76Router RouterPCRecorderIP address: 192.168.1.1Subnet mask: 255.255.255.0IP address: 192.168.1.100Subnet mask: 255.255.255.0Default gateway: 192.168.1.1* Stands for Wide Area NetworkWAN* IP address: 192.168.0.1Subnet mask: 255.255.255.0IP address: 192.168.0.250Subnet mask: 255.255.255.0Default gateway: 192.168.0.1Switching hubFirewallPCRouter RouterRecorderIP address: 192.168.1.1Subnet mask: 255.255.255.0IP address: 192.168.1.100Subnet mask: 255.255.255.0Default gateway: 192.168.1.1* Stands for Wide Area NetworkWAN*IP address: 192.168.0.1Subnet mask: 255.255.255.0IP address: 192.168.0.250Subnet mask: 255.255.255.0Default gateway: 192.168.0.1Network security of the recorderThe security function of the recorderq Access restriction by the user authentication and the host authenticationIt is possible to restrict users to access the recorder by selecting "On" for "User authentication/Host authen-tication". (☞ Installation Guide)w Access restriction by changing the HTTP port numberBy changing the HTTP port number, it is possible to prevent illegal access such as a port scanning, etc.(☞ Installation Guide)To enhance the network securityIt is possible to enhance the network security by dividing the subnet using a router to authenticate users twice(by the recorder and by the router). When connecting the recorder to an unsecured network, secure the networkconnection by installing a VPN (Virtual Private Network) device, etc. between the recorder and the host PC.Important:• The settings for the network security vary depending on the network to which the recorder is to be con-nected such as an intranet or Internet service provider. Refer to a network administrator for further infor-mation about the network security.[Connection example]By using a firewall, etc., it is possible to use packet filtering and protocol filtering to enhance the network secu-rity.[Connection example]
