General Screen; Port Forwarding Screen - ZyXEL Communications LTE3301 Series User Manual

• Use the
AL G
(Section 10.5 on page
10.2 G e ne ra l Sc re e n
Use this screen to enable NAT and set a default server. Click
Network > NAT > General
Fig ure 55
The following table describes the labels in this screen.
Table 36 Network > NAT > General
L ABEL
Network Address
Translation (NAT)
NAT Loopback
Apply
Cancel
10.3 Po rt Fo rwa rding Sc re e n
Use this screen to forward incoming service requests to the server(s) on your local network and set a
default server. You may enter a single port number or a range of port numbers to be forwarded, and the
local IP address of the desired server. The port number identifies a service; for example, web service is on
port 80 and FTP on port 21. In some cases, such as for unknown services or where one server can support
more than one service (for example both FTP and web service), it might be better to specify a range of
port numbers.
In addition to the servers for specified services, NAT supports a default server. A service request that does
not have a server explicitly designated for it is forwarded to the default server. If the default is not
defined, the service request is simply discarded.
Chapter 10 NAT
screen to enable or disable SIP (VoIP) ALG (Application Layer Gateway) in the LTE3301
92).
DESC RIPT IO N
Network Address Translation (NAT) allows the translation of an Internet protocol address
used within one network (for example a private IP address used in a local network) to a
different IP address known within another network (for example a public IP address used on
the Internet).
Select to activate NAT. Select
Ena b le
NAT loopback allows local users to use a domain name to access a server on the local
network. A packet sent to the public (WAN) IP address is always forwarded to the default
gateway (the LTE3301). With NAT loopback enabled, the LTE3301 uses the WAN interface's
IP address as the packet's source address and treats the packet as if it came from the WAN
interface. The packet then can be forwarded to the local server according to the port
forwarding rule.
Select to activate NAT loopback. Select
Ena b le
Click to save your changes back to the LTE3301.
Apply
Click to begin configuring this screen afresh.
C a nc e l
LTE3301 Series User's Guide
Ne two rk > NAT
to turn it off.
Disa b le
Disa b le
88
to open the
G e ne ra l
to turn it off.
screen.