Tim Alberts wrote:
First,
I'd like to configure my system to forward ip, to act as a gateway for my network. I've always used a script during startup to do this:
echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -o ${UPLINK} -j SNAT --to ${IP_NAT}
This works fine, however I want this permanent so I don't have to run the script on startup. I have the firewall setup with SNAT fine, but when I write the file /etc/sysconfig/network with the line 'FORWARD_IPV4=YES' it still doesn't enable the ip forwarding after boot?
cat /proc/sys/net/ipv4/ip_forward 0
So how do I do this?
You want to modify the /etc/sysctl.conf file:
# Controls IP packet forwarding net.ipv4.ip_forward = 1
That change will take effect the next time the system is rebooted; or, you can type:
/sbin/sysctl -p
which will load the values specified in /etc/sysctl.conf immediately.
-Greg