3.1.3 Initialization
The CER client MUST check for the existence of a destination server. If a destination server is not set or if it is not valid, the CER client MUST stop processing.
The CER client MUST also check whether the destination server port is set; if it is set, then the CER client MUST use the destination server port for any communication with the CER server. If the destination server port is not set, it defaults to port 1273.