How to Turn on IP Forwardarding
IP Forwarding Effectively makes a Linux box act as a router Is usually used with two network interfaces (one internal, and one external) Can be used with firewall services and is often used for NAT Steps to Turn on IP Forwarding 1) Modify /etc/sysctl.conf vi /etc/sysctl.conf add this line: inet.ipv4.ip_forward=1 2) Make the Change Active sysctl -p 3) To View Current Settings: sysctl -a | grep ipv4 More info can be found on the redhat site: https://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/security-guide/s1-firewall-ipt-fwd.html We'll leave firewall rules for another topic... rhce linux