Figure 41. General settings of firewall
➢ Input: Packets that accessing router’s IP.
➢ Output: Packets sent from the router.
➢ Forward: Data forwarding between interfaces, without routing itself.
➢ Masquerading: IP masquerading automatically, which is meaningful for the WAN port and 5G port,
the masquerading for IP when access the external.
➢ MSS clamping: Limit the large of the MSS, generally it is 1460.
The first rule:
➢ The input, output, and forward packet from LAN to WAN is accept by default.
➢ Forward: If the data package will access the WAN from the LAN, so the rule allows data package from
the LAN to WAN.
➢ Input: Open the webpage of the router when you under the LAN.
➢ Output: The router accesses the extern net, like NTP.
The second rule:
➢ WAN and 5G interface receive the input, output and forward packet by default.
➢ If there is input data package and it will be allowed. Such as someone will login the webpage of the
router from the WAN.
➢ Same as the input, the output will be allowed if access the external net from the WAN or 4G of the
router.
➢ The forward package is also allowed, data packets from the WAN port want to be forwarded to the LAN.
6.2. Port forward
6.2.1. Port forward
A port forward is a way of making a computer on your home or business network accessible to computers on
the internet, even though they are behind a router or firewall.
Up to 100 port forwards can be added.
Table 12. Parameter details of port forward
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