Someday, someone will come to you saying that you have big big problems.
I’m not going to discuss the fact these are attacks that can be run against your network, or the chances they have to succeed (just google around and find yourself). Simply, having found myself in this situation, and having Windows Servers to secure, I read some information on Microsoft website (all is summarized here: http://support.microsoft.com/kb/245030/en-us) and found the way to modify some registry keys to enable or disable these protocols.
To make it short, I also wrote CipherControl, a .NET 2.0 application that can modify local or remote SCHANNEL settings on servers ranging from Windows 2000 to Windows Server 2003 (Vista and Server 2008 are under testing).
Well, you probably do not need lots of instructions to use CipherControl, by the way here are four simple steps:
This software is freeware. You can use it the way you want, as long as you don’t sell it. Needless to say, this software comes with no explicit or implicit warranty of any kind.
Download it from the bottom of this page.