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03.17.2008 at 02:57PM PDT, ID: 23248625
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7.4

ISA 2004 On SBS2003 - Error Code 12206: Proxy chain loop

Asked by cybis1 in MS Internet Security & Accel, SBS Small Business Server

I am having trouble with ISA server - all of a sudden I am getting an error message :
Error Code 12206: Proxy chain loop
Background: The gateway has detected a proxy chain loop. This condition might indicate a configuration problem on a proxy server.
Date: 17/03/2008 21:43:54

I think the problem happened after installing ISA SP3 (buit I not too sure if it is coincidence)

I can use RDP inbound and outbound, I can ping outbound - so i know the internet connection is working - it only seems to be for browsing the web.


It is ISA server V4.0.2167.887

I used the connected to the internet wizard in the server console.

There are two network cards in the server

Here is the routing table:
IPv4 Route Table
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 1e 0b 60 fd d4 ...... HP NC373i Multifunction Gigabit Server Adapt
0x10004 ...00 18 71 eb 2b 60 ...... HP NC110T PCIe Gigabit Server Adapter
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0   81.187.166.177   81.187.166.190      1
         10.0.1.0    255.255.255.0         10.0.1.2         10.0.1.2     10
         10.0.1.2  255.255.255.255        127.0.0.1        127.0.0.1     10
   10.255.255.255  255.255.255.255         10.0.1.2         10.0.1.2     10
   81.187.166.176  255.255.255.240   81.187.166.190   81.187.166.190     20
   81.187.166.190  255.255.255.255        127.0.0.1        127.0.0.1     20
   81.255.255.255  255.255.255.255   81.187.166.190   81.187.166.190     20
        127.0.0.0        255.0.0.0        127.0.0.1        127.0.0.1      1
        224.0.0.0        240.0.0.0         10.0.1.2         10.0.1.2     10
        224.0.0.0        240.0.0.0   81.187.166.190   81.187.166.190     20
  255.255.255.255  255.255.255.255         10.0.1.2         10.0.1.2      1
  255.255.255.255  255.255.255.255   81.187.166.190   81.187.166.190      1
Default Gateway:    81.187.166.177
===========================================================================
Persistent Routes:
  None

IPCONFIG /all

C:\Documents and Settings\Administrator>ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : server
   Primary Dns Suffix  . . . . . . . : oldham.local
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : Yes
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : oldham.local

Ethernet adapter LAN - 10.0.1.2:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : HP NC373i Multifunctio
apter
   Physical Address. . . . . . . . . : 00-1E-0B-60-FD-D4
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 10.0.1.2
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . :
   DNS Servers . . . . . . . . . . . : 10.0.1.2
   Primary WINS Server . . . . . . . : 10.0.1.2

Ethernet adapter WAN -:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : HP NC110T PCIe Gigabit
   Physical Address. . . . . . . . . : 00-18-71-EB-2B-60
   DHCP Enabled. . . . . . . . . . . : No
   IP Address. . . . . . . . . . . . : 81.187.166.190
   Subnet Mask . . . . . . . . . . . : 255.255.255.240
   Default Gateway . . . . . . . . . : 81.187.166.177
   DNS Servers . . . . . . . . . . . : 10.0.1.2
   NetBIOS over Tcpip. . . . . . . . : Disabled

and here is a screen capture of the local network in ISA.

Has anyone got any ideas?

Thanks
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Attachments:
 
ISA-config.png (7 KB) (File Type Details) 
ISA Config
ISA Config
 
[+][-]03.17.2008 at 03:26PM PDT, ID: 21146785

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[+][-]03.17.2008 at 03:35PM PDT, ID: 21146883

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[+][-]03.17.2008 at 03:45PM PDT, ID: 21146974

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[+][-]03.18.2008 at 03:01AM PDT, ID: 21149475

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[+][-]03.31.2008 at 12:33PM PDT, ID: 21248350

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About this solution

Zones: MS Internet Security & Accel, SBS Small Business Server
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Solution Provided By: cybis1
Participating Experts: 1
Solution Grade: A
 
 
 
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