Cannot login into Ubuntu via SSH 1

[ComputersUnlimited]

I changed the port number of ssh in the sshd_config file and was able to login via the new port number. I rebooted the server and now I cannot log in with the new port number. I can only login if I change the port back to 22.

I had fail2ban, denyhosts and UFW installed prior to changing the port. I have stopped fail2ban, denyhosts and UFW but still cannot login.

Any assistance is appreciated.

 

[ChrisHirst]

Did you open the new port through the firewall or in iptables before rebooting?


Other than that "Need more input" as "cannot log in" is somewhat vague./

Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.

Never mind this jesus character, stars had to die for me to live.

 

[ComputersUnlimited]

I have stopped the UFW firewall and still get the same result

Login was probably the wrong choice of wording. Before rebooting I was able to access the system just fine, after rebooting I get an error that says "Network error: the connection timed out". When I try to make the connection the black Window opens with the green cursor a few seconds later the error is displayed. If I change the port back to 22 I can connect with no problem.

 

[ChrisHirst]

If I change the port back to 22 I can connect with no problem.

Then the most probable cause is that the port is not open in iptables, I don't use UFW to manage iptables but I would hazard a guess that stopping UFW does NOT stop iptables as well, as UFW is just a management GUI for iptables, not the firewall itself.

Try executing this;

sudo iptables -A INPUT -p tcp --dport [nnnn] -j ACCEPT

replacing [nnnn] with the port you set for sshd, then see if you can login/access the server.

Chris.

Indifference will be the downfall of mankind, but who cares?
Time flies like an arrow, however, fruit flies like a banana.

Never mind this jesus character, stars had to die for me to live.

 

[ComputersUnlimited]

For some reason the new rule wouldn't enter into the iptables, but you did help point me in the right direction.

I had the purpose of iptables backward, I thought it was to tel the firewall what to allow and what to block.

Thanks for the help, I am familiar linux but only a newb to it.