January 29, 2002 10:29 PM

Addressing DoS Vulnerabilities

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Paula Sharick
Windows IT Pro
InstantDoc ID #23918
Last month, Microsoft published an article that documents five registry modifications you can use to reduce Windows 2000's TCP vulnerability to a variety of Denial of Service (DoS) attacks. These guidelines are appropriate for Win2K systems connected to a WAN or to the Internet and for sites that operate under strict security controls.

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Yes, the restart is required.

Anonymous User 1/4/2005 1:35:56 PM

For SynAttackprotect registry value, if I made it to 2 from 1 or 0 then system restart is required or Not ?

suhas4/25/2004 1:14:16 AM

Running Win2K Server, Service Pack 4. I conclude with the above correction in the registry hive. I presume it was a typo. Also, I had to add the extra keys such as SynAttackProtect. - Good Article.

Jagdish3/25/2004 3:24:16 PM

On my Windows 2000 Server SP2 systems, none of the registry values mentioned in this article (and in the Microsoft KBV Article Q315669 it references) were existing. I added them. For example, I added the value SynAttackProtect.

Mike1/30/2002 8:27:11 AM

The location of the hive is incorrect,
HKEY_LOCAL_MACHINE\\CurrentControlSet\\Services\\TCPIP\\Parameters

The correct location would be:
HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Services\\TCPIP\\Parameters

Nice article though.

Denton B 1/30/2002 6:54:32 AM

Use this with extreme caution on NT servers with IIS installed. The recommended settings kills IIS in a matter of seconds. I am looking for a set of recommended settings that will protect against DoS and still allow IIS to function.

Gilbert1/30/2002 5:56:22 AM

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