USR-G808 User Manual
Technical Support:
Jinan USR IOT Technology Limited
www.usriot.com
47
3.2.14. Firewall
3.2.14.1. Basic Setting
Default two firewall rule.
Diagram 3.2.14.1-1 Firewall Setting Webpage
Noun introduce:
Input: the data package of the router’s IP
Output: the package router will send
Masquerading: IP masquerading automatically, which is meaningful for the WAN port and 4G port, the
masquerading for IP when access the external net.
MSS clamping: limit the large of the MSS, generally it is 1460.
1. Rule1
The input and forward from LAN to WAN, default is accept.
If the data package will access the WAN from the LAN, so the rule allow data package from the LAN to WAN: this is
forward.
Open the webpage of the router when you under the LAN: this is input
The router access the external net, like NTP: this is output
2. Rule2
WAN, 4G1 and 4G2 interface, default receive the input and output, reject the forward
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 allow if access the external net from he WAN or 4G of the router.
As to the forward data package, forward the data package from the WAN to 4G is not allowed.
For example:
If add a new net interface, just like create a VPN interface, then you should add a rule to access the external.
