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Figure 83 Network Setting > NAT > ALG
The following table describes the fields in this screen.
Table 60 Network Setting > NAT > ALG
LABEL
NAT ALG
SIP ALG
RTSP ALG
Apply
Cancel
11.7 The Address Mapping Screen
Ordering your rules is important because the VMG applies the rules in the order that you specify.
When a rule matches the current packet, the VMG takes the corresponding action and the
remaining rules are ignored.
Click Network Setting > NAT > Address Mapping to display the following screen.
Figure 84 Network Setting > NAT > Address Mapping
The following table describes the fields in this screen.
Table 61 Network Setting > NAT > Address Mapping
LABEL
Add new rule
Set
Local Start IP
Local End IP
Global Start IP
Global End IP
Chapter 11 Network Address Translation (NAT)
DESCRIPTION
Enable this to make sure applications such as FTP and file transfer in IM applications work
correctly with port-forwarding and address-mapping rules.
Enable this to make sure SIP (VoIP) works correctly with port-forwarding and address-
mapping rules.
Enable this to have the VMG detect RTSP traffic and help build RTSP sessions through its
NAT. The Real Time Streaming (media control) Protocol (RTSP) is a remote control for
multimedia on the Internet.
Click Apply to save your changes.
Click Cancel to restore your previously saved settings.
DESCRIPTION
Click this to create a new rule.
This is the index number of the address mapping set.
This is the starting Inside Local IP Address (ILA).
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.
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.
This is the ending Inside Global IP Address (IGA). This field is blank for One-to-One and
Many-to-One mapping types.
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