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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.
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Enable the necessary VPN service as you need. If you intend to run a VPN server inside your
LAN, you should disable the VPN service of Vigor Router to allow VPN tunnel pass through,
as well as the appropriate NAT settings, such as DMZ or open port.
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This submenu only applies to PPP-related VPN connections, such as PPTP, L2TP, L2TP over
IPSec.
Dial-In PPP Authentication PAP Only Select this option to force the router to authenticate
PAP or CHAP
Dial-In PPP Encryption (MPPE Optional MPPE) This option represents that the MPPE
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dial-in users with the PAP protocol.
Selecting this option means the router will attempt to
authenticate dial-in users with the CHAP protocol first. If the
dial-in user does not support this protocol, it will fall back to
use the PAP protocol for authentication.
encryption method will be optionally employed in the router for
the remote dial-in user. If the remote dial-in user does not
support the MPPE encryption algorithm, the router will transmit
Vigor3100 Series User's Guide
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