The problem is solved
Credits go to best sister on the world, who didn't underestimate power of the Help 
3.2.7. IPv6 Not Supported
1. IPv6 is supported by default in Ubuntu and can sometimes cause problems.
2. To disable it, open a Terminal (Applications ▸ Accessories ▸ Terminal) and type the command: gksudo gedit /etc/modprobe.d/aliases.
3. Find the line alias net-pf-10 ipv6 and change it to read alias net-pf-10 off.
4. Reboot Ubuntu.
Greets from Ubuntu 