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ebeigarts/iptables.md

Created August 7, 2012 20:51
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iptables
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iptables.md

iptables

Port forwarding

sysctl net.ipv4.ip_forward=1

10.57.68.122:6022 => 10.200.5.60:22 (SNAT)

iptables -t nat -A PREROUTING -p tcp -m tcp --dport 6022 -j DNAT --to-destination 10.200.5.60:22
iptables -t nat -A POSTROUTING -m conntrack --ctstate DNAT -j SNAT --to-source 10.57.68.122

office.makit.lv:8008 => 192.168.0.157:8008

iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 8008 -j DNAT --to 192.168.0.157:8008
iptables -A FORWARD -p tcp -i eth0 -d 192.168.0.157 --dport 8008 -j ACCEPT

List rules

iptables -L -t nat --line-numbers
iptables -L FORWARD --line-numbers

Delete rules

iptables -t nat -D PREROUTING 1
iptables -D FORWARD 6
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