Hi
I started learning about Asterisk and VoIP, and I keep reading that SIP is a pain to use with NAT, while IAX is a breeze. Since most users today are behind NATed firewalls, it's difficult to understand why SIP is much more popular than IAX.
=> Can someone explain what the problem is with SIP, why it's a pain to use with NATed firewalls, and how to configure things right, assuming for instance that both callers and callees are on the Net, each using a private address behing a NATed firewall?
Thank you.