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Issue with ISA 2006 Automatic Detection

Posted on 2014-03-17
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Last Modified: 2014-03-23
Hello Experts ,

We have two sites connected with ISA site 2 site VPN with the same active directory

site 1 :
3 domain controllers - ISA server 2006
Site 2 :
2 domain controllers - ISA server 2006

Sometimes firewall client at site1 detect site 2 ISA server and vice verse and when we try to ping wpad it resolve the other site ISA server IP .

If we remove automatically detect proxy setting from internet explorer client successfully connect  to its local ISA server .

we need to know why clients sometimes detect the other site ISA server also how we can deny this ?

Thanks in advance for your support .
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Question by:Mohamed Hammad
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5 Comments
 
LVL 37

Expert Comment

by:bbao
ID: 39933800
are the clients of both sites using the same DNS server at one site?
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Author Comment

by:Mohamed Hammad
ID: 39933823
no they have their own DNS  on 2 domain controllers which replicated with the 3 domin controllers DNS at the other site
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Accepted Solution

by:
Mohamed Hammad earned 0 total points
ID: 39938974
I have solved this issue but force client to use dhcp to discover wpad file
 navigate to :

HKEY_Current_User\Software\Microsoft\Windows\CurrentVersion\Internet Settings
Then add the following value:
DWORD: AutoProxyDetectType Set the value to 1 to force DHCP only.

Now we need to reload wpad  for Internet Explorer to detect changes by remove “automatically detect setting” and “use automatic configuration script” from connection tab at Internet options then close Internet Explorer and open it again then enable them again .

Also at cmd  type ipconfig/flushdns to clear DNS cache
0
 

Author Closing Comment

by:Mohamed Hammad
ID: 39948422
I have solved my issue by this way
0
 
LVL 37

Expert Comment

by:bbao
ID: 39948490
sorry for replying late and good to know the problem was solved.
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