Re: [Sheflug] Firewalls for SuSE 9.0

[Simon Instone <simon [at] xxxxxxxxxxxxxx>]

>  
> AFAIK Linux firewalls all utilise the kernels own packet filtering 
> capabailities using the standard user space toolkit iptables or ipchains from 
> http://www.netfilter.org  ( does this make all Linux firewalls Turing 
> equivalent ? ) 
>  
I knew Linux firewalls used iptables.  I liked the Guarddog GUI which 
lists just about every port used by different software and you can 
choose whether to switch on ports for incoming only, outgoing only or 
both either on or off.  The SuSE firewall has a very basic GUI so if you 
want to configure the same ports you need to know how to edit all the 
necessary config files, which I don't know.

One example I can think of with the SuSE firewall and opening ports; I 
had to open up port 21 because I couldn't download files from FTP 
servers but the SuSE firewall has opened it up for both incoming and 
outgoing traffic.  If it were a more advanced GUI it could give me the 
ability to open up port 21 for outgoing traffic only.
The strange thing about this is that I could used gFTP to FTP out 
without opening up the port but Firebird wouldn't connect to any FTP 
servers until I opened the port.  Strange!

Simon
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