Enable Firewall, But Allow Specific Inbound Connections

[Robert L Cochran]

Gain Paolo Mureddu wrote:

> Robert L Cochran wrote:
>
>> On Fedora Core 3, I want to enable the firewall, permitting inbound 
>> TCP connections from anywhere on port 80. I also want to allow 
>> inbound connections on port 3306 but only from hosts 192.168.1.1 and  
>> 192.168.1.2.
>>
>> It looks like I can't do this from the Applications --> System 
>> Settings --> Security Level GUI. I can allow ports 80 and 3306, but 
>> it doesn't look like I can limit the port 3306 connections to just 2 
>> specific hosts. I would have to craft an IPTABLES script. Am I right 
>> here, and if so, what would be the right way to add specific IPTABLES 
>> rules without interfering with the Security Level applet?
>>
>> Thanks
>>
>> Bob Cochran
>> Greenbelt, Maryland, USA
>>
> I (as the other posters) will recommend you to learn iptables, and if 
> you want a very easy way to configure your firewall and build *quite* 
> complex per-interface rule sets, I'd strongly recommend you take a 
> look at fwbuilder (there are the packages for it in the pre-extras 
> repo [http://fedoraproject.org/pre-extras])
>
Thank you. How do I implement iptables rules without interfering with 
what the Security Level applet sets?

Bob