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Startside VPN Terms A virtual private dial-up network

A virtual private dial-up network

(also VPDN)

What is a virtual private dial-up network?

A virtual private dial-up network (VPDN) is a secure, virtual version of old dial-up connections, allowing employees to access their work network from anywhere, just like in the office.

See also: dynamic virtual private network, point-to-point protocol, remote access server, virtual private LAN service

How does a virtual private dial-up network work? 

  1. 1.A remote user uses their computer to dial into their internet service provider (ISP) using a modem, just like old-school internet connections.
  2. 2.Once connected to the ISP, the VPDN creates a secure tunnel over the internet to the company’s private network.
  3. 3.The user logs in with a username and password to verify their identity.
  4. 4.After logging in, the user can access the company’s private network, files, and applications as if they were in the office.

What are the main benefits of using a VPDN?

  • Employees can securely connect to the company network from anywhere. A VPDN allows employees to establish an encrypted connection to the company's private network  remotely.
  • It uses the existing internet — you won’t need extra equipment. Instead of requiring expensive dedicated physical lines, a VPDN utilizes the public internet to create a private connection. Without the need for costly hardware for each remote user, enabling remote workforce becomes inexpensive and easy to scale.
  • Keeps data safe while being transmitted. A core function of a VPDN is to create an encrypted "tunnel" for all data traveling between the user's device and the corporate network. This encryption scrambles the information, making it unreadable to anyone who might intercept it, thus protecting sensitive company data from eavesdropping and ensuring its integrity.
  • Works with different devices and platforms. Modern VPDN solutions are designed to be highly flexible and work across a wide variety of devices and operating systems. Employees can securely connect using company-issued or personal laptops, tablets, and smartphones, regardless of whether they run on Windows, macOS, Android, or iOS.
  • IT can easily manage and secure remote connections. VPDNs provide IT administrators with a single, centralized point of control for managing and securing all remote connections. From one console, they can enforce security policies, authenticate users, monitor network activity, and grant or revoke access rights. This simplifies the administrative burden of securing a distributed workforce and ensures consistent policy enforcement.

VPDN vs. VPN

A VPDN is a legacy subset of VPN (virtual private network) technology that specifically uses dial-up, PPP, and L2TP to connect remote users to a private network. A VPN (virtual private network) is the modern, broad term for secure encrypted connections over any network.In short, VPDN is a specialized, older form of VPN, while VPN is the broad term for modern, secure network connections.

Here are a few main differences between them:

  • Connection method. VPDN relies on dial-up modem pools and PSTN (Public Switched Telephone Network), while VPNs use high-speed broadband or mobile internet.
  • Protocols. A VPDN can use L2TP (Layer 2 Tunneling Protocol), PPTP, and L2F. VPNs use WireGuard or proprietary protocols, such as NordLynx.
  • Status. Rarely used today, a VPDN is considered a legacy technology. VPN is the modern, industry-standard replacement for remote access and site-to-site connectivity.