Might be nice to directly do this on the network entry point due to the open port requirements.
Commonly used software would be:
or
Looking at this it seems that this is to provide a VoIP server capability.
I believe this should be done on a separate machine in the Orange (DMZ) zone and not directly on IPFire.
In the past Asterix was provide on IPFire as an addon but was removed in CU158 due to the security issues that kept coming up.
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