Waveshare WS-431E User Manual page 49

WS-431E
4G Router
If TCP+UDP is selected as the protocol, the specified destination IP can be ping for the

specified source IP, and the TCP/UDP connection cannot be established;
If ICMP is selected as the protocol, the specified source IP cannot ping the specified target IP,

and TCP/UDP connection can be established;
If All protocols is selected, the specified destination IP cannot be ping for the specified

source IP, and the TCP/UDP connection cannot be established.
< Note >
If you want to disable a port of a subnet device from accessing the specified target IP (or a
port of the specified target IP), the protocol cannot choose All protocols or ICMP.
This example chooses TCP protocol.
www.waveshare.com
Figure 52 Firewall setting 1
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