CentOS / Red Hat Linux IP Forwarding How To

How do I enable IP forwarding under RHEL / Red Hat / Fedora / CentOS Linux operating systems?

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You can easily turn on IP forwarding under Linux operating system by modifying Linux kernel variables (MIB).

Linux Enable IP Forwarding

Open /etc/sysctl.conf file using a text editor, enter:
# vi /etc/sysctl.conf
Set net.ipv4.ip_forward to 1, enter:

net.ipv4.ip_forward = 1

Save and close the file. Reload the changes by typing the following command:
# sysctl -p

See: How to setup Linux as a router for DSL, T1 line etc

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1 comment… add one
  • HaboBabo May 24, 2014 @ 4:02

    uhm.. and where to put the ‘new’ IP?…

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