23.1.5 Problem with SIP

[thesisko78]

I contacted Agfeo allready. No incoming calls possible. But it worked for weeks. They did some research and to the the issue is that the SIP Packets are changed. The PBX is registering with internal IP, but incoming (invite) hasexternal ip included. Because here isn´t a match, the PBX is refusing the call. I should deactivate things like SIP-ALG. But OPNSENSE does not use SIP-ALG?

May anyone help?


In Ihrem Fall, scheint etwas die SIP Pakete zu verändern.
> Wir registrieren uns hier mit einer lokalen IP-Adresse. In dem Invite ist aber
> die externe IP-Adresse enthalten. Dadurch lehnt die Telefonanlage diesen Anruf
> ab. Bitte deaktivieren Sie jegliche SIP Helper (z.B. SIP-ALG) in Ihrer Firewall.