Are anybody experiences issue when for some of calls ACK send to other IP. http://prntscr.com/jtxkbz in this case FS in bypass media with two profiles (1 to internet, 2 intranet). INVITE is send to DNS name that is resolved to 1. 10.0.9.32 2. 10.0.9.33 3. 10.0.9.34 4. 10.0.9.35 FS 1.6.19 Contact on 200 message is correct SIP/2.0 200 OK Via: SIP/2.0/TCP 10.0.9.51:12000;rport=39049;branch= z9hG4bKBH60NQjSZj36a From: "Anonymous" <sip:+12022553656@10.0.9.51>;tag= rH5cBQarr559D To: <sip:13013688630@metropolis.ack.one>;tag=UDv7UXv3B53Da Call-ID: b0e4d7e1-e79e-1236-8cb9-02420a000933 CSeq: 123998414 INVITE Contact: <sip:13013688630@10.0.9.33:11000;transport=tcp> User-Agent: proxy.ackone.com Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Now for future investigate FS upgrader to 1.6.20 and enabled siptrace and loglevel Sergey Safarov