Hello,

I am using VOIPfone and have set up a Quadro to pass calls to them when I dial 155 (one of their automated test numbers).

The call routing entry is picked up without issue but I see a load of 407 Proxy Authentication Required messages. The SIP trunk itself is registered successfully.

I cannot fathom and although VOIPfone have been helpful it hasn't got anywhere, though they say that they suspect that I am not replying correctly to their authentication request.

In Wireshark and in the SIP logs below you can see the initial INVITE and then the 407 that declares the realm, and that the Quadro then sends it again with the correct realm and nonce. Then it all falls apart.

The Quadro is behind a Meraki MX firewall (so no SIP ALG) with port restricted cone NAT, clearly registration and initial call setup look okay but I cannot work out what is failing. The extension details used (999) appear correct, all the passwords are as required as far as I know and I have even entered them again.

Wireshark (on the outside interface of the fireaall) confirms INVITE/407/ACK/INVITE/407/ACK then a load of inbound 407s to which no response is seen in Wireshark or from the PBX but it gets the packets as you can see in the log.

My grey hair is getting greyer!

18:27:11 CallsAgent::OnMakeCall # MakeCall from CM # SID: 10833964809974509
18:27:11 SipSessDlg: # Call ID Info # SID: 10833964809974509 # 18:27:11 SipID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
18:27:11 SipSessDlg::ChangeSessTimerFlag # user 155 # SessionTimer = 0
18:27:11 CM --> UA # MakeCall # from: 30221053, to: 155@sip.voipfone.net:5060, ContactInfo: (empty) media exist # replaceSID: 0 # privacy: 0x0 # AlertInfo: not exist # AddInfo: [OP#sip.voipfone.net:5065][NP#1:60] | (empty) anonymous not exists # Identity: (empty) #OID: 18227 # SID: 10833964809974509
18:27:11 #MakeCall( Secure flag: Mandatory, SRTP Key size 0 ) OID: 18227 # SID: 10833964809974509
18:27:11 SipSessDlg::CMOnMakeCall # Privacy is on , but without enough info.
18:27:11 SipSessDlg::CMOnMakeCall # transport = UDP
18:27:11 SipDlg:etermineInitTarget # Call to primary outbound server # OID: 18227
18:27:11 SipDlg:etermineInitTarget # destip: sip.voipfone.net remPort: 5065 transport: UDP
18:27:11 TargetQualifier::QualifyTargets # Try to qualify targets for dest sip.voipfone.net # OID: 18227
18:27:11 SipDlg:etermineTarget # Wait for resolving destination: sip.voipfone.net # OID: 18227
18:27:11 TQAgent::UAMsgProc # Resolved addresses for host sip.voipfone.net via default dns
DEST: 46.31.225.185 UDP Port: 5060 TTL: unknown
18:27:11 TargetQualifier::NatHandling # Wait response from NATAgnet # OID: 18227
18:27:11 TargetQualifier::NATAgentMsg # Got NAT response: 'apply NAT mapping' (86.136.115.152:20000) # ID: 7000420586488991553
18:27:11 SipSessDlg::SelfMediaHandling # State: local offer, Sesssion Key: empty # OID: 18227 # SID: 10833964809974509
18:27:11 SipDlg::SetPrivacyToMsg # The Privacy is not enabled (0x0)(privacy, Identity: (empty) # OID: 18227 # SID: 10833964809974509
18:27:11 SipSessDlg::MakeSendInitInvite # mTargets.mAddInfo 0x1
18:27:11 SipDlg::SignMsg # Find Credentials in cach by sip:155@sip.voipfone.net # cache size 0: # OID: 18227
18:27:11 Try to send SIP message # (25/08/2021 17:27:11:146 GMT) # UDP # 1064 bytes # buff size 0 # from: 192.168.70.247:5060 # to: 46.31.225.185:5060

***************************** SIP message buffer start *****************************
INVITE sip:155@sip.voipfone.net SIP/2.0
Via: SIP/2.0/UDP 86.136.115.152:20000;rport;branch=z9hG4bKEPSVBUS45 9cce17-60f2-4733-a76f-7165f22ac649
To: <sip:155@sip.voipfone.net>
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
CSeq: 761 INVITE
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, UPDATE, PUBLISH
Contact: "DECT" <sip:30221053@86.136.115.152:20000>
Content-Type: application/sdp
Remote-Party-ID: <sip:30221053@sip.voipfone.net>
Supported: replaces, norefersub
User-Agent: Epygi Quadro SIP User Agent/v6.3.60 (QX-IPPBX)
P-Asserted-Identity: "DECT" <sip:30221053@sip.voipfone.net>
Max-Forwards: 70
Content-Length: 250

v=0
o=- 210 971 IN IP4 86.136.115.152
s=-
c=IN IP4 86.136.115.152
t=0 0
m=audio 6026 RTP/AVP 0 8 18 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
***************************** SIP message buffer end ******************************

