14.5.6. Near-end NAT support for SG vHG boards 
Near-end NAT support can be activated per SG vHG SIP board using AMO-CGWB:
WPUBIP parameter:
- WPUBIP = 0.0.0.0 indicates that near-end NAT support is not active
- WPUBIP = <valid IPv4 internet address> activates near-end NAT support for the specified vHG board
Near-end NAT support can be combined with separated WAN/DMZ network configuration:
- USEWANIF=YES indicates that vHG board is connected to the DMZ firewall via separated WAN/DMZ network
- USEWANIF=NO indicates that shared LAN/DMZ network is used.
Near-end NAT feature supports both TRADITIO as well as SECURE SIP trunks.
SG vHG board can be configured to host SIP SRS (Secure Remote Subscriber)
functionality together with Near-end NAT SIP trunk if USEWANIF=YES is
active.
Figure 268. Dedicated SG vHG SIP trunk board with configured near-end NAT - common LAN/DMZ between vHG and DMZ firewall
Figure 269. Dedicated SG vHG SIP trunk board with configured near-end NAT and WANIF (optionally combined with SIP SRS subscriber functionality)
