The [guide][1] recommends the Gufw firewall GUI. 
I installed it by `apt`

    gufw/oldstable,oldstable,now 12.10.0-1 all [installed]
      graphical user interface for ufw

Typing ẁindow key + gufw, I cannot see the application. 
Only access is through terminal by `gufw` which is not enough. 
I am thinking why so + how to fix the issue because I am systematically using too little firewall in Linux. 

Installation and testing the packages installed

1. Studying the package `masi@masi:$ apt search gufw`

        Sorting... Done
        Full Text Search... Done
        gufw/oldstable,oldstable,now 12.10.0-1 all [installed]
          graphical user interface for ufw

2. Installation by method `apt install gufw`

3. Output of `apt show -a gufw` where I am thinking about two packages (17.04 and 12.10) so something conflicting in my system - for some reason `gufw` in terminal starts gufw 12.10

        Package: gufw
	    Source: gui-ufw
	    Version: 17.04.1-1.1
	    Installed-Size: 3,376 kB
	    Maintainer: Python Applications Packaging Team <[email protected]>
	    Depends: python3:any (>= 3.3.2-2~), ufw (>= 0.34~rc), gir1.2-gtk-3.0, policykit-1, gir1.2-webkit2-4.0, python3-gi, net-tools
	    Homepage: http://gufw.org/
	    Tag: admin::configuring, implemented-in::python, interface::graphical,
	     interface::x11, network::firewall, role::program, scope::utility,
	     security::firewall, uitoolkit::gtk, use::configuring, x11::application
	    Section: admin
	    Priority: optional
	    Download-Size: 842 kB
	    APT-Sources: http://ftp.fr.debian.org/debian/ unstable/main amd64 Packages
	    
	    Package: gufw
	    Source: gui-ufw
	    Version: 12.10.0-1
	    Installed-Size: 1,328 kB
	    Maintainer: Devid Antonio Filoni <[email protected]>
	    Depends: python (>= 2.6.6-7~), ufw (>= 0.31.1), gir1.2-gtk-3.0, gir1.2-polkit-1.0, notify-osd | notification-daemon, policykit-1, python-dbus, python-gobject, gnome-icon-theme-symbolic
	    Homepage: https://launchpad.net/gui-ufw
	    Tag: admin::configuring, implemented-in::python, interface::x11,
	     network::firewall, role::program, scope::utility, security::firewall,
	     uitoolkit::gtk, use::configuring, x11::application
	    Section: admin
	    Priority: optional
	    Download-Size: 261 kB
	    APT-Manual-Installed: yes
	    APT-Sources: http://ftp.fi.debian.org/debian/ jessie/main amd64 Packages

4. Output of `apt-cache policy gufw`

        gufw:
          Installed: 12.10.0-1
          Candidate: 12.10.0-1
          Version table:
              17.04.1-1.1 0
                200 http://ftp.fr.debian.org/debian/ unstable/main amd64 Packages
          *** 12.10.0-1 0
                500 http://ftp.fi.debian.org/debian/ jessie/main amd64 Packages
                500 http://httpredir.debian.org/debian/ jessie/main amd64 Packages
                100 /var/lib/dpkg/status

5. Output of `dpkg -l gufw`

         Desired=Unknown/Install/Remove/Purge/Hold
         | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
         |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
         ||/ Name                            Version              Architecture         Description
          +++-===============================-====================-====================-====================================================================
         ii  gufw                            12.10.0-1            all                  graphical user interface for ufw



OS: Debian 8.7    
Related bug: [gufw: desktop entry doesn't show up in desktop environments][2]


  [1]: https://spreadprivacy.com/linux-privacy-tips-1dc956657357
  [2]: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=681315