Dual Wan 1:1 Nat Port Forward?

j2sw

I was reading on some other threads about Dual Wan and 1:1 Nat. We just moved up from a single wan to a dual wan setup. I am used to going in, adding a 1:1 Nat, adding a firewall rule to pass traffic to the host, and adding the proxy arp.

From what I read the Dual wan setup requires port forwarding to work properly? Is this true? If so any tutorials I am missing?

Thanks,
Justin

hoba

1:1 nat won't work if you try to make this for the same host at both wans as that then would be a 2:1 mapping. It works if you only need the 1:1 nat for one of the wans.

j2sw

I have IP space from both providers. I would be happy with it just working on one connection. I don't care about the Nat being available on both networks.

@hoba:

1:1 nat won't work if you try to make this for the same host at both wans as that then would be a 2:1 mapping. It works if you only need the 1:1 nat for one of the wans.

billm

@j2sw:

I was reading on some other threads about Dual Wan and 1:1 Nat. We just moved up from a single wan to a dual wan setup. I am used to going in, adding a 1:1 Nat, adding a firewall rule to pass traffic to the host, and adding the proxy arp.

From what I read the Dual wan setup requires port forwarding to work properly? Is this true? If so any tutorials I am missing?

Thanks,
Justin

I suspect most people don't have actual IP blocks in their multi-wan configs, just single IPs, so 1:1 nat's are in infrequent use. I think you'll be ok to do 1:1 via one wan. You should also be able to specify a port forward range of 1 to 65535, which from the outside would achieve the same result. Inside out, you can just use regular advanced outbound NAT to map the internal workstation to a given IP on each WAN.

–Bill