Hi Simon, SBS always creates some hurdles, but you can install the Message Screener on the SBS machine and filter out file extensions. I don't have the procedure on the Web site for a co-located Exchange/ISA Server, but it is in the ISA Server and Beyond book. The book needs a bump in the ratings at amazon.com, so go for it ;-) HTH, Tom Thomas W Shinder www.isaserver.org/shinder ISA Server and Beyond: http://tinyurl.com/1jq1 Configuring ISA Server: http://tinyurl.com/1llp -----Original Message----- From: Simon Weaver [mailto:Simon.Weaver@xxxxxxxx] Sent: Thursday, August 21, 2003 4:44 PM To: [ISAserver.org Discussion List] Subject: [isalist] the SoBig Worm - what should I expect to see..... http://www.ISAserver.org Hi everyone I was in the process of getting a new client over to SBS2000, as they are currently using Win2k / Exchange / Proxy 2.0 However I was called in due to the fact they "believe" they are infected with the SoBig.f Virus. However a complete scan of the Server / PC's and patching all machines proved there was no trace of the virus. However, they are getting inundated with hundreds upon hundreds of emails that is being picked up by the AV Symantec Program and sending the Emails out with a Quarantine Attachment. However people are also saying they are "receiving" Emails from the users in this LAN to external recipients with a virus attached! I do not believe it - But is this the behaviour of this new virus. Also, am I right in thinking if I get SBS2k / ISA up and running I can filter out .scr / .exe / .pif files?? Any advise is welcome :-) Simon Weaver Technical Consultant MCSE+Internet / MCSE Windows 2000 Integrated Solutions Corp. Ltd http://www.iscl.net