IP Phones--->Call Manager--->Cisco CUBE--->Firewall ASA--->Internet<---VOIP ISP.
We want to establish a SIP Trunk between the CUBE and the VOIP ISP. We already managed to register with the ISP, but we can´t establish calls through it. We confirmed that we have enough credit to make calls.
It seems like a problem with the NAT in the Firewall, as it is not being able to change the private IP address in the SIP Payload.
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...