PPTP、L2TP/IPSec、OpenVPN比较选择 | IT瘾
PPTP. To allow PPTP tunnel maintenance traffic, open TCP 1723. To allow PPTP tunneled data to pass through router, open Protocol ID 47. L2TP over IPSec. To allow Internet Key Exchange (IKE), open UDP 500. To allow IPSec Network Address Translation (NAT-T) open UDP 5500. To allow L2TP … Difference Between OpenVPN and PPTP | Compare the Dec 01, 2014 PPTP vs. L2TP vs. OpenVPN - VPS9 BLOG
The Basics: PPTP vs. L2TP vs. OpenVPN vs. SSTP. The most commonly used VPN protocols are: PPTP, L2TP/IPsec and OpenVPN. Some VPN providers offer another VPN protocol called SSTP. Also, a number of VPN providers offers their customized version of VPN protocols. PPTP: PPTP is a basic VPN protocol and very easy to set up and use.
Point-to-Point Tunneling Protocol - Wikipedia The Point-to-Point Tunneling Protocol (PPTP) is an obsolete method for implementing virtual private networks.PPTP has many well known security issues. PPTP uses a TCP control channel and a Generic Routing Encapsulation tunnel to encapsulate PPP packets. Many modern VPNs use various forms of UDP for this same functionality.. The PPTP specification does not describe encryption or authentication
Jun 30, 2020
PPP, IPSec and PPTP guide - Point to Point tunneling Protocol PPTP can only secure one IP address with one other IP address or with a network. PPTP is now often replaced by L2TP which provides security using IPSec, and PPTP has also been made obsolete by L2TP and IPSec. Lastly another limitation PPTP has compared to L2TP is that it can not route over other networks other than IP.