Remote Ua Behind Nat - AudioCodes Mediant 800B User Manual

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 12-18: NAT Translation Table Parameter Descriptions
Parameter
Index
index
[NATTranslation_Index]
Source Interface
src-interface-name
[NATTranslation_SrcIPInterfaceName]
Target IP Address
target-ip-address
[NATTranslation_TargetIPAddress]
Source Start Port
src-start-port
[NATTranslation_SourceStartPort]
Source End Port
src-end-port
[NATTranslation_SourceEndPort]
Target Start Port
target-start-port
[NATTranslation_TargetStartPort]
Target End Port
target-end-port
[NATTranslation_TargetEndPort]

12.10.2 Remote UA behind NAT

12.10.2.1 SIP Signaling Messages
By default, the device resolves NAT issues for SIP signaling, using its NAT Detection
mechanism. The NAT Detection mechanism checks whether the endpoint is located behind
NAT, by comparing the incoming packet's source IP address with the SIP Contact header's
IP address. If the packet's source IP address is a public address and the Contact header's
IP address is a local address, the device considers the endpoint as located behind NAT. In
this case, the device sends the SIP messages to the endpoint, using the packet's source IP
address. Otherwise (or if you have disabled the NAT Detection mechanism), the device
sends the SIP messages according to the SIP standard RFC 3261, where requests within
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 135.
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.
Defines the optional starting port range (1-65536) of the IP
interface, used as matching criteria for the NAT rule. If not
configured, the match is done on the entire port range. Only
IP addresses and ports of matched source ports will be
replaced.
Defines the optional ending port range (1-65536) of the IP
interface, used as matching criteria for the NAT rule. If not
configured, the match is done on the entire port range. Only
IP addresses and ports of matched source ports will be
replaced.
Defines the optional starting port range (1-65536) of the
global address. If not configured, the ports are not replaced.
Matching source ports are replaced with the target ports.
This address is set in the SIP Via and Contact headers, as
well as in the o= and c= SDP fields.
Defines the optional ending port range (1-65536) of the
global address. If not configured, the ports are not replaced.
Matching source ports are replaced with the target ports.
This address is set in the SIP Via and Contact headers, as
well as in the o= and c= SDP fields.
156
Mediant 800B Gateway and E- SBC
Description
Document #: LTRT-10296