This plugin enables use of Atlassian Crowd >= 2.1.x as an authentication source. Crowd is a commercial identity management and Single Sign-On (SSO) application.
To configure the plugin, you first need to create a new application in Crowd. http://confluence.atlassian.com/display/CROWD/Managing+Applications has more information on how to configure applications in Crowd.
Be sure to also allow connections to Crowd from the server Hudson runs on.
Next you need to configure a group that contains all users that are allowed to login into Hudson. http://confluence.atlassian.com/display/CROWD/Managing+Users%2C+Groups+and+Roles has more information how to manage users, groups and roles.
Once you have the application and group configured in Crowd, you can enable Crowd-based security in Hudson on the "Manage Hudson" page. Enter the URL of your Crowd server (will typically end with .../crowd) as well as the application name, password and group name you configured in Crowd.
Click on the "Check Connection" button to ensure that your connection credentials are valid.
This plugin has been tested with Hudson 2.1.x and Crowd 2.3.x, but was built using Hudson core 1.398 so it should work with Hudson >= 1.398.
Yes :-) That was the main reason I wrote this plugin.
Apart from SSO this plugin contains fixes for all open issues of the "Crowd Plugin". (If you look at the issue navigator, there are only five, but they are quite old; three of them even older than one year. Looking at the source code at GitHub (https://github.com/jenkinsci/crowd-plugin), there doesn't seem to be much activity trying to fix them).
A more technically answer is that this plugin code was written from scratch using a different API to connect to the Crowd server, i.e. the Crowd REST APIs. These are recommeded by Atlassian for long-term compatibility.
In contrary, the "Crowd Plugin" uses Crowd's Java integration libraries that have the disadvantage that one perhaps has to re-compile the source code when a new Crowd release is available and one has to update these libraries.
To restrict the number of your Crowd users that are allowed to login. I thought it's cool to have such a feature because for example Confluence and JIRA, other well known products from Atlassian, also work that way.
Fixed the following bugs: