401 Unauthorized You are not authorized to view this page. If you have not changed any configuration files, please examine the file conf/tomcat-users.xml in your installation. That file must contain the credentials to let you use this webapp. For example, to add the admin-gui role to a user named tomcat with a password of s3cret, add the following to the config file listed above. <role rolename="admin-gui"/> <user username="tomcat" password="s3cret" roles="admin-gui"/> Note that for Tomcat 7 onwards, the roles required to use the host manager application were changed from the single admin role to the following two roles. You will need to assign the role(s) required for the functionality you wish to access. admin-gui - allows access to the HTML GUI admin-script - allows access to the text interface The HTML interface is protected against CSRF but the text interface is not. To maintain the CSRF protection: Users with the admin-gui role should not be granted the admin-script role. If the text interface is accessed through a browser (e.g. for testing since this interface is intended for tools not humans) then the browser must be closed afterwards to terminate the session.