WCF Port Usage

RPC communications can be used to transmit Global data. Global uses TCP port 135 and a dynamic range of ports above 1024 to communicate from one location to another if RPC is used. (that means, through the Global daemons running at each location).

The dynamic range of ports required to be open (that means, 1024 and above) poses a security risk. In order to reduce this, we can force the operating system’s RPC communications to use only a specified range of ports. This drastically reduces the risk of intrusion from third parties.

When WCF is enabled as the security provider the user has full control over the ports used for network communication. Port usage is specified inside configuration files described in the Global WCF Configuration Guide.

The ports specified in the configuration files must be opened for bi-directional traffic on the Firewall.

Additionally firewall rules can be specified to limit access to ports used by a specific program. Global has a unique identifier (UUID) which can be used when defining a firewall rule. For further details contact AVEVA Support directly.