RE: Boku upstream unavailable alerts
- From: "Thomas W. Shinder" <tshinder@xxxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 13 Aug 2002 16:24:35 -0500
Hi Shawn,
Hmmm. OK, I just use a little different nomenclature. Tomato/Tomaaato
:-)
It might be that the upstream is a little slow in responding, since it
happens when the server is busy. Does the packet filter log show
anything interesting?
Thanks!
Tom
Thomas W Shinder
www.isaserver.org/shinder
-----Original Message-----
From: Quillman Shawn (RBNA/CIT7) [mailto:Shawn.Quillman@xxxxxxxxxxxx]
Sent: Tuesday, August 13, 2002 1:54 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Boku upstream unavailable alerts
http://www.ISAserver.org
Hi Tom,
It is a proxy chain (at least that's how I've always referred to it and
seen
it referred to). Here's the picture:
Client --> ISA (cache only) --> Non-ISA Firewall's HTTP Proxy
-Shawn
-----
Shawn R. Quillman
Robert Bosch Corporation RBNA/CIT7
38000 Hills Tech Drive
Farmington Hills, MI 48331
(248) 553-1164 (P) (248) 848-2855 (F)
shawn.quillman@xxxxxxxxxxxx
-----Original Message-----
From: Thomas W. Shinder [mailto:tshinder@xxxxxxxxxxxxxxxxxx]
Sent: Tuesday, August 13, 2002 2:43 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Boku upstream unavailable alerts
http://www.ISAserver.org
Hi Shawn,
Sort of a "pseudo" chain, since I believe only Firewall chaining is
actual chaining. When you don't have direct communication with the
upstream Web Proxy service, you're not chaining, you're just a SecureNAT
client. Is that the case?
Thanks!
Tom
Thomas W Shinder
www.isaserver.org/shinder
-----Original Message-----
From: Quillman Shawn (RBNA/CIT7) [mailto:Shawn.Quillman@xxxxxxxxxxxx]
Sent: Tuesday, August 13, 2002 1:30 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Boku upstream unavailable alerts
http://www.ISAserver.org
Yes, sorta. The ISA's the only thing that caches. More of a chain than
a
hierarchical cache.
-Shawn
-----
Shawn R. Quillman
Robert Bosch Corporation RBNA/CIT7
38000 Hills Tech Drive
Farmington Hills, MI 48331
(248) 553-1164 (P) (248) 848-2855 (F)
shawn.quillman@xxxxxxxxxxxx
-----Original Message-----
From: Thomas W. Shinder [mailto:tshinder@xxxxxxxxxxxxxxxxxx]
Sent: Tuesday, August 13, 2002 2:06 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Boku upstream unavailable alerts
http://www.ISAserver.org
Hi Shawn,
As you using hierarchical Web proxy caching?
Thanks!
Tom
Thomas W Shinder
www.isaserver.org/shinder
-----Original Message-----
From: Quillman Shawn (RBNA/CIT7) [mailto:Shawn.Quillman@xxxxxxxxxxxx]
Sent: Tuesday, August 13, 2002 11:29 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] Boku upstream unavailable alerts
http://www.ISAserver.org
I am getting monstrous numbers of 'The Web Proxy service detected that
the
upstream proxy 'xxxx' is not available.' alerts, sometimes in the
neighborhood of 10 / second. It mostly happens around lunch which is of
course the busiest time for the proxy. Anyone know exactly fires those
events? Is it simply a failed connection when trying to forward a
request
or what? Do I need to tune the ip stack on the box maybe? Nobody's
griping
about degraded services (thank God), but I want to fix the problem so
that
it doesn't escalate into end-user-griping.
-Shawn
-----
Shawn R. Quillman
Robert Bosch Corporation RBNA/CIT7
38000 Hills Tech Drive
Farmington Hills, MI 48331
(248) 553-1164 (P) (248) 848-2855 (F)
shawn.quillman@xxxxxxxxxxxx
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