Howto disable the iptables firewall in Linux

Transcription

1 Home About Forum Shell Scripts Tutorials request Subscribe Linux FAQ / Howtos Howto disable the iptables firewall in Linux by Vivek Gite 11 comments Q. Quick question: I need to disable firewall in Linux for testing purpose. I m using CentOS 4.4. How do I disable the firewall in Linux? A. A Linux firewall is software based firewall that provides protection between your server (workstation) and damaging content on the Internet or network. It will try to guard your computer against both malicious users and software such as viruses/worms. Task: Disable / Turn off Linux Firewall (Red hat/centos/fedora Core) Type the following two commands (you must login as the root user): # /etc/init.d/iptables save # /etc/init.d/iptables stop Task: Enable / Turn on Linux Firewall (Red hat/centos/fedora Core) Type the following command to turn on iptables firewall: # /etc/init.d/iptables start Other Linux distribution If you are using other Linux distribution such as Debian / Ubuntu / Suse Linux etc, try following generic procedure. Save firewall rules # iptables-save > /root/firewall.rules OR $ sudo iptables-save > /root/firewall.rules Now type the following commands (login as root): # iptables -X # iptables -t nat -F # iptables -t nat -X cyberciti.biz/ /turn-on-turn-off-firewal 1/6

2 # iptables -t mangle -F # iptables -t mangle -X # iptables -P INPUT ACCEPT # iptables -P FORWARD ACCEPT # iptables -P OUTPUT ACCEPT To restore or turn on firewall type the following command: # iptables-restore < /root/firewall.rules GUI tools If you are using GUI desktop firewall tools such as 'firestarter', use the same tool to stop firewall. System > Administration > firestarter > Click on Stop Firewall button: Featured Articles: 20 Linux System Monitoring Tools Every SysAdmin Should Know My 10 UNIX Command Line Mistakes Top 5 Client For Linux, Mac OS X, and Windows Users Top 20 OpenSSH Server Best Security Practices Top 10 Open Source Web-Based Project Management Software Top 5 Linux Video Editor Software cyberciti.biz/ /turn-on-turn-off-firewal 2/6

3 Want to read Linux tips and tricks, but don't have time to check our blog everyday? Subscribe to our daily newsletter to make sure you don't miss a single tip/tricks. Subscribe to our weekly newsletter here! you@address.com Subscribe FAQ to a friend Download PDF version Printable version Comment RSS feed Last Updated: 12/23/07 { 11 comments read them below or add one } 1 mike at 2:37 pm you can get the status of iptables with the following service iptables status service iptables help gives: Usage: /etc/init.d/iptables {start stop restart condrestart status panic save} 2 Photos of China at 7:29 am I have this error on centos /etc/init.d/iptables save Usage /etc/init.d/iptables {start output_int stop restart status} 3 vivek at 8:19 am Are you sure you got CentOS? Another option is iptables-save > /root/working.fw 4 Flash at 4:06 pm Thanks Guys!!! 5 Robert at 3:32 pm cyberciti.biz/ /turn-on-turn-off-firewal 3/6

4 The easy way to do this is: chkconfig iptables off then to re-enable chkconfig level 345 iptables on 6 joe at 7:56 pm on fedora, once you enabled firwalls/selinux during installation, I can never make nfs boot or ftp works. you can see firewall disabled, iptables disabled, yet no help. Either selinux or fedora GUI has bugs, what I get: Loading: TFTP error 2: Only absolute filenames allowed Failed. to our people, the selinux is a nightmare. forget what the system told you. selinux adds extension to file attributes then some garbage cannot be removed. 7 Amie at 8:32 pm Hi first time here and really need some help! I gave my father in law a netbook for Xmas with Linux as an operating system but cannot connect to Sky broadband. Sky unable to help, any ideas?? 8 Manu Anand at 11:36 pm Hey Amie: Try connecting with a ethernet cable. If that works then try KDE s network manager. HTH Manu 9 Tomas at 3:08 pm Excellent! Really Thanks cyberciti.biz/ /turn-on-turn-off-firewal 4/6

5 10 Ashwani at 1:50 am Thanks for help. FTP can be accessed by stop IP tables. 11 mallikarjun goud at 7:01 am how to stop iptables with out chkconfig iptables off command..plz help me out Leave a Comment Name * * You can use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong> Notify me of followup comments via Submit Tagged as: desktop firewall, disable firewall, fedora core, fedora firewall disable, firestarter, firewall rules, firewall system, gui tools, iptables firewall, linux distribution, linux firewall, malicious users, red hat, root user, suse linux Previous FAQ: Download or install C, C++ compiler on Red Hat Enterprise Linux 5 (RHEL) Next FAQ: Howto Red hat enterprise Linux 5 configure the network card Sign up for our daily newsletter: you@address.com Sign up cyberciti.biz/ /turn-on-turn-off-firewal 5/6

6 Search Software Asset Related FAQs How do I Load / Start RHEL / CentOS / Fedora Linux Iptables Firewall on Computer Boot? How to turn on or off colors in bash Turn on or off color syntax highlighting in vi or vim CentOS / Red Hat / Fedora Linux Turn off Beep / Bell Terminal Sound Test Iptables Script Remotely FAQ Topics Select category Sponsored Links Unified Communications: Thoughts, Strategies and Predictions Join the discussion. IP Convergence Integrate your wireless and wireline networks. Learn how from the experts at Sprint. Wireless & Wireline Integration Thoughts, strategies and solutions: join the discussion Unified Communications 2009 Join the Discussion. Now. Follow us on See your text ad here nixcraft. All rights reserved Privacy Policy Terms of Service Advertise Questions or Comments Sitemap cyberciti.biz/ /turn-on-turn-off-firewal 6/6