This document describes how to configure Tomcat to support container managed security, by connecting to an existing 'database' of usernames, passwords, and user roles. You only need to care about this if you are using a web application that includes one or more elements, and a element defining how users are required to authenticate themselves. If you are not utilizing these features, you can safely skip this document. For fundamental background information about container managed security, see the, Section 12. It is also possible to configure an environment where yet another server will act as the fail-over load-balancer if the first one fails, but this is outside the scope of this guide. To set up our load-balancer, we use the Apache web-server and its modules mod_proxy, mod_proxy_ajp and mod_proxy_balancer. For this setup, we need four nodes (two Apache nodes and two load balancer nodes) and five IP addresses: one for each node and one virtual IP address that will be shared by the load balancer nodes and used for incoming HTTP requests. Terminating SSL at the load balancer is not supported for any use case. It is recommended to use a load balancer that supports SNI. In the event it does not, using the 0.0.0.0 fallback binding on your AD FS / Web Application Proxy server should provide a workaround. Hitman absolution review. Configuring Apache Web Server for load balancing in Windows environment. Log on to load-balancing server as a user with administrative privileges. Open a Command Prompt window by using the Run as Administrator option. Go to the Apache_Home conf directory. Open the httpd.conf file. Save and close the file. For information about utilizing the Single Sign On feature of Tomcat (allowing a user to authenticate themselves once across the entire set of web applications associated with a virtual host), see. A Realm is a 'database' of usernames and passwords that identify valid users of a web application (or set of web applications), plus an enumeration of the list of roles associated with each valid user. Windows Network Load BalancerYou can think of roles as similar to groups in Unix-like operating systems, because access to specific web application resources is granted to all users possessing a particular role (rather than enumerating the list of associated usernames). A particular user can have any number of roles associated with their username. Although the Servlet Specification describes a portable mechanism for applications to declare their security requirements (in the web.xml deployment descriptor), there is no portable API defining the interface between a servlet container and the associated user and role information. In many cases, however, it is desirable to 'connect' a servlet container to some existing authentication database or mechanism that already exists in the production environment. Therefore, Tomcat defines a Java interface ( org.apache.catalina.Realm) that can be implemented by 'plug in' components to establish this connection. Six standard plug-ins are provided, supporting connections to various sources of authentication information: • - Accesses authentication information stored in a relational database, accessed via a JDBC driver. • - Accesses authentication information stored in a relational database, accessed via a named JNDI JDBC DataSource. • - Accesses authentication information stored in an LDAP based directory server, accessed via a JNDI provider.
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