ZyXEL ZyWALL USG 50 User Manual - Page 263
Add Static DHCP, Pool Size, Subnet Mask, IP Pool Start Address, Custom Defined, From ISP, ZyWALL,
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Chapter 11 Interfaces Table 68 Configuration > Network > Interface > Bridge > Edit (continued) LABEL DESCRIPTION IP Pool Start Address Enter the IP address from which the ZyWALL begins allocating IP addresses. If you want to assign a static IP address to a specific computer, click Add Static DHCP. Pool Size If this field is blank, the Pool Size must also be blank. In this case, the ZyWALL can assign every IP address allowed by the interface's IP address and subnet mask, except for the first address (network address), last address (broadcast address) and the interface's IP address. Enter the number of IP addresses to allocate. This number must be at least one and is limited by the interface's Subnet Mask. For example, if the Subnet Mask is 255.255.255.0 and IP Pool Start Address is 10.10.10.10, the ZyWALL can allocate 10.10.10.10 to 10.10.10.254, or 245 IP addresses. First DNS Server Second DNS Server Third DNS Server If this field is blank, the IP Pool Start Address must also be blank. In this case, the ZyWALL can assign every IP address allowed by the interface's IP address and subnet mask, except for the first address (network address), last address (broadcast address) and the interface's IP address. Specify the IP addresses up to three DNS servers for the DHCP clients to use. Use one of the following ways to specify these IP addresses. Custom Defined - enter a static IP address. From ISP - select the DNS server that another interface received from its DHCP server. ZyWALL - the DHCP clients use the IP address of this interface and the ZyWALL works as a DNS relay. First WINS Server, Second WINS Server Type the IP address of the WINS (Windows Internet Naming Service) server that you want to send to the DHCP clients. The WINS server keeps a mapping table of the computer names on your network and the IP addresses that they are currently using. Lease time Specify how long each computer can use the information (especially the IP address) before it has to request the information again. Choices are: infinite - select this if IP addresses never expire days, hours, and minutes - select this to enter how long IP addresses are valid. Enable IP/MAC Binding Select this option to have this interface enforce links between specific IP addresses and specific MAC addresses. This stops anyone else from manually using a bound IP address on another device connected to this interface. Use this to make use only the intended users get to use specific IP addresses. Enable Logs for IP/MAC Binding Violation Select this option to have the ZyWALL generate a log if a device connected to this interface attempts to use an IP address that is bound to another device's MAC address. Static DHCP Table Configure a list of static IP addresses the ZyWALL assigns to computers connected to the interface. Otherwise, the ZyWALL assigns an IP address dynamically using the interface's IP Pool Start Address and Pool Size. ZyWALL USG 50 User's Guide 263