====== Mail server ======
  * idea: potfix+virtualmailsql+mysqladmin+courier
  * zasrana tiskarna : http://www.tejasbarot.com/2011/12/10/howto-installing-hp-laserjet-m1005-mfp-printer-on-linux-centos-fedora-rhel-ubuntu/#axzz3zPcACror
  * reverzni tunel pro ssh na nePublic IP:  https://superuser.com/questions/767524/why-can-i-not-connect-to-a-reverse-ssh-tunnel-port-remotely-even-with-gatewaypo

  * http://www.poda.cz/index.php/cz/firmy/internet/produktova-rada-office
  * http://www.upc.cz/pdf/Cenik.pdf