ZyXEL Communications EX3510-B1, User Manual

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Chapter 11 Network Address Translation (NAT)
EX3510-B1 User’s Guide
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Setting > NAT > Sessions to display the following screen.
Note: Enter a number of concurrent NAT sessions in the MAX NAT Session Per Host field, and
click Apply to limit the number of concurrent NAT sessions a client can use. Otherwise,
clear the number in the MAX NAT Session Per Host field. Click Apply and there's no limit
for concurrent NAT sessions a client can use.
Figure 108 Network Setting > NAT > Sessions
The following table describes the fields in this screen.
11.8 Technical Reference
This part contains more information regarding NAT.
11.8.1 NAT Definitions
Inside/outside denotes where a host is located relative to the Zyxel Device, for example, the computers
of your subscribers are the inside hosts, while the web servers on the Internet are the outside hosts.
Global/local denotes the IP address of a host in a packet as the packet traverses a router, for example,
the local address refers to the IP address of a host when the packet is in the local network, while the
global address refers to the IP address of the host when the same packet is traveling in the WAN side.
Note that inside/outside refers to the location of a host, while global/local refers to the IP address of a
host used in a packet. Thus, an inside local address (ILA) is the IP address of an inside host in a packet
when the packet is still in the local network, while an inside global address (IGA) is the IP address of the
Table 66 Network Setting > NAT > Sessions
LABEL DESCRIPTION
MAX NAT
Session Per Host
(0 ~ 20480) Use this field to set a limit to the number of concurrent NAT sessions each client host can have.
If only a few clients use peer to peer applications, you can raise this number to improve their
performance. With heavy peer-to-peer application use, lower this number to ensure no single
client uses too many of the available NAT sessions.
Cancel Click this to restore the default or previously saved settings.
Apply Click this to save your changes on this screen.