Comment on Using a Point-to-Point Tunnelling Protocol, Virtual Private Network (PPTP VPN) client on a Raspberry Pi by Валентин Пономаренко

I’m getting following error:

pi@raspberrypi ~ $ sudo pon epam updetach

Using interface ppp0
Connect: ppp0 /dev/pts/1
anon fatal[get_ip_address:pptp.c:437]: getaddrinfo(): No address associated with hostname
Modem hangup
Connection terminated.

What is wrong ?