Difference between revisions of "Iptables quick guide"

Revision as of 19:01, 25 February 2013

http://www.linode.com/wiki/index.php/Netfilter_IPTables_Mini_Howto

Changing the default policy in iptables

iptables -P INPUT DROP

allow outbound rsync and insert rule at the top of the chain

iptables -I OUTPUT -p tcp -d 1.1.1.1 --dport 873 -j ACCEPT

NAT

show nat rules

iptables -L -t nat

hide nat behind and interface

iptables -t nat -A POSTROUTING -o tun0 -s 192.168.1.0/24 -j MASQUERADE

saving rules for reload on reboot

on fedora 17

iptables-save > /etc/sysconfig/iptables