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Update documentation covering external authentication 

refs #8274
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Johannes Meyer 2015-01-28 17:52:17 +01:00
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# Externel Authentication
# External Authentication
It is possible to use the authentication mechanism of the webserver,
instead of using the internal authentication-manager to
authenticate users. This might be useful if you only have very few users, and
user management over *.htaccess* is sufficient, or if you must use some other
authentication mechanism that is only available through your webserver.
It is possible to utilize the authentication mechanism of the webserver instead
of the internal authentication of Icinga Web 2 to authenticate users. This might
be useful if you only have very few users and user management over **.htaccess**
is not sufficient or if you are required to use some other authentication
mechanism that is only available by utilizing the webserver.
When external authentication is used, Icingaweb will entrust the
complete authentication process to the external authentication provider (the webserver):
The provider should take care of authenticating the user and declining
all requests with invalid or missing credentials. When the authentication
was succesful, it should provide the authenticated users name to its php-module
and Icingaweb will assume that the user is authorized to access the page.
Because of this it is very important that the webservers authentication is
configured correctly, as wrong configuration could lead to unauthorized
access to the site, or a broken login-process.
Icinga Web 2 will entrust the complete authentication process to the
authentication provider of the webserver, if external authentication is used.
So it is very important that the webserver's authentication is configured
correctly as wrong configuration might lead to unauthorized access or a
malfunction in the login-process.
## Using External Authentication
## Use External Authentication
External authentication in Icinga Web 2 requires the following preparations:
Using external authentication in Icingaweb requires two steps to work:
1. The external authentication must be set up properly to correctly
authenticate users
2. Icinga Web 2 must be configured to use external authentication
1. The external authentication must be set up correctly to always
authenticate the users.
2. Icingaweb must be configured to use the external authentication.
### Preparing the External Authentication Provider
This step depends heavily on the used webserver and authentication mechanism you
want to use. It is not possible to cover all possibillities and you should
probably read the documentation for your webserver to get detailed instructions
on how to set up authentication properly.
### Prepare the External Authentication Provider
This step depends heavily on the used webserver and authentication
mechanism you want to use. It is not possible to cover all possibillities
and you should probably read the documentation for your webserver for
detailed instructions on how to set up authentication properly.
In general, you need to make sure that:
In general you need to make sure that:
- All routes require authentication
- Only permitted users are allowed to authenticate
#### Example Configuration for Apache and HTTPDigestAuthentication
The following example will show how to enable external authentication in Apache using
*HTTP Digest Authentication*.
The following example will show how to enable external authentication in Apache
using *HTTP Digest Authentication*.
##### Create users
##### Creating users
To create users for a digest authentication we can use the tool *htdigest*.
We choose *.icingawebdigest* as a name for the created file, containing
the user credentials.
To create users for digest authentication you can use the tool *htdigest*. In
this example **.icingawebdigest** is the name of the file containing the user
credentials.
This command will create a new file with the user *jdoe*. *htdigest*
will prompt you for your password, after it has been executed. If you
want to add more users to the file you need to ommit the *-c* parameter
in all further commands to avoInid the file to be overwritten.
This command creates a new file with the user *jdoe*. *htdigest* will prompt
you for a password. If you want to add more users to the file you need to omit
the *-c* parameter in all following commands to not to overwrite the file.
````
sudo htdigest -c /etc/icingaweb2/.icingawebdigest "Icinga Web 2" jdoe
````
sudo htdigest -c /etc/httpd/conf.d/.icingawebdigest "Icingaweb 2" jdoe
##### Configuring the Webserver
The webserver should require authentication for all public Icinga Web 2 files.
##### Set up authentication
The webserver should require authentication for all public icingaweb files.
<Directory "/var/www/html/icingaweb">
````
<Directory "/usr/share/icingaweb2/public">
AuthType digest
AuthName "Icingaweb 2"
AuthName "Icinga Web 2"
AuthDigestProvider file
AuthUserFile /etc/httpd/conf.d/.icingawebdigest
AuthUserFile /etc/icingaweb2/.icingawebdigest
Require valid-user
</Directory>
````
### Preparing Icinga Web 2
### Prepare Icingaweb
Once external authentication is set up correctly you need to configure Icinga
Web 2. In case you already completed the setup wizard it is likely that you are
now finished.
When the external authentication is set up correctly, we need
to configure IcingaWeb to use it as an authentication source. The
configuration key *authenticationMode* in the section *global* defines
if the authentication should be handled internally or externally. Since
we want to delegate the authentication to the Webserver we choose
"external" as the new value:
To get Icinga Web 2 to use external authentication the file
**config/authentication.ini** is required. Just add the following section
called "autologin", or any name of your choice, and save your changes:
````
[autologin]
backend = external
````
[global]
; ...
authenticationMode = "external"
; ...
Congratulations! You are now logged in when visiting Icinga Web 2.