Hello, Registrations on my FS follow this pattern. Register Unauthorised 401 Register with Authorization 200 OK I have recently added another phone in another domain on the same profile and the first Register attempt follows the above pattern but thereafter (every 10 mins) the phone sends a register with the authorization already included, the 401 is not sent. I.e. Register with Authorization 200 OK I haven't modified any ACL, apply-register-acl is commented out in the internal.xml profile. I have studied the ACL page in the wiki, but cannot clarify this behavior. I also cannot find any settings in the sip phone either. Any insights would be appreciated? Small sip trace here, First Register is without 401 and the second with 401! Many thanks! Regards, Steve. ------------------------------------------------------------------------ recv 827 bytes from udp/[80.101.42.120]:58860 at 10:37:08.546282: ------------------------------------------------------------------------ REGISTER sip:voiptest.callstera.com SIP/2.0 Via: SIP/2.0/UDP 192.168.1.13:25260;branch=z9hG4bK45463f76b31dc556;rport From: "1002" <sip:1002@voiptest.callstera.com>;tag=e03fcb9ff95bdf71 To: <sip:1002@voiptest.callstera.com> Contact: <sip:1002@80.101.42.120:58860;transport=udp> Supported: path X-Grandstream-PBX: true Authorization: Digest username="1002", realm="voiptest.callstera.com", algorithm=MD5, uri="sip:voiptest.callstera.com", qop=auth, nc=00000010, cnonce="42dc84a07d688734", nonce="809cda5a-8cbe-11e3-8d0c-5dbb90e62c86", response="1c8d0736df9903992397426089525d48" Call-ID: fe877c770cc8d17d@192.168.1.13 CSeq: 10011 REGISTER Expires: 60 User-Agent: Grandstream GXP1200 1.2.5.3 Max-Forwards: 70 Allow: INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE Content-Length: 0 ------------------------------------------------------------------------ send 627 bytes to udp/[80.101.42.120]:58860 at 10:37:08.548713: ------------------------------------------------------------------------ SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.1.13:25260;branch=z9hG4bK45463f76b31dc556;rport=58860;received=80.101.42.120 From: "1002" <sip:1002@voiptest.callstera.com>;tag=e03fcb9ff95bdf71 To: <sip:1002@voiptest.callstera.com>;tag=gH8etK6gQ81HB Call-ID: fe877c770cc8d17d@192.168.1.13 CSeq: 10011 REGISTER Contact: <sip:1002@80.101.42.120:58860;transport=udp>;expires=60 Date: Mon, 03 Feb 2014 10:37:08 GMT User-Agent: Callstera VOIP PBX v1.20 Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces Content-Length: 0 ------------------------------------------------------------------------ recv 511 bytes from udp/[80.101.42.120]:41476 at 10:37:13.918646: ------------------------------------------------------------------------ REGISTER sip:callstera.callstera.com SIP/2.0 Via: SIP/2.0/UDP 192.168.1.57:5060;branch=z9hG4bK3aa0c704c1fb893893ca86fc64ba2658;rport From: "Marc" <sip:1000@callstera.callstera.com>;tag=1895422338 To: "Marc" <sip:1000@callstera.callstera.com> Call-ID: 3438668376@192_168_1_57 CSeq: 17927 REGISTER Contact: <sip:1000@192.168.1.57:5060> Max-Forwards: 70 User-Agent: N510 IP PRO/42.075.00.000.000 Expires: 300 Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, REFER, SUBSCRIBE, NOTIFY Content-Length: 0 ------------------------------------------------------------------------ 2014-02-03 11:37:13.959442 [WARNING] sofia_reg.c:1634 SIP auth challenge (REGISTER) on sofia profile 'internal' for [1000@callstera.callstera.com] from ip 80.101.42.120 send 677 bytes to udp/[80.101.42.120]:41476 at 10:37:13.969082: ------------------------------------------------------------------------ SIP/2.0 401 Unauthorized Via: SIP/2.0/UDP 192.168.1.57:5060;branch=z9hG4bK3aa0c704c1fb893893ca86fc64ba2658;rport=41476;received=80.101.42.120 From: "Marc" <sip:1000@callstera.callstera.com>;tag=1895422338 To: "Marc" <sip:1000@callstera.callstera.com>;tag=Ht17UeQmmHr4p Call-ID: 3438668376@192_168_1_57 CSeq: 17927 REGISTER User-Agent: Callstera VOIP PBX v1.20 Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces WWW-Authenticate: Digest realm="callstera.callstera.com", nonce="25084f5c-8cbf-11e3-8d11-5dbb90e62c86", algorithm=MD5, qop="auth" Content-Length: 0 ------------------------------------------------------------------------ recv 790 bytes from udp/[80.101.42.120]:41476 at 10:37:14.017384: ------------------------------------------------------------------------ REGISTER sip:callstera.callstera.com SIP/2.0 Via: SIP/2.0/UDP 192.168.1.57:5060;branch=z9hG4bK4e0ee57b1a907eea7e0c800286896269;rport From: "Marc" <sip:1000@callstera.callstera.com>;tag=1895422338 To: "Marc" <sip:1000@callstera.callstera.com> Call-ID: 3438668376@192_168_1_57 CSeq: 17928 REGISTER Contact: <sip:1000@192.168.1.57:5060> Authorization: Digest username="1000", realm="callstera.callstera.com", qop=auth, algorithm=MD5, uri="sip:callstera.callstera.com", nonce="25084f5c-8cbf-11e3-8d11-5dbb90e62c86", nc=00000001, cnonce="9a8446414e2c5ca357b9b53bc645064e", response="c52337b2e6f18904d0e2a4ec14b44de9" Max-Forwards: 70 User-Agent: N510 IP PRO/42.075.00.000.000 Expires: 300 Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, REFER, SUBSCRIBE, NOTIFY Content-Length: 0 ------------------------------------------------------------------------ send 624 bytes to udp/[80.101.42.120]:41476 at 10:37:14.019683: ------------------------------------------------------------------------ SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.1.57:5060;branch=z9hG4bK4e0ee57b1a907eea7e0c800286896269;rport=41476;received=80.101.42.120 From: "Marc" <sip:1000@callstera.callstera.com>;tag=1895422338 To: "Marc" <sip:1000@callstera.callstera.com>;tag=j3t0X97QHteQj Call-ID: 3438668376@192_168_1_57 CSeq: 17928 REGISTER Contact: <sip:1000@192.168.1.57:5060>;expires=300 Date: Mon, 03 Feb 2014 10:37:14 GMT User-Agent: Callstera VOIP PBX v1.20 Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces Content-Length: 0