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04/22/2009 at 09:53PM PDT, ID: 24347841
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7.8

ISA Server has encountered a proxy chain loop

Asked by chimp153 in Network Software Firewalls, Windows Network Security, Enterprise Firewalls

Tags: ISA Server, Proxy Server

Hi there all,

I am having a problem with my ISA box in that I continually get Event 14141 for Microsoft ISA Server Web PRoxy (ISA Server has encountered a proxy chain loop.) and then no one can get on the internet.  I have just had to install ISA from scratch and the NIC details are as follows:

Internal NIC:

IP Address :  192.168.0.2
Mask: 255.255.255.0
Gateway : 192.168.0.2
Primary DNS: 192.168.0.1 (internal DNS server and Primary DC)
Seconday DNS : 10.0.0.1 (ip of ADSL router)

External NIC
IP Address: 10.0.0.2
Mask: 255.255.255.0
Gateway: 10.0.0.1
Primary DNS: 10.0.0.1

If anyone has any ideas on what would be causing this problem I would greatly appreciate it.   The other thing is I cannot nslookup internal computers from the ISA Server.  This Server is a member of our domain.

thanks
Darren
[+][-]04/22/09 11:20 PM, ID: 24212181

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About this solution

Zones: Network Software Firewalls, Windows Network Security, Enterprise Firewalls
Tags: ISA Server, Proxy Server
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Solution Provided By: rslangen
Participating Experts: 3
Solution Grade: A
 
 
[+][-]04/23/09 12:32 AM, ID: 24212498

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[+][-]04/24/09 03:48 AM, ID: 24223592

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[+][-]04/27/09 03:36 PM, ID: 24246367

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[+][-]04/27/09 03:37 PM, ID: 24246377

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