SELinux allow non default SSH port
By default, SELinux only allows running SSH service on default port 22. For security, it is better to change the SSH port to a non-standard port. On Systems running SELinux, sshd service will fail to start if you change the SSH port.
To allow a custom SSH port, run
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semanage port -a -t ssh_port_t -p tcp SSH_PORT_HERE |
For example, to alow sshd service run on port 3333, use
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semanage port -a -t ssh_port_t -p tcp 3333 |
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