S-Series IP PBX Administrator Guide
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address/port.
No: use NAT mode only according to RFC3581.
Never: never attempt NAT mode or RFC3581 support.
Route: use NAT but do not include rport in headers.
2) External IP Address
Figure 9-3 NAT Settings – External IP Address
Table 9-6 External IP Address Configuration Parameters
The IP address that will be associated with outbound SIP
messages if the system is in a NAT environment.
Local Network Identification
Used to identify the local network using a network
number/subnet mask pair when the system is behind a
NAT or firewall. Some examples are as follows:
“192.168.0.0/255.255.0.0”, “10.0.0.0/255.0.0.0”, and
“172.16.0.0/12”.
Global NAT configuration for the system. The options are
as follows:
Yes: use NAT and ignore the address information in
the SIP/SDP headers and reply to the sender's IP
address/port.
No: use NAT mode only according to RFC3581.
Never: never attempt NAT mode or RFC3581 support.
Route: use NAT but do not include rport in headers.
3) External Host
Figure 9-4 NAT Settings – External Host
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