Inbound calls from services like ENUM regarding security

If I want to have a record in one of the type lists. Does this require that I have both “Allow SIP Guests” and “Allow Anonymous Inbound SIP Calls” enabled? I tested calling my system and the only configuration that seems to work is both allowed. In, I have it set to call SIP:@.

That is the nature of enum, you will need to rely on your firewall and careful choice of ports to secure the system.

Some SIP providers (like will give you a sip uri you can use to receive sip calls over a normal registered trunk. Not free, but very cheap and fewer security issues.