Dears, I have a problem and I hope you can help me
I have two network interfaces on my server
eth0 -> LAN AND INTERNET
eth1 -> to my sip provider
previously I could make or receive calls without problems from and to the internet with softphone or by VPN with the public ip that goes to the eth0 network, this was until I changed the parameter (external address) because I changed my analog lines to digital and in this parameter I had the public ip that goes to the eth0 network and I changed it to the public ip that has the inferred eth1 due to audio problems, obviously I preferred to use the ip of eth1 since there are cell phone calls coming and going , local phones, other companies etc.
now the phones that are on the internet or vpn register to the server, make and receive calls, but do not have audio, it is probably a routeo / nat problem but I don’t know how to solve it.
Has anyone had any experience with this problem?