18:27:11 Cl3wh::TUMsgProc # Start timer for DNS SRV fail-over, msg type: 51, state: State_Empty # DID: 18227 # TID: 18228
18:27:11 Receive SIP message # (25/08/2021 17:27:11:154 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS459cce17-60f2-4733-a76f-7165f22ac649;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF4abab266e65f06e3a 8f74ab91faf
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 761 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="612121c9"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:11 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:11 TLayer::MsgToTU # Msg type: 407 # TID: 18228 # DID: 18227
18:27:11 SipSessDlg::Inc4xxProc # Got 407 message # OID: 18227 # SID: 10833964809974509
18:27:11 Got 407 response, try to authenticate message # OID: 18227 # SID: 10833964809974509
18:27:11 Try to send SIP message # (25/08/2021 17:27:11:155 GMT) # UDP # 513 bytes # buff size 1 # from: 192.168.70.247:5060 # to: 46.31.225.185:5060

***************************** SIP message buffer start *****************************
ACK sip:155@sip.voipfone.net SIP/2.0
Via: SIP/2.0/UDP 86.136.115.152:20000;rport;branch=z9hG4bKEPSVBUS45 9cce17-60f2-4733-a76f-7165f22ac649
To: <sip:155@sip.voipfone.net>;tag=VF4abab266e65f06e3a 8f74ab91faf
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
CSeq: 761 ACK
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
User-Agent: Epygi Quadro SIP User Agent/v6.3.60 (QX-IPPBX)
Max-Forwards: 70
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:11 Try to send SIP message # (25/08/2021 17:27:11:155 GMT) # UDP # 1222 bytes # buff size 0 # from: 192.168.70.247:5060 # to: 46.31.225.185:5060

***************************** SIP message buffer start *****************************
INVITE sip:155@sip.voipfone.net SIP/2.0
Via: SIP/2.0/UDP 86.136.115.152:20000;rport;branch=z9hG4bKEPSVBUS77 b0871f-9295-4b29-a591-7370fe6aeec6
To: <sip:155@sip.voipfone.net>
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
CSeq: 762 INVITE
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, UPDATE, PUBLISH
Contact: "DECT" <sip:30221053@86.136.115.152:20000>
Content-Type: application/sdp
Remote-Party-ID: <sip:30221053@sip.voipfone.net>
Supported: replaces, norefersub
User-Agent: Epygi Quadro SIP User Agent/v6.3.60 (QX-IPPBX)
P-Asserted-Identity: "DECT" <sip:30221053@sip.voipfone.net>
Max-Forwards: 70
Proxy-Authorization: Digest realm="asterisk",nonce="612121c9",username="302210 53",uri="sip:155@sip.voipfone.net",response="7088c 1b3dd0c457daa88c6a616a6bc07"
Content-Length: 250

v=0
o=- 210 971 IN IP4 86.136.115.152
s=-
c=IN IP4 86.136.115.152
t=0 0
m=audio 6026 RTP/AVP 0 8 18 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
***************************** SIP message buffer end ******************************

18:27:11 Cl3wh::TUMsgProc # Start timer for DNS SRV fail-over, msg type: 51, state: State_Empty # DID: 18227 # TID: 18229
18:27:11 Receive SIP message # (25/08/2021 17:27:11:163 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS77b0871f-9295-4b29-a591-7370fe6aeec6;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF5d9459bdf1709fd64 1c92bad8544
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 762 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="1f4b8425"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:11 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:11 TLayer::MsgToTU # Msg type: 407 # TID: 18229 # DID: 18227
18:27:11 SipSessDlg::Inc4xxProc # Got 407 message # OID: 18227 # SID: 10833964809974509
18:27:11 Got 407 response, try to authenticate message # OID: 18227 # SID: 10833964809974509
18:27:11 Try to send SIP message # (25/08/2021 17:27:11:163 GMT) # UDP # 513 bytes # buff size 1 # from: 192.168.70.247:5060 # to: 46.31.225.185:5060

