Question

Ubuntu 12.04 changing default ssh port: connection refused

Hello,

I edited my /etc/ssh/sshd_config changing Port 22 to Port 1023. Restarted service and now I can’t connect.

Do I have to open port in firewall also? If so, how can I do this?

If I change back config to port 22 it works again.


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If you changed the port (in sshd_config file), opened the door on the firewall, you may need to update the selinux:

#semanage port -a -t ssh_port_t -p tcp 1023

Yes. If you’ve changed the port for SSH, you need to open that port in your iptables rules. You can also go ahead and close port 22.

root@graywoods:~# iptables-save <br># Generated by iptables-save v1.4.12 on Thu May 29 18:58:35 2014 <br>*filter <br>:INPUT ACCEPT [0:0] <br>:FORWARD ACCEPT [0:0] <br>:OUTPUT ACCEPT [255317:199083580] <br>-A INPUT -i lo -j ACCEPT <br>-A INPUT -d 127.0.0.0/8 -j REJECT --reject-with icmp-port-unreachable <br>-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT <br>-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT <br>-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT <br>-A INPUT -j DROP <br>-A FORWARD -j DROP <br>COMMIT <br># Completed on Thu May 29 18:58:35 2014 <br>