Web User Authentication:
Example 1, by Domain Name.

Computing & Information Services Department.
author: cwis.admin@unh.edu

Here's the recipe:


Create the .htaccess control file using 
your editor of choice, e.g., pico (Unix),
Simpletext (Mac), or Notepad (Windows).
Remember, Unix files that begin with a dot 
are special and do not show up in normal listings 
but require the "a" switch, as in:
     % ls -al
OK, put the following in the 5-line .htaccess 
file.  Each line begins in column 1. Exact case
and spacing matter: 

     order deny,allow
     deny from all
     allow from 132.177.
     allow from 158.65.
     allow from 158.136.

1st line indicates that deny directives come first, 
    followed by any allow directives.
2nd line indicates the default is to deny everyone.
3rd line makes an exception to allow access for any 
    browser within the unh.edu domain represented
    by the first two bytes of the domain address space.
    Note the use of the trailing period to indicate an 
    entire domain.
4th line makes an exception to allow access for any
    browser within the keene.edu domain represented
    by the first two bytes of the domain address space.
    Note the use of the trailing period to indicate an 
    entire domain.          
5th line makes an exception to allow access for any
    browser within the plymouth.edu domain represented
    by the first two bytes of the domain address space.
    Note the use of the trailing period to indicate an 
    entire domain.          

    If you want to also allow access from the block of
    addresses reserved for Ultranet's UNH customers who
    use the Durham access point (Ultranet issues a 
    password to such customers), then you need to
    include these statements as well:

        allow from 207.180.187.
        allow from 207.180.186.
        allow from 207.180.184.

    That would still exclude from UNH who was using another
    Internet Service Provider, such as AOL.

Copy this file into the directory to be protected
and give it world-read access:
     % chmode go+r .htaccess
     % ls -al
Test it to make sure it works.  This may mean asking
someone at another site to try it.

We also have a copy of this file without
any HTML markup that you can 
display and save to disk.