Nat Port Forwarding; Dhcp Table Window - Patton SmartNode SN101/1JS/E User Manual

SmartNode 100 Series ATA User Manual
DHCP client computers connected to the unit will have their information displayed in the DHCP Client
List table (click the DHCP Table tab to display the table). The table displays the type, host name, IP
address, MAC address, description, and expired time of the DHCP lease for each client computer.
DHCP Server is a useful tool that automates the assignment of IP addresses to numbers of computers in
your network. The server maintains a pool of IP addresses that you use to create scopes. (A DHCP scope is
a collection of IP addresses and TCP/IP configuration parameters that are available for DHCP clients to
lease.) Then, the server automatically allocates these IP addresses and related TCP/IP configuration set-
tings to DHCP-enabled clients in the network. The DHCP Server leases the IP addresses to clients for a
period that you specify when you create a scope. A lease becomes inactive when it expires. Through the
DHCP Server, you can reserve specific IP addresses permanently for hardware devices that must have a
static IP address (e.g., a DNS Server).
An advantage of using DHCP is that the service assigns addresses dynamically. The DHCP Server returns
addresses that are no longer in use to the IP addresses pool so that the server can reallocate them to other
machines in the network. If you disable this DHCP, you would have to manually configure IP for new
computers, keep track of IP addresses so that you could reassign addresses that clients aren't using, and
reconfigure computers that you move from one subnet to another. The DHCP Static MAP table lists all
MAC and IP address which are active now.
4. Set the Assigned DHCP IP Address by typing the starting IP address for the DHCP server's IP assignment
and the ending IP address for the DHCP server's IP assignment.
5. Set the DHCP IP Lease Time by assigning the length of time for the IP lease. The default setting is 86400
seconds.
6. Click the Apply button.

NAT Port Forwarding

Port forwarding is an application of network address translation (NAT) that redirects a communication request
from one address and port number combination to another while the packets are traversing a network gateway,
such as a router or firewall. In other words, port forwarding is used when someone on an outside network
(public network) wants to access a service running on a private network machine. An example where port for-
warding is applicable is if you plan to run a web, email, or file server on your computer.

NAT Port Forwarding

Figure 43. DHCP Table window
5 • Network Settings
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