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I have blocked all these method in my firewalld public zone but yet any of these not work. I wanted to block a UDP port on Cenots 7. these are the rules i tried, also public zone is my only active zone.

firewall-cmd --permanent --zone=public --add-rich-rule='rule family=ipv4 source address=123.123.123.123 port port=1212 protocol=udp drop'

firewall-cmd --permanent --zone=public --add-rich-rule='rule family=ipv4 port port=1212 protocol=udp drop'

firewall-cmd --permanent --zone=public --add-rich-rule='rule family=ipv4 source address=123.123.123.123 port port=1212 protocol=udp reject'
Paul Kertscher
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Praneeth Perera
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