User Documentation

Version 1.2 / August 2020 Page 32 / 102

4.2.3 Configuration → Packet filter (Firewall)

Packet filter → Tab Layer 3

Configuration → Packet filter → Tab „Layer 3”

Function

This is the window for the manual configuration of firewall filter rules based on Layer 3 (IP

layer). The screenshot shows the firewall settings as delivered with the default rule "Al-

low_L3*". This rule says that any IP protocol (*) and any traffic regardless the direction

(source and destination=*) is allowed. The result is that - on delivery - the firewall is "open"

on layer 3.

For more detailed information about using the packet filter please refer to firewall-related

application notes in appendix A.

Packet filter → Tab Layer 2

Configuration → Packet filter → Tab „Layer 2“

Function

This is the window for the manual configuration of firewall filter rules based on Layer 2

(MAC layer). The screenshot shows the firewall settings as delivered with the 2 default rules

"Allow_L2*" and „ARP*“ (Address resolution protocol). The rule Allow_L2* allows transmit-

ting any Ethernet frame type (*) and any traffic regardless the direction (source and destina-

tion mac address =*). The result is that - on delivery - the firewall is "open" for layer 2.