GIT – I’ve edited /etc/ssh/sshd_config to change the port number:

Port 1255

However, I’m getting an error as follows:

sshd[26792]: error: Bind to port 1255 on 192.168.1.100 failed: Permission denied

How do I change default OpenSSH port number from 22 to 1255 under RedHat Enterprise server version 6 and ?

By default SELinux only allows port number 22. To display current port contexts, enter:
semanage port -l | grep ssh
Sample outputs:

ssh_port_t                     tcp      22

To add port 1255 to port contexts, enter:
# semanage port -a -t ssh_port_t -p tcp 1255
You can verify new settings, enter:
semanage port -l | grep ssh
Sample outputs:

ssh_port_t                     tcp      1255,22

Finally, reload or restart the OpenSSH server, enter:
/sbin/service sshd reload
Verify, sshd is listing on TCP port # 1255, enter:
# netstat -tulpn | grep 1255

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