What would a firewall rule look like that would prevent logging - every 3 seconds - such UDP broadcasts from a Huawei smart meter?
Is there a way to create a suitable firewall rule?
I will try the following rule:
iptables -I INPUT -s 192.168.77.1 -d 255.255.255.255 -p udp --dport 6666 -j DROP
Almost. There is a special chain which sits in front of the IPFire firewall called CUSTOMINPUT. You should put any custom rules into there.
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