Atlantis Land 111U - Manual (Page 74)

74
10.2 NAT
The NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP
address of a host in a packet. The default setting is Dynamic NAPT. It provides
dynamic Network Address Translation capability between LAN and multiple WAN
connections, and the LAN traffic is routed to appropriate WAN connections based on
the destination IP addresses and Route Table. This eliminates the need for the static
NAT session configuration between multiple LAN clients and multiple WAN
connections.
Field Meaning
Virtual Circuit VPI (Virtual Path Identifier) and VCI (Virtual Channel
Identifier) define a virtual circuit. There are eight
groups of PVC can be defined and used
Number of IPs User can select Single or Multiple
10.2.1 DMZ
The DMZ Host is a local computer exposed to the Internet. When setting a particular
internal IP address as the DMZ Host, all incoming packets will be checked by the
Firewall and NAT algorithms then passed to the DMZ host, when a packet received
does not use a port number used by any other Virtual Server entries.
Field Meaning
DMZ Disabled: As set in default setting, it disables the DMZ
function.
Enabled: It activates your DMZ function.
DMZ Host Address Give a static IP address to the DMZ Host when Enabled
radio button is checked. Be aware that this IP will be
exposed to the WAN/Internet.
10.3 Virtual Server
In TCP/IP and UDP networks a port is a 16-bit number used to identify which
application program (usually a server) incoming connections should be delivered to.
Some ports have numbers that are pre-assigned to them by the IANA (the Internet