NAT settings, multiple public IP addresses

General Help
1

Hi everyone, hopefully someone can help me on this.

What I have is:

Single Asterisk server
2 independent SIP providers
2 independent ISPs

Currently Asterisk box is working fine to SIP provider 1 using ISP 1, obviously with my public IP of ISP 1 in the NAT settings section.

What I would like to do is add SIP provider 2 onto the box via ISP 2

I have already configured the routing on the firewall to send traffic to SIP prov 1 via wan1 and SIP prov 2 via wan2, and configured inbound as needed as well. Problem is I only have 1 public IP setting in the NAT settings bit so I assume it is not going to work still.

Has anyone done this in the past and can suggest whether it is possible. I wondered whether there is anyway for me to add the NAT bit into the trunk settings rather than it being global or something like that.

Thanks very much

Rob

2

Because NAT essentially tells the outside world what IP to send data to, I’m guessing it would be impossible to route that way.

I think with iptables you can define routes, but you’ll have to most likely disable(?) NAT when you use multiple routes.

I could be incredibly wrong.

3

No, you can’t add NAT in a peer it’s a global setting.

You could add another interface, install a firewall on the machine such as APF and then use static routes.