122
Verification
Enter Protocol name://WAN port IP address:port number in the address bar of a web browser on a
computer over the internet to access the resources on the web server. In this example, enter
http://202.105.106.55.
If the DDNS function is enabled, you can visit an address in the form of Protocol name://domain
name.
If the administrator still cannot visit the web server in LAN after the configuration, try the following
solutions:
Ensure that the WAN IP address is a public IP address. A private WAN IP address may invalidate the
port forwarding function. Common IPv4 IP addresses include A, B, and C types: A type ranges from
10.0.0.0 to 10.255.255.255; B type ranges from 172.16.0.0 to 172.31.255.255; C type ranges from
192.168.0.0 to 192.168.255.255.
Try accessing Protocol name://domain name:port number
Security software, antivirus software, and the built-in OS firewall of the computer may cause port
forwarding function failures. Disable them and try again.
Assign a static IP address to the DMZ host in case of service interrupt caused by the dynamic IP
address.
7.6.7 Telnet service
With this function enabled, the device can be managed via Telnet. Generally this function is used to
maintain the device by technical professional.
To access the page, choose Advanced > Network Service. By default, the function is disabled.
7.6.8 UPnP
Universal Plug and Play (UPnP) is a set of networking protocols that makes automatic port
forwarding possible. It can identify devices and enable ports for certain applications, such as
Thunder. To use this function, it requires that the operating system support UPnP, or application
software supporting UPnP is installed.
To access the page, choose Advanced > Network Service. By default, the function is disabled. You
can enable it as required.