firewall port open in linux centos7 code example

Example 1: firewall port open centos

firewall-cmd --zone=public --add-port=2888/tcp --permanent
Then remember to reload the firewall for changes to take effect.

firewall-cmd --reload

Example 2: open firewall port in linux

Debian: sudo ufw allow PORT. CentOS: sudo firewall-cmd --zone=public --permanent --add-port=PORT/tcp sudo firewall-cmd --reload

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