[isalist] Re: ISA server problem - connection refused.
- From: "Stuart Tonge" <stuart.tonge@xxxxxxxxxxxx>
- To: <isalist@xxxxxxxxxxxxx>
- Date: Wed, 19 Apr 2006 16:08:30 +0100
Thanks for the info tom.
No im not using autoconf or discovery - but I will try them both.
Topology:
LAN - ISA server - Firewall - Router - ISP
________________________________
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx]
On Behalf Of Thomas W Shinder
Sent: 19 April 2006 15:04
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA server problem - connection refused.
Hi Stuart,
Are they configured to use the autoconfiguration script? If not, try
that. You can also use wpad autodiscovery which will have the same
result.
Make sure to enable autodiscovery publishing on the ISA firewall.
Is the ISA firewall in parallel with the existing firewall solution?
What does the relevent network topology look like?
Thanks!
Tom
Thomas W Shinder, M.D.
Site: www.isaserver.org <http://www.isaserver.org/>
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP -- ISA Firewalls
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Stuart Tonge
Sent: Wednesday, April 19, 2006 8:50 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA server problem - connection refused.
Hi Tom
Nah its dual NIC - no need for the prozac just yet :-)
I have the clients setup to point to the proxy (which I've left
to the default of ip-address: 8080)
I have enabled 1.1 through proxies.
The problem persists however.
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Thomas W Shinder
Sent: 19 April 2006 14:44
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA server problem - connection refused.
Hi Stuart,
OK, in that case, I won't jump out the window today (I always
get clinically depressed when I see a hork mode [single NIC] ISA
firewall deployment)
Configure the clients as Web proxy clients and enable HTTP 1.1
through proxy connections in the browsers.
HTH,
Tom
Thomas W Shinder, M.D.
Site: www.isaserver.org <http://www.isaserver.org/>
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP -- ISA Firewalls
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Stuart Tonge
Sent: Wednesday, April 19, 2006 8:13 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA server problem - connection
refused.
Yes it's paid for.
I didn't deploy it as the front line firewall since this
is the first isa 2004 server I've deployed out of test environments.
I was going to trial it as the primary, but with all the
problems it's caused thus far im not sure I trust it any longer.
When the existing problem is resolved, I will likely
trial it.
But first I need to get the web working properly.
I will try sniffing the wire and removing the perimeter
firewall to see if that resolves any problems.
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Thomas W Shinder
Sent: 19 April 2006 14:09
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA server problem - connection
refused.
But the ISA firewall is surely more secure than what
you're using?
Why waste the security you paid for (I assume you paid
for the ISA software?)
Thomas W Shinder, M.D.
Site: www.isaserver.org <http://www.isaserver.org/>
Blog: http://blogs.isaserver.org/shinder/
Book: http://tinyurl.com/3xqb7
MVP -- ISA Firewalls
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Stuart Tonge
Sent: Wednesday, April 19, 2006 7:35 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA server problem -
connection refused.
Hi Amy.
Not connection limits - I've disabled any
limits.
DNS works just fine for everything else, and
lookups work in general. Both simple and recursive.
It's not intended to protect - I have existing
hardware firewalls deployed which do the job just fine.
All I want it to do is proxy.
If I have time to reconfigure & learn ISA more
fully after the project then I'll reconfigure it.
Right now I just want it to not cause me
problems.
Can you suggest any resolutions to the problem?
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Amy Babinchak
Sent: 19 April 2006 13:21
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] Re: ISA server problem -
connection refused.
Might be connection limits or a problem with
your DNS or workstation setup in general. Just from the brief
description you gave of your ISA configuration it sounds like it might
not be set up properly at all. Firewalls don't interfere, they protect.
Amy
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Stuart Tonge
Sent: Wednesday, April 19, 2006 7:25 AM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] ISA server problem -
connection refused.
Hi all.
I have an ISA server 2004 box deployed as a web
proxy.
I have set an allow any-any rule to stop the
firewall interfering.
I have my users proxying through this box to the
web.
It works 95% of the time. The rest of the time,
i get a 10061 connection refused error.
If i refresh the page, it generally refreshes
the first time.
This happens on many sites & has been seen
nmultiple times on microsoft.com, bbc.co.uk, isaserver.org.
Sometimes images do not load on a page, but this
is fairly rare, and some of the images may load.
Some will load, some will not.
I have tried to isolate 'problem sites' but this
has not worked - the error seems totally random.
The only common occurance I have noted is that
after one error, some clients - not all - seem to have trouble
connecting to any site for the next 30-60
seconds, instead receiving the error over and over.
I have only seen this on 2 of 40 clients.
I have tried disabling all web filter add-ins,
caching, ip routing, ip filtering, etc.
Basically i've tried every button i can find in
ISA 2004! nothing makes the problem better.
It's also hard to test since it's intermittent.
The ISA server is directly connected to a
firewall which filters traffic, but this device works fine 100% of the
time when
web traffic passed via it instead of ISA.
ISA is reporting no errors in the console. There
are no errors in the syslogs.
Does anyone have any ideas short of uninstalling
ISA & getting a refund?
Thanks,
Stuart Tonge
Pink Fish I.T. LTD
Network Architect
stuart.tonge@xxxxxxxxxxxx
http://www.pink-fish.tv
01302 365408
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