Filter
Top Products
Version 6.2 85 December 2010
SIP Release Notes 1. What's New in Release 6.2
Parameter Description
Static NAT Table
[NATTranslation]
This ini file table parameter defines multiple NATs for SIP control and
RTP media using Static NAT Rules. This table creates NAT rules for
translating source IP address per VoIP interface (SIP control and RTP
media traffic) into NAT IP addresses. This allows, for example, the
separation of VoIP traffic between different ISTP’s, and topology
hiding (of internal IP addresses to the “public” network). Each IP
interface (configured in the Multiple Interface table - InterfaceTable
parameter) 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 format of this parameter is as follows:
[ NATTranslation ]
FORMAT NATTranslation_Index =
NATTranslation_SourceIPInterfaceName,
NATTranslation_TargetIPAddress, NATTranslation_SourceStartPort,
NATTranslation_SourceEndPort, NATTranslation_TargetStartPort,
NATTranslation_TargetEndPort;
[ \NATTranslation ]
Where:
• SourceIPInterfaceName is the name of the IP interface as defined
in the Multiple Interface table.
• TargetIPAddress is the global IP address.
• TargetStartPort and TargetEndPort is the port range (1-66535) of
the global address.
• SourceStartPort and SourceEndPort is the port range (1-66535)of
the IP interface.
Note:
This table can include up to 32 indices.
The device’s priority method for performing NAT is as follows (not
relevant for SBC application):
Uses an external STUN server (STUNServerPrimaryIP parameter)
to assign a NAT address for all interfaces.
Uses the StaticNATIP parameter to define one NAT IP address for
all interfaces.
Uses the NATTranslation parameter to define NAT per interface.
If NAT is not configured (by any of the above-mentioned methods),
the device sends the packet according to its IP address defined in
the Multiple Interface table.
If the StaticNATIP parameter is not configured and the
WANIPAddress parameter is configured, then a NAT rule is
automatically added to this table with an IP address defined for
WANIPaddress and a port range of 0-65535.