traffic redirection by domain name to external addresses

setevoy

Hi.

We using Linux CentOS.

For example - we have 3 hosts - host1.domain.com, host2.domain.com, host3.domain.com. Hosts connected via VPN.

Task: host1.domain.com must be a gateway for http/https traffic, and redirect requestes to host2.domain.com and host3.domain.com.

host1.domain.com will have external IP and accepts request on 80 port.

host2.domain.com and host3.domain.com - internal IP and accepts request on 8080 and 8443 ports.

How this can be realised? IPTABLES, NGINX, something else?

And - what about other traffic? SSH, samba etc.

Thanks.

bingrenling

For port redirection:

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 8443

From one IP to another and one port to another:

iptables -t nat -I PREROUTING --src 1.1.1.1 --dst 2.2.2.2 -p tcp --dport 80 -j REDIRECT --to-ports 8080

For the redirection of requests from host1 to host2 or host3 (assuming you are loadbalancing), I would probably actually use ldirector and not iptables.

If you are also controlling your own DNS, you might use round-robin DNS to do this.