Ah. That makes sense.

I didn't know if it was a separate piece of hardware or software, or
whatever. I'd seen reference to it in random places, but never
investigated it.

Kurt

On Thu, Jul 14, 2011 at 13:42, Michael B. Smith <[email protected]> wrote:
> URLscan is a DLL module that loads into the IIS process. Technically you 
> could call it MITM, but no more so than a loadable module in Apache.
>
> Insofar as configuring it is concerned - there is specific configuration 
> recommended for Exchange. If you go beyond that configuration (which the OP 
> has), then it specifically warns  that you WILL have issues.
>
> Regards,
>
> Michael B. Smith
> Consultant and Exchange MVP
> http://TheEssentialExchange.com
>
>
> -----Original Message-----
> From: Kurt Buff [mailto:[email protected]]
> Sent: Thursday, July 14, 2011 3:49 PM
> To: MS-Exchange Admin Issues
> Subject: Re: OWA 2003 & URLScan
>
> On Thu, Jul 14, 2011 at 08:13, Osborne, Richard <[email protected]> 
> wrote:
>> I have URLscan installed on my Outlook Web Access 2003 server.  It is
>> set to block '\', '%', and '&' characters in the hope of making the
>> server more secure.  Unfortunately this causes e-mails that use those
>> characters in the Subject not to open.  Am I being unreasonably
>> paranoid?  Do you allow these characters?  Thanks.
>>
>>
>> Richard Osborne
>
> So, this sounds like URLscan MITMs the HTTPS conversation. Did you
> feed it the cert key so that it can decrypt the streams?
>
> I've never played with that product, but those characters are
> deprecated in the RFCs as being unsafe. Too paranoid? I don't think
> so, but this will ultimately be a political call, and you're likely to
> lose, unless you can get them to believe you when you point to the
> RFCs.
>
> Kurt
>
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