In iOS 10 and Mac OS Sierra Apple removed support for PPTP VPNs from their major OSes and technically had the right for it since PPTP is not secure and outdated. But in case you still have the need to connect to a VPN that works only via PPTP and you're rocking Mac OS Sierra or later you're out of luck. Unless you try using Shimo or Flow VPN which both for me didn't work at all, you're really out of luck 🙂
Thankfully guys at Apple removed only the GUI part of the PPTP client, and you still can use the pppd daemon throught Terminal. But before that you'll have to create a configuration first:
sudo nano /etc/ppp/peers/vpn.example.com
Next, fill it with this info, replacing vpn info with yours:
plugin PPTP.ppp
noauth
# logfile /tmp/ppp.log
remoteaddress "vpn.example.com"
user "username"
password "password"
redialcount 1
redialtimer 5
idle 1800
# mru 1368
# mtu 1368
receive-all
novj 0:0
ipcp-accept-local
ipcp-accept-remote
# noauth
refuse-eap
refuse-pap
refuse-chap
refuse-chap-md5
refuse-mschap
hide-password
mppe-stateless
mppe-128
# require-mppe-128
looplocal
nodetach
# ms-dns 8.8.8.8
usepeerdns
# ipparam gwvpn
defaultroute
debug
Save the file and then start your connection via:
sudo pppd call vpn.example.com
To stop the deamon, close the Terminal with the PPTP session, open a new one and enter:
sudo killall pppd