You can surely find a list of firewalls in the market. But by my
personal experience here is what I would shortlist.
Open Source:
--------------
(1)IPtables based solutions: Grab a PC, install Fedora Core as you
thought of and a management software such as Fwbuilder
http://www.fwbuilder.org/
This is a very nice way of managing Linux based firewall, you can
manage more than 1 firewall boxes from same fwbuilder console. If there
is one box to maintain install iptabes/fwbuilder on the same box.
This will give you a enough flexibility to use the power of Linux (OS),
as sometimes you want to run extra stuff such as proxy arp, small
servers such as dhcp, dns etc. All can be run on the same server with
appropriate FW rules to control access. You can run this on very cheap
hardware as long as you can install OS on that.
There is some initial time investment here, for setting up firewall, Log
collections and analysis etc.
(2)Think of a cooked solutions such as IPCOP (www.ipcop.org), Smoothwall
(http://www.smoothwall.org/) etc. This will give you a boot CD and quick
FW setup. There are already several out of the box tweaks available for
these. For home users and small setup these are perfect.
Commercial:
------------
(3) Checkpoint, Netscreen, Linksys all these have low cost entry level
firewalls at their web site. Most of these offer good firewall support
plus VPN access capabilities out of the box. However you are bound by
the offerings capabilities. Most of the time when you want some useful
thing from your firewall they always ask you to pay more to upgrade to
the higher paid version. So it is trap sometimes, if you don't know
exactly what you are buying here.
In my view if you have Linux/OS level expertise then go for one of the
first two options above.
I wouldn't go for the cheap Linksys router/NAT box stuff (found in
Staples, Wal-mart) , they are too limited and you will end up pulling
your hairs if you expect decent functionality from those models.
Hope this helps.
Rajeev K
rmillisl@millis-it.com wrote:
I have been asked to research what good, low cost, firewall solutions
might prove suitable for a medical research lab at a local University to
protect confidential patient data from outsiders.
In addition to other research I though I would ask here.
I realize a firewall is just one component of an overall security policy /
implementation.
Basically what is needed is a simple NAT box that generally keeps
outsiders out, and allows authorized lab servers and workstations to
access certain services out on the main building network (DNS, IMAP, POP,
SMTP, HTTP, HTTPS, FTP, SSH) and through that network to the Internet
(through the main building campus/network).
Cost is a very important factor so suggested solutions have been:
- Pay someone to set up a PC based firewall running on surplus hardware
using either Fedora Core 5 and Shorewall 3.0.6 (to allow easy
configuration of iptables rules). The hardware and software cost are low.
The time could add up. I have considerable experience with this so this
would be the lowest learning curve. Problem is Fedora with its frequent
updates may make managing this more of a chore.
- Pay someone to set up a a PC based firewall running on surplus hardware
using either OpenBSD 3.7 or 3.8 and pf. The hardware and software cost are
low. The time could add up. I have some OpenBSD experience and no pf
background.
- Pay someone to set up a a Linksys or D-Link broadband
switch/firewall/router. The hardware cost is low. The time to set up may
be minimal (Plug&Play + some common sense and provided firewall/filter
capabilities). Are these a serious and secure enough solution?
- Some other low cost hardware or software based alternative. What else
might be out there that I don't know about that might be comparable in
cost to the D-Link or Linksys options.
The PC based solutions I personally have the most confidence in with
respect to hand crafting a minimal OS build and hardening and patching the
OS and doing rules mostly by hand. With pf there is some concern of errors
introduced due to learning curve.
Comments? Suggestions?
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