WAS v8.5 > Administer applications and their environment > Welcome to administering Messaging resources > Manage messaging with the default messaging provider > Interoperate with a WebSphere MQ network > Use WebSphere MQ links to connect a bus to a WebSphere MQ network > Administer an existing WebSphere MQ link

Modify security for a WebSphere MQ link

Securing access between a service integration bus and a WebSphere MQ Queue Manager. When you create a new WebSphere MQ link, we can use the foreign bus connection wizard to enable security:

• If the WebSphere MQ queue manager requires a secure connection, we can set the WebSphere MQ receiver channel to accept only connections that have secure sockets layer (SSL) based encryption.

• If the local bus is secure, we can set the service integration bus inbound user ID to replace the user ID in messages from the WebSphere MQ queue manager, so these messages are authorized to access their destinations.

  Inbound user ID

  If an inbound user ID is set, then all incoming messages will appear to have originated from that user ID. If the bus is security enabled then messages will appear authenticated as this user ID and have access to any resources the user ID has access to.

  If an inbound user ID is not set, then messages will have the same user ID as in the WebSphere MQ message descriptor (MQMD) header of the WebSphere MQ message. These users will not be authenticated and therefore only have access to resources that require no authentication.

  Outbound user ID

  If an outbound user ID is set, then all outgoing messages will appear to have originated from that user ID (using the userid field of the MQMD)

  If an outbound user ID is not set, then messages will have the same user ID as in the original service integration bus message.

Use this task to secure the local and foreign bus that are part of a WebSphere MQ links configuration, and to secure an existing WebSphere MQ link that was not secured when it was first created.

For more general information about service integration bus security, see Secure service integration.

1. Enable security on the service integration bus and the foreign bus representing the WebSphere MQ network. See Secure buses.
2. Secure the link between the buses - see Secure connections to a WebSphere MQ network.
3. Grant access to the local bus for users who will be sending messages to the foreign bus - see Secure buses.
4. Grant access to the foreign bus for users who will be sending messages to it - see Administer foreign bus roles.

5. Optional: Give users access to foreign or alias destinations that will forward messages to a foreign bus - see Administer destination roles.

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