The Fake Ip Screen - ZyXEL Communications X6004 User Manual

6.10 The Fake IP Screen

Use this screen to configure settings that may help you to avoid any potential VoIP
problems that result from having your X6004 behind a NAT router.
When enabled, the X6004 replaces the IP address inside all outgoing SIP packets
with the IP address of the upstream NAT router on your network. When the
packets get to their destination, the destination device can send its response to
the embedded address of the NAT router. The NAT router then forwards the
packets downstream to the X6004, which in turn sends them to the device on the
local end of the telephone conversation.
Note: This feature should be used if the NAT router does not utilize SIP ALG.
Click Configuration > PBX > Server Configuration > Server > Fake IP to
view the screen as shown next.
Figure 64 Server > Fake IP
Each field is described in the following table.
Table 30 Server > Fake IP
LABEL
Fake IP
Fake IP Setting
Apply
Reset
X6004 User's Guide
DESCRIPTION
Select Disable to turn this feature off or Enable to turn it on.
By default, the Fake IP feature is disabled.
If you enable it, you must assign a value to the Fake IP Setting field.
Enter the public IP address that the upstream NAT router uses to send
out the X6004's SIP traffic. This is the IP address that will be inserted
into all outgoing SIP traffic.
Click this to save your changes.
Click this to set every field in this screen to its last-saved value.
Chapter 6 Server
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