Real Time Triplex Stand Alone DVR53CHAP 3. SETUP MENUTo check and change Mac. Address, Network Server IP and Port number ofyour DVR, press CH6 button in network setup mode.The main reason of hidden menu of Mac. Address, Network Server IP and Portnumber is to prevent accidental changes by the user.NoteNote1. we would like to recommend you to check your local Firewall or personalnetwork security programs. Sometimes they block certain ports for networksecurity purpose.2. If you don’t have right information about network configuration, please contactyour network administrator.