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
# 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:
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{ 24 comments… read them below or add one }
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}
how to insatall CentOS 4.3 in VMWere
Same as on a machine…
I have this error on centOS
/etc/init.d/iptables save
Usage /etc/init.d/iptables {start|output_int|stop|restart|status}
Are you sure you got CentOS? Another option is
iptables-save > /root/working.fwThanks Guys!!!
The easy way to do this is:
chkconfig iptables off
then to re-enable
chkconfig –level 345 iptables on
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.
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??
Hey Amie:
Try connecting with a ethernet cable.
If that works then try KDE’s network manager.
HTH
Manu
Excellent!
Really Thanks
Thanks for help….
FTP can be accessed by stop IP tables.
how to stop iptables with out chkconfig iptables off command………………..plz help me out
Thanks All Of you
Hi,
I have a problem starting iptables:
[root@myserver ~]# /etc/init.d/iptables start
[root@myserver ~]# /etc/init.d/iptables status
Firewall is stopped.
[root@myserver ~]# rpm -q iptables
iptables-1.3.5-5.3.el5_4.1
Please help me solve this problem.
Thanks!
Alex
how can we stop the iptables service in ubuntu???
i have tried “services iptables stop” but it is giving “unrecognized service”.
is there any other command or method to do so???
/etc/init.d/iptables status
if running than to stop
/etc/init.d/iptables stop
HI,
I am very confused about iptables status.
I stopped my iptables by running ” service iptables stop”, later on i checked wheter it is really running or not by running “service iptables status”. It shows me ” Firewall is disabled”. If I run iptables -L it shows me the list of INPUT/OUTPUT/FORWARD Chains. If again i will run ” service iptables status” it will show me againall chains. What it really means, does iptables start auutomatically when I type ” iptables -L”? Please reply lots of confusion!!!
Thanks in advance.
Vijay
dear sir ,
how can i configure the firewall
I make iptable stop but not start it
>>
[root@FreeSX ~]# /etc/init.d/iptables start
Applying iptables firewall rules: iptables-restore: line 1 failed
[FAILED]
[root@FreeSX ~]# /etc/init.d/iptables status
Firewall is stopped.
>>
plz help me as soon as possible
thks!!!!!!
Debian Stable doesn’t seem to have an init.d script, or the services application, or the chkconfig application. How does one start/stop/restart the iptables service on Debian?
Thankss a lot ………………………….. gud to learn
To stop firewall during bootup aka permanently
[root@ssd optimized]# chkconfig –list | grep iptables
iptables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
[root@ssd optimized]# chkconfig –level 345 iptables off
[root@ssd optimized]# chkconfig –list | grep iptables
iptables 0:off 1:off 2:on 3:off 4:off 5:off 6:off
Excellent!
Thanks for all.