Re: Firewall on server itself

["Craig Janssen" <cjanssen () mail millikin edu>]

Normally what I do (this applies to *nix servers as well as Win2k
servers, which have IP security policies that essentially function as a
built-in firewall) is I allow connections in on the services the server
is meant to provide to the public (i.e. port 80 and 443 for web servers)
and block everything else, unless the origin IP is in the same subnet as
the rest of your servers, in which case it might make sense to allow
more ports through so you can do backups, file transfers and whatnot
between servers.

Craig

______________________________
Craig Janssen, MCP, A+
Network and Internet Services Manager
Millikin University Information Technology Dept
(217) 362-6488
cjanssen () mail millikin edu

> > > Justin Pryzby <justinpryzby () users sf net> 06/25/03 10:38AM >>>
Sure, you could set up the hardware firewall to do general pupose
filtering (don't pass mallicious icmp, block the virus-of-the-day
port,
etc) and then set the individual hosts' firewalls to do things like
"allow only establisted connections and connections to tcp:80, plus
connections to tcp:22 from privileged hosts".  That one would make
sense
for your webserver.

Justin

On Wed, Jun 25, 2003 at 06:34:02PM +0000, Anish Basu wrote:
...
> Are there any advantaqes or disadvantages to having two firewalls set
up
> this way?
>
> Thanx in advance for any help.

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