Global security and server security
The term global security refers to the security configuration that is effective for the entire security domain. A security domain consists of all the servers configured with the same user registry realm name. On the z/OS platform, the term global security refers to the security configuration that is effective for the WAS cell.
In some cases, the realm can be the machine name of a Local OS user registry. In this case, all application servers must reside on the same physical machine. In other cases, the realm can be the machine name of a Lightweight Directory Access Protocol (LDAP) user registry. Because LDAP is a distributed user registry, this allows for a multiple node configuration in a Network Deployment environment. The basic requirement for a security domain is that the access ID returned by the registry from one server within the security domain is the same access ID that is returned from the registry on any other server within the same security domain. The access ID is the unique identification of a user and is used during authorization to determine if access is permitted to the resource.
Configuration of global security for a security domain consists of configuring the common user registry, the authentication mechanism, and other security information that defines the behavior of a security domain. The other security information that is configured includes the following components:
- Java 2 Security Manager
- Java Authentication and Authorization Service (JAAS)
- Java 2 Connector authentication data entries
- Common Secure Interoperability V2 (CSIv2) / SAS authentication protocol (Remote Method Invocation over the Internet Inter-ORB Protocol (RMI/IIOP) security)
- Other miscellaneous attributes.
You can override some portions of the configuration at the server level.
In a Network Deployment environment, where multiple nodes and multiple servers within a node are possible, one can configure certain attributes at a server level. The attributes that are configurable at a server level include security enablement for the server, Java 2 Security Manager enablement, and CSIv2/SAS (or CSIv2 / z/SAS on the z/OS platform) authentication protocol (RMI/IIOP security). You can disable security on individual application servers while global security is enabled, however, one cannot enable security on an individual application server while global security is disabled.
While application server security is disabled for user requests, administrative and naming security is still enabled for that application server so that the administrative and naming infrastructure remains secure. If cell security is enabled, but security for individual servers is disabled, J2EE applications are not authenticated or authorized. However, naming and administrative security is still enforced. Consequently, because Naming Services can be called from user applications you need to grant Everyone access to the naming functions that are required so that these functions accept unauthenticated requests. User code does not directly access administrative security except through the supported scripting tools.
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