Networking on Linux

Here’s something worth mentioning. In Arch Linux, there are a couple of places to enable/disable IP forwarding. In order to make sure forwarding is enabled,

/etc/sysctl.conf

net.ipv4.ip_forward = 1.

Also make sure:

/etc/conf.d/iptables

IP_FORWARD=1.

Naturally this all relates to making sure the file

/proc/sys/net/ipv4/ip_forward

has a one instead of a zero in it.