My voice service provider (Vitelity) uses IP authentication and has provided me with the appropriate peer settings for the trunk including their host server address.
[vitel-inbound] type=friend dtmfmode=auto host=188.8.131.52 context=from-trunk disallow=all allow=ulaw,gsm insecure=port,invite canreinvite=no
However they said that incoming Invites would be coming from a whole range of IP addresses.
I guess the way to accomodate for that would be to set
allowguests=yes, which I prefer not do to.
Or to create a peer for each possible host IP address but that is probably also not practical.
Is there a reasonable way to accomplish this without laxing security with