BroadSoft SIP Trunk
Quick Guide 18 Document #: LTRT-14020
5.2.2 Configure NAT
Note:
• NAT configuration is applicable only if you are behind a firewall NAT (see
• Method B).
• The NAT IP Address is the Global-IP-address used in front of the firewall facing the
BroadSoft service. If the DMZ holds the global-IP-address (no NAT is performed by
the firewall) and the Gateway is already assigned the Global-IP-address as its
address, skip this NAT configuration.
Configure the global IP address as follows:
1. Open the NAT Translation table (Setup menu > IP Network tab > Core Entities
folder > NAT Translation).
2. Click New; the following dialog appears:
Figure 5-5: NAT Translation Table - Dialog Box
3. Use the table below as reference when configuring a NAT translation rule.
Figure 5-6: NAT Translation Table Parameter Descriptions
Parameter Description
Index
0
Source Interface
Voice (the interface to apply this rule to)
Target IP Address
Global-IP-address. Defines the global (public) IP
address.
Source Start Port (leave empty)
Source End Port (leave empty)
Target Start Port (leave empty)
Target End Port (leave empty)
4. Click Apply.
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