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14.8.2 - Virtual hosts 431
Protocol
Make your choice. The connection between SX-GATE and the backend server
may be encrypted or not.
Server
Please enter the IP or DNS name of the backend.
Port
If you don't enter a specific port, the backend will be contacted on the standard
ports (80 for HTTP, 443 for HTTPS).
Factor
When load balancing (multiple entries with the same URL path), this value allows
you to even out performance differences of the backends.
Comment
For your documentation.
Redirect home page to
The reverse proxy can reply to requests for the home page ("/") with an HTTP redirect.
So users will be able to access a path based backend server without heaving to type
or even know the actual path. Enter e.g. "https://owa.example.com/owa" to redirect
requests for "https://owa.example.com" to the Outlook Web App backend.
This setting does not have any effect if a userdefined backend
server for path "/*" is configured.
14.8.2-D Load balancing
Configure multiple backend server for the same URL path on tab "Backend servers"
and SX-GATE will act as a load balancer for the corresponding requests.
Basically a load balancer distributes requests to several backends, serving the same
contents and applications. SX-GATE's reverse proxy chooses a random backend,
taking into account the weighting factor you can assign to each backend. An optional
session detection will make sure that subsequent requests of the same client stick to
the same backend. A backend which does not respond will no longer receive requests.
The reverse proxy will check every 30 seconds if it is alive again.
Session tracking
Some applications require that subsequent requests of the same client are processed
by the same backend server. Usually the backend itself uses some sort of session
tracking to accomplish this. In the best case the reverse proxy and the backend use
the same method to identify a session.