kann man evtl. den SIP contact header manipulieren?
Via: SIP/2.0/UDP 192.168.111.47:5068;branch=z9hG4bK0866740e0a4d4150 a844fdce3c2260db
To: "49xxxxxxxxxxx" <sip:494949xxxxxxxxxxx@sip.1und1.de:5060;transpo rt =udp>
From: "494949xxxxxxxxxxx" <sip:494949xxxxxxxxxxx@sip.1und1.de:5060;transpo rt =udp>;tag=SVABLTMVHE
Call-ID: f81f3913-6710-4a5f-9281-0db1a1ffa023
[Generated Call-ID: f81f3913-6710-4a5f-9281-0db1a1ffa023]
CSeq: 1 REGISTER
Contact: "49xxxxxxxxxx" <sip:49xxxxxxxxx@192.168.111.47:5068;transport=udp>
SIP Display info: "49xxxxxxxxxxx"
Contact URI: sip:4949xxxxxxxxxxx@192.168.111.47:5068;transport=udp
Max-Forwards: 70
User-Agent: OfficeMaster directSIP sip10 6.2.6.11486
Expires: 480
Allow: ACK, BYE, CANCEL, INVITE
Content-Length: 0
Hintergrund ist der, dass 1und1 private IP Adressen im contcat header ablehnt:
Status-Line: SIP/2.0 403 Nicht unterstuetzte IP im Contact-Header
Via: SIP/2.0/UDP 192.168.111.47:5068;branch=z9hG4bK0866740e0a4d4150 a844fdce3c2260db
To: "49xxxxxxxxxxx" <sip:494949xxxxxxxxxxx@sip.1und1.de:5060;transpo rt =udp>
From: "494949xxxxxxxxxxx" <sip:494949xxxxxxxxxxx@sip.1und1.de:5060;transpo rt =udp>;tag=SVABLTMVHE
Call-ID: f81f3913-6710-4a5f-9281-0db1a1ffa023
[Generated Call-ID: f81f3913-6710-4a5f-9281-0db1a1ffa023]
CSeq: 1 REGISTER
Contact: "49xxxxxxxxxx" <sip:49xxxxxxxxx@192.168.111.47:5068;transport=udp>
SIP Display info: "49xxxxxxxxxxx"
Contact URI: sip:4949xxxxxxxxxxx@192.168.111.47:5068;transport=udp
Max-Forwards: 70
User-Agent: OfficeMaster directSIP sip10 6.2.6.11486
Expires: 480
Allow: ACK, BYE, CANCEL, INVITE
Content-Length: 0
Hintergrund ist der, dass 1und1 private IP Adressen im contcat header ablehnt:
Status-Line: SIP/2.0 403 Nicht unterstuetzte IP im Contact-Header
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