For safety reasons WTware server works only via secure HTTPS protocol with authorization.
HTTPS encodes transmitted data and therefore it's safer than unsecure HTTP protocol. Without certificate, issued by certificate authority for your server's name, browser will give an error while connecting to WTware server by HTTPS. Select to continue to this web-site and add security exception in browser, then everything will work.
Password for admin user was specified duting WTware installation. You may change this password in WTware graphic configurator on server.
Switch to HTTPS.
Accept browser security exception.
Default user : admin