1_80 inline:evU8MzAtiSHwKb95s4V9IAMpmok06k W9ZGDgH3/Lc3ZytVn2SR4 a=crypto:5 AES_CM_128_HMAC_SHA1_80 inline:KKDkT0DssohSeKFsX6tbixRhwYdiIh E6r3u5CCVA a=crypto:6 AES_CM_256_HMAC_SHA1_32 inline:D3JgGuOlIxXfHGdqf7lKWqNDAIiJrb OqOKb+erlhPQtBKF4wzomjbN0sBIiE4w a=crypto:7 AES_CM_192_HMAC_SHA1_32 inline:c12ebWWzZ1cqZN0v5C5uYzdvtfnw6A ARU3+jGA0WzTSDlDd20vI a=crypto:8 AES_CM_128_HMAC_SHA1_32 inline:nPZku7S6hlz2OPAff8T9I8sNFzuZzi Ng64KuvfNS a=crypto:9 AES_CM_128_NULL_AUTH inline:9MNdj7xaingoGY14NUg8iS3dhTqD0X W8FAOLNtmP a=ptime:20 a=nortpproxy:yes I'm pretty new to the webrtc stuff, so any help is greatly appreciated! Thanks! David Villasmil email: david.villasmil.work@gmail.com phone: +34669448337 <+34%20669%2044%2083%2037> ᐧ