Using Network Objects
Chapter 6: Managing Your Network
95
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Nortel IP Phone
To enable Nortel IP phones to receive their configuration, type the
phone's configuration string.
Thomson IP Phone
To enable Thomson IP phones to receive their configuration, type the
phone's configuration string.
Using Network Objects
You can add individual computers or networks as network objects. This enables you to
configure various settings for the computer or network represented by the network object.
You can configure the following settings for a network object:
•
Static NAT (or One-to-One NAT)
Static NAT allows the mapping of Internet IP addresses or address ranges to hosts
inside the internal network. This is useful if you want a computer in your private
network to have its own Internet IP address. For example, if you have both a mail
server and a Web server in your network, you can map each one to a separate Internet
IP address.
Static NAT rules do not imply any security rules. To allow incoming traffic to a host
for which you defined Static NAT, you must create an Allow rule. When specifying
firewall rules for such hosts, use the host’s internal IP address, and not the Internet IP
address to which the internal IP address is mapped. For further information, see
Using
Rules
on page 172.
Note:
Static NAT and Hide NAT can be used together.
Note:
The ZoneAlarm router supports Proxy ARP (Address Resolution Protocol).
When an external source attempts to communicate with such a computer, the
ZoneAlarm router automatically replies to ARP queries with its own MAC address,
thereby enabling communication. As a result, the Static NAT Internet IP addresses
appear to external sources to be real computers connected to the WAN interface.
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