I want to deny all outgoing traffic by default, except ssh connections. I added this rules:

ufw default deny outgoing
ufw allow ssh

Then I restarted the firewall by:

ufw disable
ufw enable 

Should this do the trick? I also want to deploy a Rails Application on this server. And my hello-world Rails App Server is bound to the server ip with a port. I choose 3000. After the setup of the firewall I expected to not be able to reach my Rails app anymore. But it is still there. What am I doing wrong?


OK. The solution is that my host provider also offers Plesk. And there is a firewall running which somehow overwrites everything i setup manually.

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