FW: Linux Firewall Problem

FW: Linux Firewall Problem

[Paul Collen]

Hello,

I'm new to Linux and I've inherited a Webmin controlled firewall. I'm
used to using a SonicWall firewall and just can't seem to get the hang
of the Linux firewall. My problem is I need to allow Outlook Web Access
through to a server. OWA is installed and can be used internally by
going to the server i.e. http://server/exchange We have an IP address I
can use to connect with but I just can't seem to let any traffic through
to the server, let alone just port 80 and 443. Are there any firewall
gurus that can give me some help please?

Cheers,

Pablo

Re: FW: Linux Firewall Problem

[John A. Sullivan III]

On Tue, 2005-11-22 at 11:23 +0000, Paul Collen wrote:
> Hello,
> 
> I'm new to Linux and I've inherited a Webmin controlled firewall. I'm
> used to using a SonicWall firewall and just can't seem to get the hang
> of the Linux firewall. My problem is I need to allow Outlook Web Access
> through to a server. OWA is installed and can be used internally by
> going to the server i.e. http://server/exchange We have an IP address I
> can use to connect with but I just can't seem to let any traffic through
> to the server, let alone just port 80 and 443. Are there any firewall
> gurus that can give me some help please?
<snip>
I was in a similar position many years ago and found there are excellent
tutorials available to help one understand iptables.  In most cases, I
found it to be far more powerful and flexible than other proprietary
systems.  Many tutorials are listed on the netfilter web site.  There is
an excellent one at
http://iptables-tutorial.frozentux.net/iptables-tutorial.html
You can also find some training slide shows in the training section of
http://iscs.sourceforge.net although these are a little out of date.
Good luck and welcome to the world of netfilter and iptables! - John
-- 
John A. Sullivan III
Open Source Development Corporation
+1 207-985-7880
jsullivan@opensourcedevel.com

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