Iptables several commands

Source: Internet
Author: User

One example: Prohibit an IP access to the server on the online server.

Iptables-i INPUT 2-s em1-j DROP

Prepare: According to the firewall policy order of each server to adjust, my server needs to plug in the front input 2, if inserted in the other effective policy, it will not take effect.

Cancel: iptables-d input-s em1-j DROP

Example: Prohibit an IP to access a port on this server.

Iptables-i INPUT 2-s tcp--dport 80-j DROP

Cancel: iptables-d input-s tcp--dport 80-j DROP

Example: Allow an IP to access a port on this server.

Iptables-i input-s TCP--dport 80-j ACCEPT

Cancellation: iptables-d input-s tcp--dport 80-j ACCEPT

Available: The above INPUT 2, according to the policy order of each server since the adjustment.

Iptables several commands

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