Asus RT-N14UHP - Manual (Page 69)

Enable wildcard: Enable wildcard if your DDNS service
requires one.
• DDNS service will not work under these conditions:
• When the wireless router is using a private WAN IP address
(1.18.x.x, 10.x.x.x, or 1.1.x.x), as indicated by a yellow
text.
• The router may be on a network that uses multiple NAT tables.
NAT Passthrough
NAT Passthrough allows a Virtual Private Network (VPN)
connection to pass through the router to the network clients.
PPTP Passthrough, LTP Passthrough, IPsec Passthrough and RTSP
Passthrough are enabled by default.
To enable / disable the NAT Passthrough settings, go to the
Advanced Settings > WAN > NAT Passthrough tab. When done,
click Apply.
•