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ISA Problem

Posted on 2010-11-20
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Last Modified: 2012-05-10
I am running ISA 2006 which is my gate way for my Exchange Server & Internet Access.

In the past few days I have noted that ISA seems to be disconnection the TCP Connection from my DNS Server (192.168.1.11) & thus causing Email to stop going out & in, also the Internet stops. Please see attached the error.

I only come to realize this problem takes pace when my clients start to complain that Email have not been received. I am forced to restart my ISA Server & I only hope the connection resumes so Emails and Internet Access can start, but after sometime the problem occurs again.

Please advise the solution to the problem.
Error-15113.doc
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Question by:Petersennik
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Accepted Solution

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jasbindra81 earned 63 total points
ID: 34179364
When you restart the ISA services it starts working again ,that means may be it is rate limiting your network Ips especially DNS server IP.  So what i would suggest you is go to Flood mitigation settings in ISA server and put an IP exception for DNS server .If it doesn't help ,check the logs on ISA server
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Author Comment

by:Petersennik
ID: 34179418
jasbindra81:

Please explain further how to do this "Flood mitigation settings in ISA server and put an IP exception for DNS server"
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Assisted Solution

by:0x6
0x6 earned 62 total points
ID: 34184227
The attached image should tell you how to add the exception. You would need to create a computer set and add your DNS server's IP in that set. Just click Add in the flood Mitigation Tab then New--Name the Computer set, for example 'DNS Server exception' Just like the screen shot has the "Allow Mail Server Exception" How to add IP Exception in ISA
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