ZCS Administrator Guide 8.0

Open Source Edition

Configure ZCS HTTP Proxy

Zimbra Proxy can reverse proxy HTTP requests to the right back-end server.

For example, users can use a web browser to connect to the proxy server at http://mail.example.com. The connection from users whose mailboxes live on mbs1. example.com is proxied to mbs1.example.com by the proxy running on the mail.example.com server,. REST and CalDAV clients, Zimbra Connector for Outlook, Zimbra Connector for BES, and Zimbra Mobile Sync devices are also supported by the proxy.

Note:

When ZCB is configured in ZCS, the proxy configuration must be changed from the directions here. See the Zimbra wiki article Installing Blackberry Enterprise Server in a Zimbra Proxy Envornment.

HTTP reverse proxy routes requests as follows:

If the requesting URL can be examined to determine the user name, then the request is routed to the backend mailbox server of the user in the URL. REST, Ca lDAV, and Zimbra Mobile Sync are supported through this mechanism.

If the request has an auth token cookie (ZM_AUTH_TOKEN), the request is routed to the backend mailbox server of the authenticated user.

If the above methods do not work, the IP hash method is used to load balance the requests across the backend mailbox servers which are able to handle the request or do any necessary internal proxying.