It may be necessary to
manually update your internal networking devices so they route information to the
replacement server.
Authentication
The current Windows standard for authentication is Kerberos, which itself is not a
Windows standard. Kerberos is an industry-defined authentication method. The
authentication method used previously by Windows was NT LAN Manager (NTLM).
This is essentially the same authentication method that was used when DOS PCs were
networked.
Kerberos hands out a ???ticket??? when a user authenticates, and this ticket only contains
the information that the user is who he says he is. NTLM, on the other hand,
provides a token that has not only the authentication of the user, but also a list of the
resources to which the user has access. (Anyone remember being told to log off and back
on to the network after a permission change?)
CHAPTER 10 n HARDWARE CONSIDERATIONS 263
Problems arise when both authentication schemes are active on the network. SQL
Server tries to authenticate first with Kerberos and then move on to NTLM if Kerberos
fails. At times, it seems like the order gets reversed.
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