This is a known regression in ESXi 5.5: The e1000 virtual NIC does not correctly handle GRE packets, which breaks PPTP. See the KB article: VMware KB: Point-to-Point Tunneling Protocol (PPTP) connections may not work on ESXi 5.5
We'll be correcting the issue in a future update. It should be possible to work around the issue by changing your vNIC from e1000 to something else (i.e. vmxnet3).
Thank you soooo much. This is exactly the answer I was looking for.
This worked! Thanks!
I had the same problem and has solved vmxnet3 the virtual network adapter of the PPTP server.
Leandro Ariel Leonhardt: Virtualized System Architect at GrupoSothis.com. VSAN vExpert 2016, vExpert 2017/16/15/14/13, VMware Certified Instructor, VCAP5-DCA, VCP6/5-DCV, VCA-DCV, Nutanix NPP/NSEN & Nutanix Technology Champions (NTC). | Founder of BlogVMware Blog: https://www.blogvmware.com & Nutanix Course http://vExpert.me/Z0 Si encuentras que esta o cualquier otra respuesta fue de utilidad, por favor da el voto. Gracias. If you find this or any other answer useful, please consider awarding points. Thank you.
Thank You! I was pulling my hair out. I was at the end of my troubleshooting rope. I changed the VM's adapter from E1000 to VMXNET 3 and voila, now I can connect to PPTP VPNs again. What a relief.
Thank you! I changed the NIC and now I can cannot to VPN pptp.