In new firewall-cmd you must do next step as root to redirect port 514 to 5514, so logs will be recibed at port 5514:
firewall-cmd --zone=public --add-masquerade --permanent
firewall-cmd --zone=public --add-forward-port=port=514:proto=udp:toport=5514 --permanent
Then add in web interface > setup > input data > udp > add input data
create the listening port "5514" next and set type of logs "syslog" next next... finish
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