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";
# The 'iptables' function also accepts long options,
# however, options with dashes need to be quoted
iptables table => "nat",
accept => "POSTROUTING",
"out-interface" => "eth0",
jump => "MASQUERADE";
# Version of IP can be specified in the first argument
# of any function: -4 or -6 (defaults to -4)
iptables_clear -6;
open_port -6, [22, 80];
close_port -6, "all";
redirect_port -6, 80 => 10080;
default_state_rule -6;
iptables -6, "flush";
iptables -6,
t => "filter",
A => "INPUT",
i => "eth0",
m => "state",
state => "RELATED,ESTABLISHED",
j => "ACCEPT";
};
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 another local port.
task "redirects", sub { redirect_port 80 => 10080; redirect_port 80 => { to => 10080, dev => "eth0", }; };
iptables(@params)
Write standard iptable comands.Note that there is a short form for the iptables "--flush" option; when you pass the option of "-F|"flush"" as the only argument, the command "iptables -F" is run on the connected host. With the two argument form of "flush" shown in the examples below, the second argument is table you want to flush.
task "firewall", sub { iptables t => "nat", A => "POSTROUTING", o => "eth0", j => "MASQUERADE"; iptables t => "filter", i => "eth0", m => "state", state => "RELATED,ESTABLISHED", j => "ACCEPT"; # automatically flushes all tables; equivalent to 'iptables -F' iptables "flush"; iptables -F; # flush only the "filter" table iptables flush => "filter"; iptables -F => "filter"; }; # Note: options with dashes "-" need to be quoted to escape them from Perl task "long_form_firewall", sub { iptables table => "nat", append => "POSTROUTING", "out-interface" => "eth0", jump => "MASQUERADE"; iptables table => "filter", "in-interface" => "eth0", match => "state", state => "RELATED,ESTABLISHED", jump => "ACCEPT"; };
is_nat_gateway
This function creates a NAT gateway for the device the default route points to.
task "make-gateway", sub { is_nat_gateway; is_nat_gateway -6; };
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; print Dumper iptables_list -6; };
iptables_clear
Remove all iptables rules.
task "no-firewall", sub { iptables_clear; };