Ok I got Ubuntu up and running.

Ok typed in Sudo ufw enable. What will happen if I type the second thing default deny

 

All incoming (unsolicited request) will be denied.

There's a GUI front end for ufw in the repo's, Gufw.

 

Will I still be allowed internet access and Linux updates?

 

Yes, you will.

 

Ok done.

 

Downloaded GUFW but can't find it.

 

Administration > Firewall configuration

or

Terminal > gufw

 

Thanks.