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Solution: You can configure the port forwarding function to reach the goal.
Assume that the information of the FTP server includes:
− IP address: 192.168.0.136
− MAC address: D4:61:DA:1B:CD:89
− Service port: 21
− The WAN IP address of the router: 102.33.66.88.
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Please ensure that router obtains an IP address from the public network. This function may not
work on a host with an IP address of a private network or an intranet IP address assigned by ISPs
that start with 100. Common IPv4 addresses are classified into class A, class B and class C. Private
IP addresses of class A range from 10.0.0.0 to 10.255.255.255; Private IP addresses of class B range
from 172.16.0.0 to 172.31.255.255; Private IP addresses of class C range from 192.168.0.0 to
192.168.255.255.
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ISPs may block unreported web services to be accessed with the default port number 80.
Therefore, when the default LAN port number is 80, please change it to an uncommon port
number (1024 to 65535) manually, such as 9999.
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The LAN port number and the WAN port number can be different.
Configuring procedures:
Step 1 Start a web browser on a device connected to the router and visit tendawifi.com to log in
to the web UI of the router.
Step 2 Add a port forwarding.
1. Choose Advanced > Port Forwarding.
2. Enter the Internal IP Address, which is 192.168.0.136 in this example.