README.TXT

Microsoft Internet Information Server 
AuthFilt - A Filter for Advanced Authentication 
 
 
AuthFilt demonstrates how to write an authentication filter based on an 
external datasource. Authentication is the process of accepting or 
denying a request from a client, so AuthFilt will be notified each time 
an authentication request comes in. This sample uses a file 
(c:\inetsrv\userdb.txt) to keep track of authorized users, but you might 
modify this sample to access a database which holds user info.  The file 
c:\inetsrv\userdb.txt does not exist.  Please look at Db.c to see how to 
construct such a file and change the location of the file if you so desire. 
 
For each authentication request, AuthFilt first looks in a cache of 
recently authenticated users, and when that fails, AuthFilt looks in the 
userdb.txt file. This shows an efficient way to authorize connections: 
a cache allows the filter to quickly authenticate users, and because 
each request comes in through the filter, speed is critical. 
 
Steps to build the sample: 
 
1. Type "nmake" at the command line in the AuthFilt directory.  If you  
   encounter problems with missing header files, make sure your INCLUDE 
   variable points to the Win32 SDK include directory, the VC++ include 
   directory, and the IIS 4.0 include directory.  Also, make sure LIB  
   variable points to the Win32 SDK lib directory. 
 
OR 
 
Load the project file (Authfilt.dsp) into VC++ and build the project  
by running the build AuthFilt.dll command. 
 
2. Run the Internet Service Manager and add the AuthFilt.dll with a fully 
   qualified path either as a global filter or a Website filter.