Draytek Vigor2136 Series User Manual page 213

II-4 VPN
A Virtual Private Network (VPN) is the extension of a private network that encompasses links across
shared or public networks like the Internet. In short, by VPN technology, you can send data between
two computers across a shared or public network in a manner that emulates the properties of a
point-to-point private link.
Here are some uses of VPNs:
Communication between home office and customer.

Secure connection between Teleworker, staff on business trip and main office.

Exchange data between remote office and main office.

POS between chain store and headquarters.

Circumvention of Internet censorship that filters websites or contents.

Circumvention of geolocation techniques employed by service providers or vendors to block

or restrict services to users.
Secure communications over public access points
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II-4-1 General Setup
This section offers general settings for the VPN server with different types (e.g., IPsec, WireGuard
and OpenVPN).
II-4-1-1 IPsec
This is a network protocol that encrypts traffic between two network locations. Windows, by means
of Windows Firewall, natively supports IPsec tunnels between endpoints with static IP addresses.
For computers with dynamically-assigned IP addresses, DrayTek provides the SmartVPN client.
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