Why I am not able to connect Ubuntu server with SSH key?

tauqeerahmad24

1/16/24, 8:47 AM

I have Ubuntu server 22.4 and I it had SSH server installed. Time to time SSH connection was doping even while I was working. I update the SSH by using command sudo apt-get update ssh. After the update, I am not able to connect to my server via SSH.

What I have done so far?

I restart the Server
I re-install the ssh
I switched off the firewall.
when run ps -ef | grep ssh I see the following result. enter image description here
sudo systemctl status ssh show active and running.
I also increase the time for ping to 60 sec and restart the SSH services and server.
When I use the same static IP it show error of time out as follow.

Session stopped Press to exit tab Press R to restart session Press S to save terminal output to file Network error: Connection timed out

When I change the IP address I see this error

Pinging 153.70.70.70 with 32 bytes of data:
Reply from 192.123.1.2: Destination host unreachable.
Reply from 192.123.1.2: Destination host unreachable.
Reply from 192.123.1.2: Destination host unreachable.
Reply from 192.123.1.2: Destination host unreachable.

Ping statistics for 153.70.70.70:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Now I have noting left to try and still not able to find the core issue. Please help me out to find, what exactly the problem is and how to resolve it.

0 + 2

server

ssh

networking

openssh

sshd

pa4080

1/16/24, 9:22 AM

I can't understand how `ping` reports *Destination host unreachable.* and in the same time *0% loss*? However, in case you can connect to the server and the connection drops randomly, first I will suppose it is hardware problem on the route - broken cable, switch, router, etc. You can keep the `ping` command alive for a longer period, 30 mins for example, to check that. In addition, please, don't post text as image, just copy/paste the output of your command and use the formatting tools of the form to make it nice for reading.

tauqeerahmad24

1/16/24, 9:44 AM

Hi pa4080, I normally copy past but non of the ssh connection work that's why I go directly inside of server and copy past don't work. Let me increase it for 30 min a see.

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