Q. I've only one public IP address assigned by my ISP using metro Ethernet connection. eth0 has public IP and eth1 is connected to our network switch. How do I configure Linux box to forward traffic to my web server hosted at 192.168.1.100 IP address?
A. There are many ways to forward traffic from public IP to private IP:
[a] Use iptables to forward traffic between private and public IPs. You can route traffic to certain machines on a DMZ for HTTP, HTTPS or SMTP service.
[b] Use reverse proxy software such as pound. It accepts requests from HTTP / HTTPS clients and distributes them to one or more Web servers.
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