But I got some progress: 1. Image leads to subdomain: http://dev.missilesys.com/ 2. It generates p12 certificate for login to admin-panel. You should enter username/password, submit the form and click download. (It there is no download button just try something like this: refresh the page, change method from POST to GET, enter credentials and press Submit, after that press submit again it'll appear) 3. Add certificate to KeyChain (on macOS) and go to missilesys.com. 4. You're got into admin-panel, but you have no permissions to shutdown it. You need to be an administrator. 5. You should get .p12 certificate for administrator, but you can't because "User alreay exists!". This's place where I'm stuck.

It would be great if you have an idea how to handle with it :)