I'm trying to use PPTP on my Slackware machine, the corresponding instruction was taken from - https://vexxhost.com/resources/tutorials/how-to-setup-your-own-vpn-with-pptp-on-linux-centos-ubuntu-debian/
Here's /etc/peers/khan002
pty "pptp VPN.VPN.VPN.VPN --nolaunchpppd"
name a
password a...