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How does firewall affect VPN connection?

Updated on: 2017-12-11 15:21:10 UTC

Introduction

Our VPN immediately protects your internet privacy and security while giving you full internet freedom and instant access to content streaming.

How does firewall affect VPN connection

A firewall employs packet filtering to allow or disallow the flow of very specific types of network traffic. IP packet filtering provides a way for you to define precisely what IP traffic is allowed to cross the firewall. IP packet filtering is important when you connect private intranets to public networks like the Internet.

VPN Server and Firewall Configurations

There are two approaches to using a firewall with a VPN server:

  1. The VPN server is attached to the Internet and the firewall is between the VPN server and the intranet.
  2. The firewall is attached to the Internet and the VPN server is between the firewall and the intranet.

Typically 1723 and 443 TCP ports should be open, also your firewall/router/ISP must allow VPN/PPTP pass-through for PPTP VPN.

Typical working: embedded Microsoft firewall in Windows, Linksys/D-Link/TP-Link/ASUA Router manufactured after year 2007, ADSL broadband.

Typical not-working: not-Microsoft firewall, Netgear/Trend Router, all router-integrated ADSL modem. If you get error 619 with ADSL connection, please remove home router and disable not-Microsoft firewall software.

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