NAME

Rex::Commands::Iptables - Iptable Management Commands

DESCRIPTION

With this Module you can manage basic Iptables rules.

Version <= 1.0: All these functions will not be reported.

Only open_port and close_port are idempotent.

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";
};

task "firewall", sub {
 open_port 22,
   dev    => "eth1",
   only_if => "test -f /etc/firewall.managed";
} ;

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",
    only_if => "test -f /etc/firewall.managed";
};

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 creates 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;
};