- 39 -
Enable There are two DDNS provider to be selected in order to register your
device: DynDNS.org and TZO.
Hostname The DDNS server’s Domain name.
Interface The WAN interface over which your device will be accessed.
Username Username assigned by the DDNS provider.
Password Password assigned by the DDNS provider.
Email Email assigned by the DDNS provider.
Key The key assigned by the DDNS provider.
6.5. Firewall Configuration
6.5.1 ALG
An application-level gateway consists of a security component that augments a firewall or NAT
function which is employed in a computer network. It allows customized NAT traversal filters to be
plugged into the gateway to support address and port translation for certain application layer
"control/data" protocols such as FTP, BitTorrent, SIP, RTSP, file transfer in IM applications.