ZyXEL Communications wireless n gigbit router zyxel User Manual

Chapter 11 Network Address Translation (NAT)

NBG-460N User’s Guide

Note: Only one LAN computer can use a trigger port (range) at a time.

Figure 118   Network > NAT > Advanced 

The following table describes the labels in this screen.

Table 60   Network > NAT > Advanced

Max NAT/
Firewall Session 
Per User

Type a number ranging from 1 to 16000 to limit the number of NAT/
firewall sessions that a host can create.

When computers use peer to peer applications, such as file 

sharing applications, they may use a large number of NAT 

sessions.

 If you do not limit the number of NAT sessions a single client 

can establish, this can result in all of the available NAT sessions being 
used. In this case, no additional NAT sessions can be established, and 
users may not be able to access the Internet. 

Each NAT session establishes a corresponding firewall session. Use this 
field to limit the number of NAT/firewall sessions each client computer 
can establish through the NBG-460N. 

If your network has a small number of clients using peer to peer 
applications, you can raise this number to ensure that their 
performance is not degraded by the number of NAT sessions they can 
establish. If your network has a large number of users using peer to 
peer applications, you can lower this number to ensure no single client 
is using all of the available NAT sessions.

Port Triggering Rules
#

This is the rule index number (read-only).