[isalist] Re: ISA Server 2004 comparison to SonicWall
- From: "Rob Moore" <RMoore@xxxxxxxx>
- To: <isalist@xxxxxxxxxxxxx>
- Date: Thu, 26 Oct 2006 14:51:44 -0400
Well, it's doubtful that that many computers are saturating your
Internet connection. It sounds to me a bit like you have a cache
problem. I recall having those same symptoms you describe, sometime in
the past. Sorry to say I don't remember what I did to fix the problem,
or if it "just went away on its own."
I will say, though, that I have: 3 T1s bonded into one big pipe, 200+
users in the building (MANY of them using the Internet simultaneously)
and a modest box as the firewall (Dell PowerEdge 750). Until we started
saturating our connection, we had no problems with slowness (well,
except when we had those similar symptoms as you describe, but which
went away quite a while back). So I do not think ISA is the problem for
you. It could be some problem on the ISA server, but it's not ISA
itself.
Rob
________________________________
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx]
On Behalf Of Barbara Causey
Sent: Thursday, October 26, 2006 2:43 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA Server 2004 comparison to SonicWall
We have a T1 connection, 13 public Internet computers and 12 staff
Internet computers, but they don't all access the Internet at the same
time.
----- Original Message -----
From: Rob Moore <mailto:RMoore@xxxxxxxx>
To: isalist@xxxxxxxxxxxxx
Sent: Thursday, October 26, 2006 2:09 PM
Subject: [isalist] Re: ISA Server 2004 comparison to SonicWall
You may also want to do some monitoring of your ISA server, most
likely your NIC performance. You might also look at how many pages are
being returned from cache.
How many people do you have using your Internet connection and
how big is your connection?
Rob
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Rob Moore
Sent: Thursday, October 26, 2006 1:49 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA Server 2004 comparison to SonicWall
The vendor will probably tell you that, because ISA is running
on Windows it's more vulnerable than a Sonic Wall firewall, and that
because it's running on Windows it's busier than the Sonic Wall would
be, thus slowing down your connection. He would, of course, be wrong.
Try to figure out where your bottleneck is. You need to do some
monitoring. Packeteer is one (expensive) way to do it. Your router may
have some built in tools for monitoring. Your ISP may be able to give
you some graphs of your Internet usage. We recently did this and found
that our connection was saturated most of the time.
Rob
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Barbara Causey
Sent: Thursday, October 26, 2006 1:22 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA Server 2004 comparison to SonicWall
Thank you Dr. Tom for the info, but if you could point me in the
right direction to see what is causing the slowness then maybe the Boss
wouldn't want to spend the money for the SonicWall! :-)
Thank you!
----- Original Message -----
From: Thomas W Shinder <mailto:tshinder@xxxxxxxxxxx>
To: isalist@xxxxxxxxxxxxx
Sent: Thursday, October 26, 2006 1:03 PM
Subject: [isalist] Re: ISA Server 2004 comparison to
SonicWall
Hi Barbara,
In 99.987% of the cases "network slowness" is not an ISA
problem. The Sonicwall will inherit the same problems that were fasley
attributed to the ISA Firewall.
The vendor should explain how the Sonicwall will solve
this performance problem (which he won't be able to).
Tom
Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
<http://tinyurl.com/3xqb7>
MVP -- Microsoft Firewalls (ISA)
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Barbara Causey
Sent: Thursday, October 26, 2006 11:14 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA Server 2004
comparison to SonicWall
We have been having some problems with slowness
on the network and he is convinced ISA is the culprit and a vendor has
told him SonicWall will fix the problem.
----- Original Message -----
From: Thomas W Shinder
<mailto:tshinder@xxxxxxxxxxx>
To: isalist@xxxxxxxxxxxxx
Sent: Thursday, October 26, 2006 11:57
AM
Subject: [isalist] Re: ISA Server 2004
comparison to SonicWall
The first question would be why would he
want to replace the ISA Firewall with a sonicwall?
Thomas W Shinder, M.D.
Site: www.isaserver.org
Blog:
http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
<http://tinyurl.com/3xqb7>
MVP -- Microsoft Firewalls (ISA)
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Barbara Causey
Sent: Thursday, October 26, 2006 10:48
AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] ISA Server 2004
comparison to SonicWall
Hello List,
The Boss is looking to replace our ISA
Server 2004 with a SonicWall. Will
someone please give me enough
information about this comparison that I can
convince him to keep ISA!
Thank you,
Barbara
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