Networking
Configuring DMZ
Cisco ISA500 Series Integrated Security Appliances Administration Guide 145
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•Lease Time: Enter the maximum connection time that a dynamic IP address
is “leased” to a network user. When the time elapses, the user will be
automatically renewed the dynamic IP address.
•DNS 1: Enter the IP address of the primary DNS server.
•DNS 2: Optionally, enter the IP address of the secondary DNS server.
•WINS 1: Optionally, enter the IP address of the primary WINS server.
•WINS 2: Optionally, enter the IP address of the secondary WINS server.
•Domain Name: Optionally, enter the domain name for the DMZ.
•Default Gateway: Enter the IP address of default gateway.
•Option 66: Provides provisioning server address information to hosts
reque stin g thi s opt ion. Only supp orts the I P add ress or ho st nam e of a sing le
TFTP server. Enter the IP address of the single TFTP server for the DMZ.
•Option 67: Provides a configuration/bootstrap file name to the hosts
requesting this option. This is used in conjunction with the option 66 to allow
the client to form an appropriate TFTP request for the file. Enter the
configuration/bootstrap file name on the specified TFTP server.
•Option 150: Supports a list of TFTP servers (2 TFTP servers). Enter the IP
addresses of TFTP servers. Separate multiple entries with commas (,).
STEP 5 In the IPv6 Set ting tab, specify IPv6 addressing for the DMZ if you enable the
IPv4/IPv6 mode.
•IPv6 Address: Enter the IPv6 address based on your network requirements.
•IPv6 Prefix Length: Enter the number of characters in the IPv6 prefix.
The IPv6 network (subnet) is identified by the prefix, which consists of the
initial bits of the address. The default prefix length is 64 bits. All hosts in the
network have the identical initial bits for the IPv6 address. The number of
common initial bits in the addresses is set by the prefix length field.
STEP 6 Click OK to save your settings.
STEP 7 Click Save to apply your settings.
STEP 8 If you want to reserve certain IP addresses for specified devices , go to the
Networking > DHCP Reservations page. See Configuring DHCP Reser ved IPs,
page149. You must enable DHCP Server or DHCP Relay mode for this purpose.