Multiple IPs on WAN to LAN servers. How to?

I have multiple public IPs on WAN available and I need to “hairpin” a couple of them to two servers on LAN.
One of those will be used for the router alone, the other ones for servers.
I have tried the Hairpin wiki page with no luck.
Any hint?

Thanks in advance.

“Hairpin” typically refers to using port translation when you only have a single IP address. What you want to do is create static NAT rules. First, add all of your public addresses to your WAN interface, and then create static NAT rules to forward traffic from the extra IPs into the desired servers. I’d recommend you use static IPs internally for those servers. Then you can control which ports on those servers are accessible via standard firewall rules.

I also need to translate the outgoing traffic of the “servers” each with its own public IP.
Thanks for the clarification.