Hi,

The opc.tcp protocol works like any other tcp (https://en.wikipedia.org/wiki/Transmission_Control_Protocol) protocol network-wise, there isn’t anything special about that.

Generally it should be noted that these kinds of questions fall somewhat under basic networking know-how that you should just already know (or be willing to learn by yourself) and thus outside scope of this forum. We do offer professional services (e.g. consulting): https://www.prosysopc.com/services/.

But that being said, you can study and try these, as a rule of thumb the machine connecting must see the other machine it is to connect.

– Your IP range is https://en.wikipedia.org/wiki/Private_network, thus connections from https://en.wikipedia.org/wiki/Wide_area_network does not work obiviously unless your (most likely router’s) https://en.wikipedia.org/wiki/Network_address_translation forward it properly
– Also e.g. Windows 10 might https://en.wikipedia.org/wiki/Domain_Name_System the hostname to https://en.wikipedia.org/wiki/IPv6 (usually only a https://en.wikipedia.org/wiki/Localhost problem if a server does not bind to IPv6 localhost and you use the hostname to connect)
– See if you can https://en.wikipedia.org/wiki/Ping_(networking_utility) the other machine from the other, but it is not necessary nor it might give direct indication that connecting with UA would work