User's Manual 130 Document #: LTRT-42060
Mediant 2600 E-SBC
12.9.1.1 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.
The following procedure describes how to configure a static NAT address in the Web
interface. You can also configure this using the ini file parameter, StaticNATIP or CLI
command, configure voip > sip-definition general-settings > nat-ip-addr.
To configure a single static NAT IP address:
1. Open the SIP General Parameters page (Configuration tab > VoIP menu > SIP
Definitions > General Parameters).
Figure 12-13: 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, and then reset the device with a burn-to-flash for your settings to take
effect.
12.9.1.2 Configuring NAT Translation per IP Interface
The NAT Translation table lets you configure up to 32 network address translation (NAT)
rules for translating source IP addresses into NAT IP addresses (global - public) when the
device is located behind NAT. The device's NAT traversal mechanism replaces the source
IP address of SIP messages sent from a specific VoIP interface (Control and/or Media) in
the IP Interfaces table 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 to the
“public” network. Each IP interface (configured in the 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.
The following procedure describes how to configure NAT translation rules in the Web
interface. You can also configure Bandwidth Profiles using the table ini file parameter,
NATTranslation or CLI command, voip-network NATTranslation.
To configure NAT translation rules:
1. Open the NAT Translation Table page (Configuration tab > VoIP menu > VoIP
Network > NAT Translation Table).
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