3Com SUPERSTACK 3CR16110-95, User Manual, Page: 61 / 214

Setting up the DHCP Server 61
The Firewall can allocate up to 255 static or dynamic IP addresses. 3Com
recommends you use a dedicated DHCP server if more addresses are
required.
To set up the DHCP server on the Firewall click Networ k, and then select
the DHCP Server tab. A window similar to that in Figure 26 displays.
Figure 26 DHCP Setup Window
Global Options Enable DHCP Server
Click this check box to enable or disable the DHCP server. This is disabled
by default. Leave the DHCP server disabled if there already is a DHCP
server on the LAN or if manual addressing is used on the LAN computers.
Lease Time
This is the amount of time that the IP address is leased, or given to the
client machine before the DHCP server attempts to renew that address. If
the client still requires the use of the IP address, the DHCP Server grants
the client the use of that IP address for the same amount of time. If the
client no longer requires the IP address, the address is freed and returned
to the pool of available addresses to be used again. The default value is
60 minutes.
Client Default Gateway
Enter the IP address of the WAN router used by LAN clients to access the
Internet. If NAT is being used this will be the LAN IP address of the
Firewall.
DUA1611-0AAA02.book Page 61 Thursday, August 2, 2001 4:01 PM