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Monday Sept 10 – just to confirm a simple solution to SSH not working with Firewall
Firewall will not allow SSH login unless the firewall has been set to allow SSH. To set the firewall correctly : login to droplet sudo ufw disable sudo ufw allow ssh sudo ufw enable
The sudo app list does not change. BUT the SSH login (eg via Putty using SSH keys) will then work fine. For me this has only happened with 16.04
From droplet console
sudo ufw disable sudo ufw allow ssh
and try ssh login. After login
sudo ufw enable sudo ufw status
You should see:
Status: active To Action From
Apache Full ALLOW Anywhere 22 ALLOW Anywhere Apache Full (v6) ALLOW Anywhere (v6) 22 (v6) ALLOW Anywhere (v6)
Port 22 is ssh port and it is allowed now.