NAME

Rex::Commands::Iptables - Iptable Management Commands

DESCRIPTION

With this Module you can manage basic Iptables rules.

SYNOPSIS

 use Rex::Commands::Iptables;
     
 task "firewall", sub {
    iptables_clear;
     
    open_port 22;
    open_port [22, 80] => {
       dev => "eth0",
    };
        
    close_port 22 => {
       dev => "eth0",
    };
    close_port "all";
        
    redirect_port 80 => 10080;
    redirect_port 80 => {
       dev => "eth0",
       to  => 10080,
    };
      
    default_state_rule;
    default_state_rule dev => "eth0";
        
    is_nat_gateway;
       
    iptables t => "nat",
             A => "POSTROUTING",
             o => "eth0",
             j => "MASQUERADE";
    
 };

EXPORTED FUNCTIONS

open_port($port, $option)

Open a port for inbound connections.

 task "firewall", sub {
    open_port 22;
    open_port [22, 80];
    open_port [22, 80] => { dev => "eth1", };
 };

close_port($port, $option)

Close a port for inbound connections.

 task "firewall", sub {
    close_port 22;
    close_port [22, 80];
    close_port [22, 80] => { dev => "eth0", };
 };

redirect_port($in_port, $option)

Redirect $in_port to an other local port.

 task "redirects", sub {
    redirect_port 80 => 10080;
    redirect_port 80 => {
       to  => 10080,
       dev => "eth0",
    };
 };

iptables(@params)

Write standard iptable comands.

 task "firewall", sub {
    iptables t => "nat", A => "POSTROUTING", o => "eth0", j => "MASQUERADE";
    iptables t => "filter", i => "eth0", m => "state", state => "RELATED,ESTABLISHED", j => "ACCEPT";
        
    iptables "flush";
    iptables -F;
    iptables flush => "filter";
    iptables -F => "filter";
 };

is_nat_gateway

This function create a nat gateway for the device the default route points to.

 task "make-gateway", sub {
    is_nat_gateway;
 };

default_state_rule(%option)

Set the default state rules for the given device.

 task "firewall", sub {
    default_state_rule(dev => "eth0");
 };

iptables_list

List all iptables rules.

 task "list-iptables", sub {
    print Dumper iptables_list;
 };

iptables_clear

Remove all iptables rules.

 task "no-firewall", sub {
    iptables_clear;
 };