How To Start iptables

How To Start iptables

You can start, stop, and restart iptables after booting by using the commands:

# service iptables start
# service iptables stop
# service iptables restart

To get iptables configured to start at boot, use the chkconfig command:.

# chkconfig iptables on

Determining The Status of iptables

# service iptables status

Firewall is stopped.

How to backup running iptables scripts

This example exports the iptables-save output to a text file named firewall-config.

# iptables-save > firewall-config


After editing the firewall-config file with the commands you need, you can reload it into the active firewall rule set with the iptables-restore command.

# iptables-restore < firewall-config

Finally, you should permanently save the active configuration so that it will be loaded automatically when the system reboots:

# service iptables save

If desired, you can eventually convert this firewall-config file into a regular iptables script so that it becomes more easily recognizable and manageable

How to make you Linux as Router

On linux You just need to run this command to act ur linux as router. Frist configure your both network interface. then run this command from terminal.

#echo "1" > /proc/sys/net/ipv4/ip_forward
#/sbin/iptables -t nat -A POSTROUTING -o -eth0 -J MASQUERADE
#/sbin/iptables save
#/sbin/chkconfig iptables on

here I guess eth0 is ur Internet interface. If not then change it ti eth1