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RHEL 4 firewall
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nattiebo
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Post Posted: Wed Jun 27, 2007 9:44 am   Post subject: RHEL 4 firewall Reply with quote Back to top  
How can I disable a firewall in rhel 4 through the command line. How do I know what firewall is running??? HELP, please!

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CMTG
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Post Posted: Wed Jun 27, 2007 11:35 am   Post subject: Re: RHEL 4 firewall Reply with quote Back to top  
nattiebo wrote:
How can I disable a firewall in rhel 4 through the command line. How do I know what firewall is running??? HELP, please!


A stock RHEL installation uses iptables. The text mode config utility is:

Code: Select all
#  system-config-securitylevel-tui


For reference, the gui utility is just:

Code: Select all
#  system-config-securitylevel


If you don't have these on your system, just do a:

Code: Select all
#  yum install system-config-securitylevel system-config-securitylevel-tui

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squashman
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Post Posted: Wed Jun 27, 2007 1:19 pm   Post subject: Reply with quote Back to top  
I remember doing this with 2 simple commands many years ago, but I haven't run a Linux box in a couple of years.

I just googled to find this. Seems to be a little over kill.
http://www.faqs.org/docs/iptables/rcflush-iptablestxt.html


I would think you could do something simple like this.
iptables -F
iptables -A "chain" ACCEPT

But according to this website
Quote:
RedHat enterprise Linux and Fedora Core (FC) / Centos Linux comes with pre-installed script which can be used to stop the firewall:
#/etc/init.d/iptables stop

http://www.cyberciti.biz/tips/linux-iptables-how-to-flush-all-rules.html
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Nesarin
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Post Posted: Wed Jun 27, 2007 8:17 pm   Post subject: Reply with quote Back to top  
squashman wrote:
I remember doing this with 2 simple commands many years ago, but I haven't run a Linux box in a couple of years.

I just googled to find this. Seems to be a little over kill.
http://www.faqs.org/docs/iptables/rcflush-iptablestxt.html


I would think you could do something simple like this.
iptables -F
iptables -A "chain" ACCEPT

But according to this website
Quote:
RedHat enterprise Linux and Fedora Core (FC) / Centos Linux comes with pre-installed script which can be used to stop the firewall:
#/etc/init.d/iptables stop

http://www.cyberciti.biz/tips/linux-iptables-how-to-flush-all-rules.html


DITTO to that. works every time, those crazy init.d scripts. Or of course if you wanted to see what iptables is actually doing, I think the file is /etc/sysconfig/iptables

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CMTG
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Post Posted: Thu Jun 28, 2007 2:55 am   Post subject: Reply with quote Back to top  
You guys don't half like making life hard for yourselves... The system-config-securitylevel-tui tool that comes with RHEL comes with a giant "disable" button for the firewall right in the middle of the screen. Wink

_________________
Pie. I wish I could
constrain my hungry greed but...
Sadly, defeated.

Charlene's Law: There's no such thing as can't.
Charlene's Corollary: Unless it's followed by be arsed.

If only 20% of your staff is programmers, and you can save 50% on salary by outsourcing programmers to India, well, how much of a competitive advantage are you really going to get out of that 10% savings?
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soup4you2
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Post Posted: Thu Jun 28, 2007 5:00 am   Post subject: Reply with quote Back to top  
/etc/init.d/iptables stop

or

/sbin/service iptables stop

Quote:

If you don't have these on your system, just do a:

Code:
# yum install system-config-securitylevel system-config-securitylevel-tui


i dont think rhel comes stock with yum, i think FC5 does but FC4 uses up2date

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Nesarin
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Post Posted: Thu Jun 28, 2007 7:39 am   Post subject: Reply with quote Back to top  
soup4you2 wrote:


i dont think rhel comes stock with yum, i think FC5 does but FC4 uses up2date



Agreed, no yum until 5, only up2date

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squashman
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Post Posted: Thu Jun 28, 2007 9:59 am   Post subject: Reply with quote Back to top  
CheeseMonger The Great wrote:
You guys don't half like making life hard for yourselves... The system-config-securitylevel-tui tool that comes with RHEL comes with a giant "disable" button for the firewall right in the middle of the screen. Wink

Is that a GUI. Because I have never installed any GUI on any of my RH boxes. I learned to do everything cmd line. But the last version of Red Hat I used was version 9.
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CMTG
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Post Posted: Fri Jun 29, 2007 4:46 am   Post subject: Reply with quote Back to top  
squashman wrote:
CheeseMonger The Great wrote:
You guys don't half like making life hard for yourselves... The system-config-securitylevel-tui tool that comes with RHEL comes with a giant "disable" button for the firewall right in the middle of the screen. Wink

Is that a GUI. Because I have never installed any GUI on any of my RH boxes. I learned to do everything cmd line. But the last version of Red Hat I used was version 9.


CheeseMonger The Great wrote:
The text mode config utility is:

Code: Select all
#  system-config-securitylevel-tui


For reference, the gui utility is just:

Code: Select all
#  system-config-securitylevel



(The T in TUI stands for text. Wink)

I don't know if they're in RH9, but they definitely come with RHEL4. Like Soup says, use up2date to install it if you don't have it, not yum. (I'm spoiled by CentOS, obviously.)

_________________
Pie. I wish I could
constrain my hungry greed but...
Sadly, defeated.

Charlene's Law: There's no such thing as can't.
Charlene's Corollary: Unless it's followed by be arsed.

If only 20% of your staff is programmers, and you can save 50% on salary by outsourcing programmers to India, well, how much of a competitive advantage are you really going to get out of that 10% savings?
View user's profile Send private message Send e-mail Visit poster's website
squashman
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Post Posted: Fri Jun 29, 2007 6:19 am   Post subject: Reply with quote Back to top  
I guess I would just rather type iptables stop
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nattiebo
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Post Posted: Fri Jun 29, 2007 8:35 am   Post subject: Reply with quote Back to top  
Thanks, ya'll! I'll give those a shot when I'm back in the office on Monday! Smile

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