Hello friends. Maybe someone can guide me through this issue.
I have configured a grandstream PBX in dual mode so I can reach internal SIP provider with one port and public IP be available for registering outside extensión in the second port.
With this configuration I can reach the internal Sip provider but not the external ip only if I am connected to local lan.
I have isp /29 public ip’s in wan bridge and the second port is connected to grandstream interface configured with public ip in this bridge but I can’t reach it from outside the lan.
If I am connected to lan I can register my extensión but Mikrotik is not participating in the routing so I don’t find out why is not registering since the public IP address is configured directly in my PBX.