Web Services Addressing: firewalls and intermediary nodes

Using the Web Services Addressing (WS-Addressing) support in this product, you can create endpoint references that can be distributed across firewalls and intermediary nodes.

Using the WS-Addressing support, you can automatically generate endpoint references that represent endpoints on the node on which the references are generated. These endpoint references contain appropriate address information, based on the URL configured for the endpoint and any valid proxy configuration for the server that hosts the endpoint. Messages targeted at the endpoint reference from the client are routed to the endpoint through the appropriate intermediary node or nodes, as described in the following topology scenarios.

Direct connection

In this topology, there is no intermediary node. The client communicates directly with the server that hosts the target endpoint. In this topology, the WS-Addressing APIs automatically generate the appropriate endpoint reference address, based on the URL configured for the web service module. This scenario is illustrated in the following diagram.
The web service client sends messages directly to the WebSphere Application Server that hosts the target endpoint.

Endpoint references created by using the standard JAX-WS API are not workload managed.

HTTP server, such as IBM HTTP Server

In this topology, the IBM WS-Addressing API automatically generates the appropriate endpoint reference address based on the URL prefix of the HTTP server that is configured for the target web service module. You must provide HTTP endpoint URL information, that is, configure the HTTP URL prefix for each deployment of each application. The client communicates with the HTTP server, which then routes the client requests to a specific server based on the HTTP server configuration.
The web service client communicates, through a firewall, with the HTTP server in the demilitarized zone. The configuration of the HTTP server determines where the message is sent in WebSphere Application Server.



Related concepts
Web Services Addressing APIs
Web services transactions, high availability, firewalls and intermediary nodes
Related tasks
Configuring virtual hosts
Creating endpoint references by using the IBM proprietary Web Services Addressing API
Related reference
Provide HTTP endpoint URL information
Concept topic Concept topic    

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Last updatedLast updated: Sep 19, 2011 6:15:55 PM CDT
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