IP forwarding

#
# File: /etc/sysctl.conf
#
#—————————————————————
# Enable routing (IP forwarding)
#—————————————————————

net/ipv4/ip_forward = 1

Now use the sysctl -p command to activate the settings.

[root@bigboy tmp]# sysctl -p
…
…
net.ipv4.ip_forward = 1
[root@bigboy tmp]#