How can I implement single sign-on (SSO) using Microsoft AD for an internal PHP app?

Question

I\'m vaguely aware that on a computer joined to a domain IE can be asked to send some extra headers that I could use to automatically sign on to an application. I\'ve got ap

Answer 1

All you need is the mod_auth_sspi Apache module.

Sample configuration:

AuthType SSPI
SSPIAuth On
SSPIAuthoritative On
SSPIDomain mydomain

# Set this if you want to allow access with clients that do not support NTLM, or via proxy from outside. Don't forget to require SSL in this case!
SSPIOfferBasic On

# Set this if you have only one domain and don't want the MYDOMAIN\ prefix on each user name
SSPIOmitDomain On

# AD user names are case-insensitive, so use this for normalization if your application's user names are case-sensitive
SSPIUsernameCase Lower
AuthName "Some text to prompt for domain credentials"
Require valid-user

And don't forget that you can also use Firefox for transparent SSO in a Windows domain: Simply go to about:config, search for network.automatic-ntlm-auth.trusted-uris, and enter the host name or FQDN of your internal application (like myserver or myserver.corp.domain.com). You can have more than one entry, it's a comma-separated list.