IPTABLES rules as server proxy?

Question

linux

There is a server, it is planned as a proxy. From it you need to wrap traffic from a specific port to another server and another port. How to make IPTABLES on CentOS7 redirect traffic to different server and different port?

Answer 1

Something like this:

iptables -A PREROUTING -i eth0 -p tcp -m tcp --dport PORT -j DNAT --to-destination IP:PORT

Answer 2

It won't work on another server.

Answer 3

1. DNAT iptables, as written above. And don't forget about reverse SNAT rules in FORWARD.
2. haproxy in general, can work the way you want, although it is not designed for this. The setup is simple, give it a try.