Device-to-Platform Communications

Depending on your environment, devices typically connect to a Relay Server deployed to the DMZ (recommended). Alternatively, you can use a third reverse proxy or load balancers. However, in most Unwired Platform deployments, a Relay Server is the first line of defense to the platform by acting as a proxy for the device, and facilitating interactions with Unwired Servers installed on the corporate LAN.

For Relay Server connections, the traffic content depends on the payload protocol of the application:
- Messaging communication encrypts the entire communication stream with a proprietary protocol.
- Replication communication uses both HTTP or HTTPS protocol
For Relay Server, configure the Web server host (IIS or Apache) to use a secure port, and use Sybase Control Center to configure Relay Server to use secure protocols, ports, and certificates in Sybase Control Center.

On the client (in the case of mutual authentication), install certificates, and configure profiles to connect to Relay Server.
Reverse proxies or load balancers require you to open firewall holes from the DMZ to Unwired Platform, but the same protocols described for messaging and replication still apply.