How to remove access to a port using firewall on Centos7?
Solution 1:
Solution: Do not forget the --runtime-to-permanent
$ firewall-cmd --zone=public --remove-port=10050/tcp
$ firewall-cmd --runtime-to-permanent
$ firewall-cmd --reload
Solution 2:
# firewall-cmd --zone=public --remove-port=12345/tcp --permanent
# firewall-cmd --reload
Replace 12345 with the port you want to remove.