The UFW Allow and Deny Command. 1. UFW Allow Command. UFW will deny all incoming connections after you turn it on. So the first thing you should do is to allow SSH access for the server if you like to manage the system remotely. The command "ufw allow sshport" allow access by SSH, replace SSHPORT with the port of the SSH service, the default
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sudo ufw allow 993 sudo ufw allow 6969 sudo ufw allow out 53 sudo ufw allow out http sudo ufw allow out https sudo ufw allow out 465 sudo ufw allow out 587 sudo ufw allow out 993 sudo ufw allow out 6969. This works well with Ubuntu 16.04: Everything works properly. sudo ufw status numbered (the reasoning) [ 1] 993 ALLOW IN Anywhere (thunderbird)