NimChimpsky's questions

I have read the basic instructions here:

https://help.ubuntu.com/community/UFW

I want to sudo ufw default deny and then

sudo ufw allow ssh
sudo ufw allow smtp
sudo ufw allow www
sudo ufw allow https
sudo ufw allow imaps

to allow the services I need, am I missing anything ? I assume allowing ssh will also allow scp ? (heck I will allow sftp as well anyway).

However my problem is I am connecting remotely, so the only way I can do what I want is to actually do a sudo ufw default allow then use a list of the services provided by less /etc/services and deny each service individually? This seems a pain as if I turn on the firewall with default deny it will boot me out of my ssh connection?

I have set up postfix and am now attempting to set up dovecot. I did apt-get install dovecot-common I have changed dovcot.conf to include the following

protocols = imap imaps

And I now get this error when restarting dovcot

Error: mail_executable: Can't use /usr/lib/dovecot/imap: No such file or directory Fatal: Invalid configuration in /etc/dovecot/dovecot.conf

Did I install the wrong package, is there another package I need, or am I missing something else ?

Thanks.

I have a ubuntu system that refuses to boot. I cant seem to fix it.

The system is on a USB stick and I need to access the home directory on it, but it is encrypted.