RE: XCompress for ISA -- Compression Filter

  • From: "Wayne Berry" <wayne@xxxxxxxxxx>
  • To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
  • Date: Fri, 9 Jul 2004 16:11:28 -0700

Tom,

As long as the HTTP Security Filter runs first, and XCompress for IIS second
there shouldn't be an issue.  In other words, the issues you are taking
about are when the web server does the compression.  Just a note here that
between the ISA server and the web server (OWA Server) the communication is
NOT compressed.  It is just the communication between the client and the ISA
server.

-Wayne 

-----Original Message-----
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx] 
Sent: Friday, July 09, 2004 4:07 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: XCompress for ISA -- Compression Filter

http://www.ISAserver.org

Hi Wayne,

Does this solve the OWA publishing issue with ISA 2004 and FBA? That is to
say, can we enable compression on the published OWA site and still use the
ISA FBA feature? What is the effect on exposing the communications to the
HTTP Security filter when the data is compressed?
From my understanding, compressing the data making it inaccessible to the
security filters.

Thanks!

Tom
www.isaserver.org/shinder
Get the book!
Tom and Deb Shinder's Configuring ISA Server 2004
http://tinyurl.com/3xqb7
MVP -- ISA Firewalls



-----Original Message-----
From: Wayne Berry [mailto:wayne@xxxxxxxxxx]
Sent: Friday, July 09, 2004 4:00 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: XCompress for ISA -- Compression Filter


http://www.ISAserver.org

Found the Google Article For Those That Are Interested:

http://www.httprevealer.com/usage_gzip.htm

-Wayne 

-----Original Message-----
From: John Tolmachoff (Lists) [mailto:johnlist@xxxxxxxxxxxxxxxxxxx] 
Sent: Friday, July 09, 2004 1:49 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: XCompress for ISA -- Compression Filter

http://www.ISAserver.org

> do is provide compression.  With the XCompress for ISA, compression is
done
> on the ISA server by our filter.

OK, meaning that XCompress now is one of the ends, got it.

> Q: What is the purpose/benefit of compressing at the firewall?
> A: Well firewall compression might not be that interesting, unless you

> are using your ISA server for a reverse proxy or forward proxy.
> 
> Let's say your ISA is set up as a proxy server for the outbound 
> Internet
at
> your Coporate headquarters in New York, and you have a WAN where your
branch
> office is in LA.  The branch office connects via a partial frame via 
> VPN
to
> coporate that provides outbound access.  If you install XCompress for 
> IIS
in
> NY, it will compress all the Internet responses from the outside, 
> making
the
> partial frame faster, and the VPN encryption quicker.
> 
> Or, you have a ISA server in front of your web server, as a 
> firewall/proxy/cache, and you want to compress that traffic before it
leaves
> your data center.  Install XCompress for IIS, and the outbound traffic

> is reduced and your bandwidth bills goes down.

Did not think of either of those 2 scenerios. Too much going on right
now.

> Q: How will that speed up traffic or reduce bandwidth usage?
> A: Is this question answer by the above?

Yes.

John Tolmachoff
Engineer/Consultant/Owner
eServices For You



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