SSH Connection scenarios with 'Operation timed out' on Ubuntu 22.04 after Firewall Changes
I'm currently experiencing an scenario where my SSH connection to an Ubuntu 22.04 server is failing with the behavior message 'Operation timed out'. This started happening after I modified some firewall rules using UFW. I initially allowed SSH traffic using the command `sudo ufw allow ssh`, which worked fine. However, I then added a rule to restrict access to only a specific IP range with `sudo ufw allow from 192.168.1.0/24 to any port 22`. Since then, I need to connect to the server anymore, even from an IP address within that range. I've tried to revert the changes by running `sudo ufw delete allow from 192.168.1.0/24 to any port 22` and ensuring that the default policy is set to allow SSH with `sudo ufw allow ssh`. Running `sudo ufw status` shows that SSH is allowed, but I still need to connect. Here's the output from the `ufw status` command: ``` Status: active To Action From -- ------ ---- 22 ALLOW Anywhere 22 (v6) ALLOW Anywhere (v6) ``` I also checked the `/etc/ssh/sshd_config` file for any restrictions and it seems fine: ``` # Port 22 PermitRootLogin prohibit-password PasswordAuthentication yes ChallengeResponseAuthentication no UsePAM yes ``` Could there be something I’ve overlooked or a deeper scenario with the SSH configuration or UFW setup? Any insights would be greatly appreciated.