Linux Firewall: Simple Shell Script To Stop and Flush All Iptables Rules

in Categories Security last updated April 24, 2008
#!/bin/bash
# Linux Firewall: Simple Shell Script To Stop and Flush All Iptables Rules
# Some Linux distros like Debian do not have /etc/init.d/iptables stop script
# This can be also called from cron job if you are testing new firewall on
# remote box to avoid lock out
# -------------------------------------------------------------------------
# Copyright (c) 2004 nixCraft project <http://cyberciti.biz/fb/>
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT

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6 comment

  1. Silly question, but where should I save this script to in Debian? And how can I run it without having to mention ./location/location/script all the time?

    1. You can store it in your own ~/bin directory and add to the PATH in ~/.bash_profile:

      mkdir ~/bin
      cp script ~/bin
      cd ~/bin
      chmod +x script
      echo "export PATH=$PATH:~/bin" >> ~/.bash_profile
      export PATH=$PATH:~/bin
      cd
      sudo ~/script
  2. Hi Vivek,

    Could you please post a script on iptables rules for a webserver so that instead of APF or CSF you can just run this script daily or as per scheduled with a cron job.

    Thank you

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