Reset (disable) firewall

disable_fw.sh

#!/bin/bash
# disable_fw.sh - Reset (disable) firewall
# ---------------------------------------------------------------------------------------------------------------
# Initially Written by Vivek Gite <vivek@nixcraft.com>
# Rewrited by Valentin Fedulov <vasnake@gmail.com>
# Source: http://www.cyberciti.biz/faq/turn-on-turn-off-firewall-in-linux/
# ---------------------------------------------------------------------------------------------------------------
# You can copy / paste / redistribute this script under GPL version 2.0 or above
# =============================================================

# set to true if it is CentOS / RHEL / Fedora box
RHEL=false

### no need to edit below  ###

IPT=/sbin/iptables
IPT6=/sbin/ip6tables

main() {
    if [ "$RHEL" == "true" ];
    then
        # reset firewall using redhat script
        /etc/init.d/iptables stop
        /etc/init.d/ip6tables stop
    else
        # for all other Linux distro use following rules to reset firewall
        reset_iptables ${IPT} "/proc/net/ip_tables_names"
        reset_iptables ${IPT6} "/proc/net/ip6_tables_names"
    fi
}

reset_iptables() {
    local ipt_bin="${1}"
    local tables="${2}"

    $ipt_bin -P INPUT ACCEPT
    $ipt_bin -P OUTPUT ACCEPT
    $ipt_bin -P FORWARD ACCEPT
    $ipt_bin -F
    $ipt_bin -X
    $ipt_bin -Z

    for table in $(<$tables)
    do
        $ipt_bin -t $table -F
        $ipt_bin -t $table -X
        $ipt_bin -t $table -Z
    done
}

main