[CentOS] Build a Firewall (Can I learn to do this...)

Alan Sparks asparks at doublesparks.net
Thu Oct 1 22:04:59 UTC 2009


Not that it's incredibly difficult to do by hand, but it is a complex
undertaking fraught with some risk in doing it wrong.  I believe you'd
be much better served looking at some of the firewall applications out
there, such as IPCop or Smoothwall.  Another one to look at is Shorewall
(http://www.shorewall.net/), which is not configured via Web GUI, but is
purely text configuration.  I've used Shorewall for several years and
like it a lot...  Tom Eastep did a pretty good job.
-Alan


ML wrote:
> Hi All,
>
> I have a home business circuit and I am gearing up to host my business  
> affairs in my place. I have Comcast and 13 static IP's.
>
> I have an extra PIII 1U, 2 9gb SCSI, 1gb RAMm dual NICS.
>
> So I am wanting to build a firewall to front end my traffic. Assign  
> one of my statics to it and have Comcast statically route my traffic  
> to this IP. Then when traffic comes have it decide if it is allowed or  
> not and if allowed pass it to the right server based upon the rules.
>
> I used to work with PIX 525's so I have knowledge, I just dont quite  
> know how to do this with CentOS and such.
>
> Can anyone offer advice?
>
> Best,
> -Jason
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