AudioCodes Mediant 2000

Version 6.6 127 Mediant 2000
User's Manual 11. Network
11.9.1.2 Configuring a Static NAT IP Address for All Interfaces
You can configure a global (public) IP address of the router to enable static NAT between
the device and the Internet for all network interfaces. Thus, the device replaces the source
IP address for media of all outgoing SIP messages sent on any of its network interfaces to
this public IP address.
Note:
The NAT IP address can also be configured using the ini file parameter,
StaticNATIP.
 To configure a single static NAT IP address for all interfaces:
1. Open the SIP General Parameters page (Configuration tab > VoIP menu > SIP
Definitions submenu > General Parameters).
Figure 11-12: Configuring Static NAT IP Address in SIP General Parameters Page
2. In the 'NAT IP Address' field, enter the NAT IP address in dotted-decimal notation.
3. Click Submit.
4. Save the setting to the device's flash memory with a device reset (see 'Saving
Configuration' on page 396).
11.9.1.3 Configuring NAT Translation per IP Interface
The NAT Translation table defines network address translation (NAT) rules for translating
source IP addresses per VoIP interface (SIP control and RTP media traffic) into NAT IP
addresses (global or public), when the device is located behind NAT. This allows, for
example, the separation of VoIP traffic between different ITSP’s, and topology hiding of
internal IP addresses to the “public” network. Each IP interface (configured in the Multiple
Interface table) can be associated with a NAT rule in this table, translating the source IP
address and port of the outgoing packet into the NAT address (IP address and port range).
The device's NAT traversal mechanism replaces the source IP address of SIP messages
sent from a specified VoIP interface to a public IP address.
Note:
The NAT Translation table can also be configured using the table ini file
parameter, NATTranslation.