Registration error: 403 - Forbidden (Bad auth)
Registration error: 408 - Forbidden (Bad auth)
These errors are caused by the firewall, the sip server accepts the registration and return traffic
traffic is blocked at the firewall. Please do the following changes at the firewall.
For example, Netgear, under advanced, WAN setup, put a check mark on disable SIP ALG
Port forwarding 5060
You need to enable ports tcp/udp 5060 to all networks.
