AudioCodes Mediant 3000 User Manual page 168

device's NAT traversal mechanism replaces the source IP address of SIP messages sent
from a specified VoIP interface to a public IP address. This allows, for example, the
separation of VoIP traffic between different ITSP's, and topology hiding of internal IP
addresses from the "public" network. Each IP network interface, configured in the Interface
table, can be associated with a NAT rule, translating the source IP address and port of the
outgoing packet into the NAT address (IP address and port range).
The following procedure describes how to configure NAT translation rules through the Web
interface. You can also configure it through ini file (NATTranslation).

To configure NAT translation rules:
1. Open the NAT Translation table (Configuration tab > VoIP menu > VoIP Network >
NAT Translation Table).
2. Click Add; the following dialog box appears:
Figure 13-11: NAT Translation Table - Add Row Dialog Box
3. Configure a NAT translation rule according to the parameters described in the table
below.
4. Click Add, and then save ("burn") your settings to flash memory.
Table 13-15: NAT Translation Table Parameter Descriptions
Parameter
Index
[NATTranslation_Inde
x]
Source Interface
[NATTranslation_SrcI
PInterfaceName]
Target IP Address
[NATTranslation_Targ
etIPAddress]
User's Manual
Defines an index number for the new table row.
Note: Each row must be configured with a unique index.
Assigns an IP network interface to the rule. Outgoing packets sent from the
specified network interface are NAT'ed.
By default, no value is defined (None).
For configuring IP network interfaces, see ''Configuring IP Network
Interfaces'' on page 145.
Defines the global (public) IP address. The device adds the address to the
SIP Via header, Contact header, 'o=' SDP field, and 'c=' SDP field, in the
outgoing packet.
Description
168
Mediant 3000
Document #: LTRT-89730