CTC Union SHDTU03b, User Manual

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14.16.8 LAN
LAN interface parameters can be configured LAN IP address, subnet mask and NAT network type.
>> address LAN IP address and subnet mask
attrib NAT network type
14.16.9 IP share
You can configure Network Address Translation (NAT), Port Address Translation (PAT) and
Demilitarized Zone parameters in
ip_share menu. Move the cursor “ >> ” to ip_share then press enter.
>> nat Configure network address translation
pat Configure port address translation
dmz Configure DMZ host function
NAT (Network Address Translation) is the translation of an Internet Protocol address (IP address) used
within one network to a different IP address known within another network. One network is designated
the inside network and the other is the outside. Typically, a company maps its local inside network
addresses to one or more global outside IP addresses and reverse the global IP addresses of incoming
packets back into local IP addresses. This ensure security since each outgoing or incoming request
must go through a translation process, that also offers the opportunity to qualify or authenticate the
request or match it to a previous request. NAT also conserves on the number of global IP addresses
that a company needs and lets the company to use a single IP address of its communication in the
Internet world.
DMZ (demilitarized zone) is a computer host or small network inserted as a “neutral zone” between a
company private network and the outside public network. It prevents outside users from getting direct
access to a server that has company private data.
14.16.10 NAT
You can configure NAT parameters in
nat menu.
>> virtual Virtual IP address pool
global Global IP address pool
fixed Fixed IP address mapping
The virtual menu contains range of virtual IP address, delete virtual IP address and show virtual IP
address.
>> range Edit virtual IP address pool
delete Delete virtual IP address pool
list Show virtual IP address pool
You can create five virtual IP address pool range in
range command.
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