Win95 lockdown software and Netscape Mail

[David Risner]

On Fri, 4 Apr 1997, Bob Jones wrote:

> 
> Does anyone know if any of the Win95 lockdown security software products
> has the capability to suppress commands controlling incoming mail while
> still enabling the capability to send email from the Netscape browser?  My
> objective is to permit students access to send mail to their professors
> (from the class web pages) while trying to discourage others from using
> the Library's browser for accessing their campus email.  (I know, they can
> still do it from HotMail, etc.) I am currently using router blocks from
> certain IP address ranges to the campus mail server, but I am being
> "encouraged" by faculty to permit sending email.  Thanks. 

Assuming you have a Unix mail server, what about using TCP Wrappers, or
equivalent, to block access to the POP3 port from those machines?  You
could keep the SMTP port available so outgoing mail still works.

Or, if you have more than one Unix machine, you could set up the sendmail
on another machine to just forward messages on to the mail server.  You
would set the outgoing (SMTP) mail server on the Win95 machines to point
to this second Unix machine and then block access to the actual mail
server using your favorite scheme.

Another solution would be to edit the Netscape.exe file to not allow the
changing of the POP3 login name and/or the name of the Incoming (POP3) 
server. Just make sure that the registry entry where Netscape stores the
POP3 login name does not contain a valid login name for the mail server
and/or the entry for the incoming server is invalid. (Disclaimer -- you
are supposed to get permission from Netscape before embarking on such a
course).

---
David G. Risner -- Network Systems Administrator
Southwestern University School of Law, Los Angeles, CA
Business: drisner at swlaw.edu Personal: dgrisner at netcom.com
Home Page: http://www.geocities.com/SouthBeach/Sands/8326/