The OPC UA endpoints must be reachable within the network. Depending on the transport and configuration, this may include firewall rules, open ports, hostnames, IP addresses and certificates.

The PLCcom OPC UA SDK supports the common OPC UA communication options. It is important that client and server can reach the same endpoint and that the certificates used are trusted by both sides.

If direct connections are not possible or not desired, Reverse Connect can be used depending on the scenario.