From wiki: " Your zynthian box uses the link-local name "zynthian.local" and can be accessed with sftp and scp "
"If the link-local address (zynthian.local) is not found, test if the link-local feature is enabled in your system. Sometimes is disabled and local names are not recognized. Also, you can use directly the zynthian IP, using the "Network Info" utility in the Zynthian's Admin menu. "
Mine is disabled and BACK switch doesn't work to access to ADMIN menu...