Niki,

--- Can anyone advise if theres anything else I should be doing 
or be particularly concerned about? ---

I would encrypt your OWA login process - On our private LAN, we have OWA
installed on an NT4 box (with IIS).  Our firewall forwards port 443 (SSL) to
it.  On this box, we issued ourselves a certificate and have the client
answer yes to the Security alert.  All this to ensure that the clients
credentials are encrypted.   We have no proxy server in this loop.  Can you
change OWA to port 443 and then block port 80 at the firewall?

Devin L. Meade, CNE, MCP
Network Administrator
Frankfurt-Short-Bruza
www.fsb-ae.com
www.oklahomadome.com
 
 
-----Original Message-----
From: Niki Blowfield - Winnt [mailto:[EMAIL PROTECTED]] 
Sent: Monday, January 27, 2003 10:46 AM
To: NT 2000 Discussions
Subject: Repeated attempts to log into IIS

Hi

We have an IIS4 server on our private LAN, port 80 traffic is 
forwared to it from the firewall as it is our OWA server, it 
is also our MS Proxy Server

Its been used as an anonymous proxy from unauthorised users 
based externally despite me trying a number of things to stop 
this as advised from some kind soul on one of the MS newsgroups

Instead, I've moved proxy server to another server, although 
the 1st server will remain as our OWA server

Today, I've noticed hundreds of failed attempts to log into 
this server, which if you try to connect to it, just displays 
the generic IIS4 sample website.

With the addition of the \exchange subdirectory, you 
obviously get the OWA log in

I assume this is a consequence of the machines use as an 
anonymous proxy, but its a little disconcerting to be honest. 
I'm happy the machine is patched, and I don't think anything 
could be done if someone guessed a domain user login/password

Can anyone advise if theres anything else I should be doing 
or be particularly concerned about?

Thanks a lot

Nik

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