Go here for a very good basic of what a firewall actually does.
http://www.wilders.org/firewalls.htm
then take his computer to one or two of these sites and do the port scans.
This will give an overview of some of his vulnerabilities without a
firewall.
http://www.hackyourself.com/startdemo.dyn
http://www.sdesign.com/cgi-bin/fwtest.cgi
http://scan.sygatetech.com/
HTH
Frank
----- Original Message -----
From: "Tally" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, April 12, 2001 1:02 AM
Subject: why firewall ?
> hi list,
>
> i know this must be real elementary but actually i
> was asked this question by a client.
>
> Why would i need a firewall for a NT sytem that is
> not running any servers (web,ftp,telnet), does not
> have any shared drive, has a strong password. Also
> let's say the OS has been hardened as well.
>
> The system is a standalone box (NT workstation) and
> only is used to connect to the Internet. (single
> homed)
>
> To be frank I was at a loss to convinve him to get
> a firewall (i mean a commercial firewall).
> Also we are not talking of any attacks that may be
> launched at the box. Please let me know as to what
> safeguards would a fireall provide in this case.
>
> thanks
> [EMAIL PROTECTED]
>
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