11Equipped security functionsq Access restrictions by the host authentication and the user authenticationIt is possible to restrict users from accessing this unit by setting the host authentication and/or the user authenti-cation to on. ( page 65)w Access restrictions by changing the HTTP portIt is possible to prevent illegal access such as port scanning, etc. by changing the HTTP port number.( page 55)For enhanced securityDivide the subnet using a router to enhance the network security by double authentications of IP addresses usingthis unit and a router. When required to connect this unit with a network without enhanced security, connect the unitafter the network security is enhanced, such as by installing a VPN (Virtual Private Network) device, etc.Important:The settings of the unit will be different depending on the settings of the LAN or the Internet service provider towhich the unit is to be connected. Refer to an administrator of each network for further information about therespective network.[Connection example]Installing a firewall to use the packet filtering and the protocol filtering functions can better enhance the networksecurity.[Connection example]About the Network Security of This UnitWAN*Router RouterIP address: 192.168.1.100Subnet mask: 255.255.255.0Default gateway: 192.168.1.1 IP address: 192.168.0.250Subnet mask: 255.255.255.0Default gateway: 192.168.0.1IP address: 192.168.0.1Subnet mask: 255.255.255.0IBM PC/AT compatibleIP address: 192.168.1.1Subnet mask: 255.255.255.0This unit* Wide Area NetworkONOFFPOWERALARMALARM/CONTROLSIGNAL GND10/100BASE-TAC INWAN*Switching hubFirewallRouter RouterIP address: 192.168.1.100Subnet mask: 255.255.255.0Default gateway: 192.168.1.1IP address: 192.168.0.1Subnet mask: 255.255.255.0IP address: 192.168.1.1Subnet mask: 255.255.255.0IP address: 192.168.0.250Subnet mask: 255.255.255.0Default gateway: 192.168.0.1IBM PC/AT compatible* Wide Area NetworkThis unitONOFFPOWERALARMALARM/CONTROLSIGNAL GND10/100BASE-TAC IN