***************************** SIP message buffer start *****************************
ACK sip:155@sip.voipfone.net SIP/2.0
Via: SIP/2.0/UDP 86.136.115.152:20000;rport;branch=z9hG4bKEPSVBUS77 b0871f-9295-4b29-a591-7370fe6aeec6
To: <sip:155@sip.voipfone.net>;tag=VF5d9459bdf1709fd64 1c92bad8544
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
CSeq: 762 ACK
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
User-Agent: Epygi Quadro SIP User Agent/v6.3.60 (QX-IPPBX)
Max-Forwards: 70
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:11 SipSessDlg::ErrorHandling # Error: Authorization, Move to terminate state # OID: 18227 # SID: 10833964809974509
18:27:11 UA --> CM # ReportError # Error: Authorization # Sip error: 0 # SID: 10833964809974509
18:27:11 SipSessDlg::ErrorHandling # Error: Authorization, Move to terminate state # OID: 18227 # SID: 10833964809974509
18:27:11 UA --> CM # ReportError # Error: Authorization # Sip error: 407 # SID: 10833964809974509
18:27:11 SipSessDlg::TerminateTransactions # OID: 18227 # SIPID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc # SID: 10833964809974509
18:27:12 Receive SIP message # (25/08/2021 17:27:12:154 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS459cce17-60f2-4733-a76f-7165f22ac649;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF4abab266e65f06e3a 8f74ab91faf
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 761 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="612121c9"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:12 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:12 Receive SIP message # (25/08/2021 17:27:12:162 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS77b0871f-9295-4b29-a591-7370fe6aeec6;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF5d9459bdf1709fd64 1c92bad8544
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 762 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="1f4b8425"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:12 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:13 Receive SIP message # (25/08/2021 17:27:13:154 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS459cce17-60f2-4733-a76f-7165f22ac649;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF4abab266e65f06e3a 8f74ab91faf
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 761 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="612121c9"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:13 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:13 Receive SIP message # (25/08/2021 17:27:13:162 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS77b0871f-9295-4b29-a591-7370fe6aeec6;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF5d9459bdf1709fd64 1c92bad8544
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 762 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="1f4b8425"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:13 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:14 Receive SIP message # (25/08/2021 17:27:14:154 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS459cce17-60f2-4733-a76f-7165f22ac649;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF4abab266e65f06e3a 8f74ab91faf
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 761 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="612121c9"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:14 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:14 Receive SIP message # (25/08/2021 17:27:14:162 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS77b0871f-9295-4b29-a591-7370fe6aeec6;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF5d9459bdf1709fd64 1c92bad8544
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 762 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="1f4b8425"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:14 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:15 Receive SIP message # (25/08/2021 17:27:15:155 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS459cce17-60f2-4733-a76f-7165f22ac649;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF4abab266e65f06e3a 8f74ab91faf
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 761 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="612121c9"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:15 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:15 Receive SIP message # (25/08/2021 17:27:15:163 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS77b0871f-9295-4b29-a591-7370fe6aeec6;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF5d9459bdf1709fd64 1c92bad8544
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 762 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="1f4b8425"
Content-Length: 0

***************************** SIP message buffer end ******************************

18:27:15 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:16 Receive SIP message # (25/08/2021 17:27:16:154 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

***************************** SIP message buffer start *****************************
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS459cce17-60f2-4733-a76f-7165f22ac649;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF4abab266e65f06e3a 8f74ab91faf
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 761 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="612121c9"
Content-Length: 0

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18:27:16 TLayer::IsSelfReqResponse # self unique str in via EPSVBUS
18:27:16 Receive SIP message # (25/08/2021 17:27:16:162 GMT) # UDP # 653 bytes # buff size 1 # from: 46.31.225.185:5060 # to: 192.168.70.247:5060

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SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 86.136.115.152:20000;branch=z9hG4bKEPSVBUS77b0871f-9295-4b29-a591-7370fe6aeec6;received=86.136.115.152;rport=20000
From: "DECT" <sip:30221053@sip.voipfone.net>;tag=162976748627d4 024d-ece3-4902-8c01-f72c546e03d2
To: <sip:155@sip.voipfone.net>;tag=VF5d9459bdf1709fd64 1c92bad8544
Call-ID: 10833964809974509_9b10d718-f5de-4e19...ygi-config.loc
CSeq: 762 INVITE
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip:155@46.31.225.185>
Proxy-Authenticate: Digest realm="asterisk", nonce="1f4b8425"
Content-Length: 0

***************************** SIP message buffer end ******************************