Install ProXPN native client on Linux

Native Client

- Download the native ProXPN Client and install it:

For 32bit

wget http://www.proxpn.com/updater/proxpn_4.5.0.2_i386.deb && sudo dpkg -i proxpn_4.5.0.2_i386.deb

For 64 bit

wget http://www.proxpn.com/updater/proxpn_4.5.0.2_amd64.deb && sudo dpkg -i proxpn_4.5.0.2_amd64.deb

- Install Qt platform dependencies:

cd /opt/proxpn && sudo ./install_dep.sh

- Run proXPN:

/opt/proxpn/proXPN&

Bugfixes

If you experience the problem with the systray popup, try to install the libpng12, Gtk2::AppIndicator, libappindicator-dev packages with following command:

sudo apt install libappindicator-dev 

followed by

sudo cpan -i Gtk2::AppIndicator 

In Ubuntu Versions prior to 18.04 you can download the libpng12 package as follows:

sudo apt install libpng12 

Ubuntu 18.04 does not contain the libpng12 package, so you can download it from here.
and then type in the command line

sudo dpkg -i libpng12-0.deb 

followed by

apt-get install -f