Hi everyone,

I'm looking for some help with iptables and ipset.

I'd like to use iptables & ipset to redirect all "non-good" IPs to another server.

I have a set of "Good" IPs that will have access to the server (1.1.1.1), on port 80.

Any IP not in the "Good" set should be redirected to 2.2.2.2 on port 80.

Thanks in advance.

Without going into excruciating detail (and doing all the work myself), there are three things you will need to do:
1. Define the "good" and "bad" sets of IP source addresses (using ipset)
2. Create an iptables rule (in the FILTER table) that forwards the "good" packets to their server (presumably your DNS has supplied the correct address for this server already).
3. Create an iptables rule (in the NAT table) that changes the destination address for "bad" packets.

So long as both servers have public IP addresses, this should take care of separating the traffic and directing it to the appropriate server.