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CentOS 6 iptables utility

Posted on 2015-01-18
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Last Modified: 2015-01-19
I just put together a CentOS 6.5 system.  The firewall is blocking most things it appears.  A couple of questions.  I also have an Ubuntu system and both computers have Webmin on them.

1. I have an Ubuntu system that is running fine with iptables set up as I need it.  Is there a way to copy the tables from Ubuntu, edit it to change the IP addresses, and then use it on CentOS?

2. Ubuntu has the Firestarter utility that makes it very easy to set up the iptables firewall.  Is there a similar program for CentOS 6?  I haven't been able to find one.
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Question by:Dave Baldwin
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savone earned 500 total points
ID: 40556210
Although I do not use Ubuntu, you should be able to find a file containing your rules in /etc/iptables/rules.v4.

If you copy that file to the CentOS machine and place it in /etc/sysconfig/iptables that will effectively "copy" the iptables rules from Ubuntu to CentOS.  After copying the files issue the "service iptables restart" command to read the new rules.

As for a GUI for iptables, I never heard of firestarter.  I have seen people use fwbuilder as a GUI front end for iptables.

Try this:

yum install fwbuilder -y
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by:Dave Baldwin
ID: 40556485
Thanks, I'll check out fwbuilder.
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by:Dave Baldwin
ID: 40556616
I don't see '/etc/iptables' on either computer.  ??  I installed FWBuilder on CentOS but it wants to know where the 'iptables' are located to import them.
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by:savone
ID: 40556665
You won't see it on the centos system because the path is /etc/sysconfig/iptables not /etc/iptables.

As for Ubuntu, I don't use it. Bit quick research says it should be /etc/up tables.rules.
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by:Dave Baldwin
ID: 40556710
Ok, thanks, that's where they were.  Now to figure out what I need to do.
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by:savone
ID: 40556766
You can copy the file from Ubuntu to CentOS and put it in the location I specified.
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by:Dave Baldwin
ID: 40556830
That's what I'm going to do.  Then I'll open it in FWBuilder and restart the iptables function with it.  I've already edited the file to change the necessary IP addresses.  Fortunately, SSH was working so I could copy the file from Ubuntu to CentOS.  FTP and HTTP aren't working because until I do this changeover, there are no rules to allow them.
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by:savone
ID: 40556853
Sounds like you are on your way.  Good luck.
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by:Dave Baldwin
ID: 40558776
I have one last problem with FWBuilder not being able to login with SSH but I'll figure that out.  Thanks for you help.
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