PPTP and RAS use authentication and encryption methods to create a virtual private network. There are two common scenarios for this type of VPN: in the first, a remote user is dialing into an ISP with a PPTP-enabled remote access switch that connects to the RAS server; in the second, the user is connecting to an ISP that doesn’t offer PPTP

Schneier on Security: Analysis of Microsoft PPTP Version 2 encryption—implementation mistakes allow encrypted data to be recovered; encryption key—common passwords yield breakable keys, even for 128-bit encryption; control channel—unauthenticated messages let attackers crash PPTP servers; Details of the 1998 analysis are in our press release and FAQ. Schneier on Security: PPTP: Frequently Asked Questions PPTP allows all sorts of encryption and authentication schemes; Microsoft just invented some really lousy ones. Even better, if you are a VPN user, use IPSec. This is a much more robust protocol. 7. Are there alternatives? The main alternative is IPSec. It is an open standard, designed under the direction of the IETF. It has been developed What is the Difference Between PPTP vs. L2TP Protocols

PPTP. SSTP. SSTP is supported for Windows desktop editions only. SSTP cannot be configured using mobile device management (MDM), but it is one of the protocols attempted in the Automatic option. Automatic. The Automatic option means that the device will try each of the built-in tunneling protocols until one succeeds. It will attempt from most

Apr 17, 2018

I have a Cisco 877 ADSL router configured (at last!) to act as a VPN server; it supports both PPTP and L2TP VPNs, and I can successfully connect to it from Windows computers using the built-in VPN software. There is only one problem: when using a PPTP VPN, encryption doesn't work.

What is the Difference Between PPTP vs. L2TP Protocols Better Security. The L2TP protocol is more secure than PPTP as it doesn’t have any major security vulnerabilities. It uses the IPSec suite to provide end-to-end encryption, data origin authentication, replay protection, as well as data integrity.. Since L2TP doesn’t have any encryption or authentication capabilities (both are key features of VPNs) on its own, IPSec VPN is often paired with it. Cisco 877 VPN: PPTP encryption not working - Server Fault