how to manually setup pptp vpn in linux?

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http://serverfault.com – I tried to setup the pptp vpn in ubuntu i.e /etc/ppp/peers/myvpn Its contents are pty "pptp <host> --nolaunchpppd" name myusername remotename myvpn linkname myvpn ipparam myvpn usepeerdns require-mppe file /etc/ppp/options.pptp But using this settings i can establish the tunnel and I even get the private IP of the VPN network , but I cannot ssh into any machine or not even ping to any other machine except for itself. (HowTos)