- offers a relatively secured connection because the public switched telephone network is more secured than the Internet. Note that dial-up connections do not offer encryption mechanisms.
- internet connections are not required because dial-up connections use phone lines. This means that no authentications requests are sent to your server exposing it to the Internet
- constant speed
- although dial-up connections offer a constant speed, the performance is often bad. The maximum bandwidth of such connections is 56 Kbps
- because each remote user requires a dedicated phone line and modem, scaling a dial-up infrastructure is hard and expensive
- because VPN connections use the public Internet, lower costs are required to implement this technology.
- offers higher bandwidth than dial-up connections
- VPN connection can sometimes suffer from latency because of the Internet connection
- Internet connection is required on both sides (server and remote user). This poses a certain risk level because the internal network is exposed to external authentication requests.
L2TP or Layer Two Tunneling Protocol – offers connectivity between non-Microsoft and Microsoft products. Provides user authentication using the PPP protocol and computer authentication using IPSec. It can also enhance security providing integrity, authentication and encryption protocols. This VPN technology is also compatible with IPv6 connections.
PPTP or Point-to-Point Tunneling Protocol – Microsoft’s proprietary VPN protocol that uses PPP (Point-to-Point Protocol) for user authentication and MPPE (Microsoft Point-to-Point Encryption) for encryption.
SSTP or Secure Socket Tunneling Protocol – this VPN technology uses the PPP protocol for user authentication and SSL (Secure Sockets Layer) for data integrity, encryption and authentication. SSTP can be implemented using AD Certificate Services and requires that VPN clients trust the CA that issued the certificate installed on the VPN server.
This was a short introduction in VPN connections, in the next article we will see how to install and configure a VPN server. I hope you’ll find this article interesting, don’t forget to rate & share. For any misunderstandings leave a comment. Enjoy your day and stay tuned for the following articles.