2. The specific connection principle is that the extranet passes through the firewall and then accesses the intranet. First, you have to have a firewall, license. In fact, you have to have administrator authorization. The home computer added to the intranet inside the domain. This system is actually the same as a bank. The energy industry is one thing it's all about security. That's why there are all these restrictions. So you guys in theory you can not install a hospital medical system on a personal laptop.