mod_authn_alias - Apache HTTP Server

Apache HTTP Server Version 2.2

Apache > HTTP Server > Documentation > Version 2.2 > Modules

# Apache Module mod_authn_alias

Available Languages: en

Description: | Provides the ability to create extended authentication providers based on actual providers
Status: | Extension
Module Identifier: | authn_alias_module
Source File: | mod_authn_alias.c
Compatibility: | Available in Apache 2.1 and later

### Summary

This module allows extended authentication providers to be created within the configuration file and assigned an alias name. The alias providers can then be referenced through the directives `AuthBasicProvider` or `AuthDigestProvider` in the same way as a base authentication provider. Besides the ability to create and alias an extended provider, it also allows the same extended authentication provider to be reference by multiple locations.

### Directives

### Topics

- Examples

## Examples

This example checks for passwords in two different text files.

### Checking multiple text password files

`# Check here first
<AuthnProviderAlias file file1>
AuthUserFile /www/conf/passwords1
</AuthnProviderAlias>
# Then check here
<AuthnProviderAlias file file2>
AuthUserFile /www/conf/passwords2
</AuthnProviderAlias>
<Directory /var/web/pages/secure>
AuthBasicProvider file1 file2
AuthType Basic
AuthName "Protected Area"
Require valid-user
</Directory>
`

The example below creates two different ldap authentication provider aliases based on the ldap provider. This allows a single authenticated location to be serviced by multiple ldap hosts:

### Checking multiple LDAP servers

`LoadModule authn_alias_module modules/mod_authn_alias.so
<AuthnProviderAlias ldap ldap-alias1>
AuthLDAPBindDN cn=youruser,o=ctx
AuthLDAPBindPassword yourpassword
AuthLDAPURL ldap://ldap.host/o=ctx
</AuthnProviderAlias>
<AuthnProviderAlias ldap ldap-other-alias>
AuthLDAPBindDN cn=yourotheruser,o=dev
AuthLDAPBindPassword yourotherpassword
AuthLDAPURL ldap://other.ldap.host/o=dev?cn
</AuthnProviderAlias>
Alias /secure /webpages/secure
<Directory /webpages/secure>
Order deny,allow
Allow from all
AuthBasicProvider ldap-other-alias ldap-alias1
AuthType Basic
AuthName LDAP_Protected_Place
AuthzLDAPAuthoritative off
Require valid-user
</Directory>
`

## <AuthnProviderAlias> Directive

Description: | Enclose a group of directives that represent an extension of a base authentication provider and referenced by the specified alias
Syntax: | `<AuthnProviderAlias baseProvider Alias> ... </AuthnProviderAlias>`
Context: | server config
Status: | Extension
Module: | mod_authn_alias

`<AuthnProviderAlias>` and `</AuthnProviderAlias>` are used to enclose a group of authentication directives that can be referenced by the alias name using one of the directives `AuthBasicProvider` or `AuthDigestProvider`.

Available Languages: en