ZyXEL Communications VMG1312-B10C, User Manual

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Chapter 10 Network Address Translation (NAT)
VMG1312-B10C User’s Guide
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The following table describes the fields in this screen.
10.7 The Address Mapping Screen
Ordering your rules is important because the Device applies the rules in the order that you specify.
When a rule matches the current packet, the Device takes the corresponding action and the
remaining rules are ignored.
Click Network Setting > NAT > Address Mapping to display the following screen.
Figure 83
Network Setting > NAT > Address Mapping
The following table describes the fields in this screen.
Table 60
Network Setting > NAT > ALG
LABEL DESCRIPTION
NAT ALG Enable this to make sure applications such as FTP and file transfer in IM applications work
correctly with port-forwarding and address-mapping rules.
SIP ALG Enable this to make sure SIP (VoIP) works correctly with port-forwarding and address-
mapping rules.
Apply Click Apply to save your changes.
Cancel Click Cancel to restore your previously saved settings.
Table 61
Network Setting > NAT > Address Mapping
LABEL DESCRIPTION
Add new rule Click this to create a new rule.
Set This is the index number of the address mapping set.
Local Start IP This is the starting Inside Local IP Address (ILA).
Local End IP This is the ending Inside Local IP Address (ILA). If the rule is for all local IP addresses, then
this field displays 0.0.0.0 as the Local Start IP address and 255.255.255.255 as the Local
End IP address. This field is blank for
One-to-One mapping types.
Global Start IP This is the starting Inside Global IP Address (IGA). Enter 0.0.0.0 here if you have a dynamic
IP address from your ISP. You can only do this for the
Many-to-One mapping type.
Global End IP This is the ending Inside Global IP Address (IGA). This field is blank for One-to-One and
Many-to-One mapping types.