You should require the ISP open TCP port 1723 and IP GRE protocol while your system running the PPTP.
In the case of IPSec, open UDP 500 and IP ESP(50) & AHP(51) protocol.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.