VPN Section

VPN connections are popular because they offer easy Branch/HQ connectivity. Also VPN Remote Access is a critical part of a company network infrastructure enabling users to virtually dial-in from anywhere and get access to the information they need in order to successfully complete their work duties.

Choosing the right VPN solution is very important and requires a good understanding of various VPN protocols.

 Articles

 23.08.2011
Vyatta Core 6.3 - Advanced VPN Site-to-Site Connections - Part 13 - Configure GRE/IPsec Between a Vyatta Router and a Cisco Router running Cisco IOS Using IPsec ESP in Transport Mode

 28.04.2011
Configure Vyatta(Core 6.2) as an L2TP/IPsec server with certificate authentication for IKE Main Mode using for the PKI part XCA

 27.04.2011
Using XCA to configure the PKI part needed for L2TP/IPsec VPN connections using certificates for IKE main mode authentification

 04.04.2011
Using XCA to configure the OpenVPN PKI part as an alternative to OpenVPN's easy-rsa

 05.08.2009
Vyatta VC5 - Apply NAT Policies over IPsec Tunnel Mode Site-to-Site VPN Traffic: Part 2 - Overlapped Subnets

 24.07.2009
Vyatta VC5 - Apply NAT Policies over IPsec Tunnel Mode Site-to-Site VPN Traffic: Part 1 - A Simple Scenario

 22.07.2009
Configure an IPsec Tunnel Mode Site-to-Site VPN Between a Vyatta VC5 and a Cisco Router

 15.03.2009
Vyatta VC5 - Advanced VPN Site-to-Site Connections - Part 13 - Configure GRE/IPsec Between a Vyatta Router and a Cisco Router Using IPsec ESP in Tunnel Mode and as GRE Tunnel Endpoints Private IP Addresses from the Loopback Interfaces

 03.02.2009
Configure an IPsec Tunnel Mode Site-to-Site VPN between an ISA Server 2006 SP1 SE and a Check Point NGX R65 VPN-1

 29.12.2008
ISA 2006 Firewall as a VPN Remote Access Server - A Few Tricks

 01.11.2008
Creating a Site-to-Site VPN Between Two ISA Server 2006 SE Over a Dedicated Connection - Part 1: Using IPsec Tunnel Mode

 17.08.2008
VPN-Q 2006 Enterprise Edition, A Remote Access VPN Quarantine Solution For ISA Server 2006

 05.08.2008
ISA Server 2006 as an L2TP/IPsec VPN server and Mac OS X 10.4.x as L2TP/IPsec VPN clients - Part 3: IKE Authentication with Certificates - The Quick and Dirty Way: Using an OpenSSL CA

 24.06.2008
ISA Server 2006 as an L2TP/IPsec VPN server and Mac OS X 10.4.x as L2TP/IPsec VPN clients - Part 2: IKE Authentication with Pre-shared Keys

 24.06.2008
ISA Server 2006 as an L2TP/IPsec VPN server and Mac OS X 10.4.x as L2TP/IPsec VPN clients - Part 1: IKE Authentication with Certificates - Using an Internal Windows 2003 Enterprise CA

 13.05.2008
Vyatta OFR Remote Access VPN - Part 1: PPTP

 24.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Appendix - The List of Configuration Files

 24.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 12 - Configure IPIP/IPsec in Case of Scenario 2 Using IPsec ESP in Tunnel Mode and as IPIP Tunnel Endpoints Private IP Addresses from the Loopback Interfaces

 24.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 11 - Configure GRE/IPsec in Case of Scenario 2 Using IPsec ESP in Tunnel Mode and as GRE Tunnel Endpoints Private IP Addresses from the Loopback Interfaces

 22.04.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 10 - Configure the GRE and IPIP Tunnels in Case of Scenario 2

 22.04.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 9 - Basic Configuration of the Vyatta VC4 VMs(configure interfaces, set default routes, NAT rules, test connectivity) in Case of Scenario 2

 13.04.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 8 - Configure IPIP/IPsec in Case of Scenario 1 Using IPsec ESP in Tunnel Mode and as IPIP Tunnel Endpoints Private IP Addresses from the Loopback Interfaces

 12.04.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 7 - Configure GRE/IPsec in Case of Scenario 1 Using IPsec ESP in Tunnel Mode and as GRE Tunnel Endpoints Private IP Addresses from the Loopback Interfaces

 09.04.2008
ISA Server 2006 - IPsec Tunnel Mode Site-to-Site VPN Connections: A Couple of Things That Are Not Supported

 07.04.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 6 - Configure the GRE and IPIP Tunnels in Case of Scenario 1

 07.04.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 5 - Basic Configuration of the Vyatta VC4 VMs(configure interfaces, set default routes, NAT rules, test connectivity) in Case of Scenario 1

 05.04.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 4 - Building the VMware Labs

 03.04.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 3 - A look at the Diagrams of the GRE and IPIP over IPsec VMware Labs

 31.03.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 2 - A Quick Overview in Pictures of Various Implementations from Different Vendors: GRE/IPsec, IPIP/IPsec, L2TP/IPsec, Cisco's SVTI and DMVPN

 31.03.2008
 Updated 23.04.2008
Vyatta VC4 - Advanced VPN Site-to-Site Connections - Part 1 - A Quick Overview

 09.03.2008
L2TP/IPsec in Pictures - ISA Server 2006 - Part 2 - VPN Technologies and VPN Solutions

 24.02.2008
L2TP/IPsec in Pictures - ISA Server 2006 - Part 1 - Introduction

 01.01.2008
How to Create a VPN site-to-site IPsec Tunnel Mode Connection Between an ISA 2006 Firewall and a Cisco Router

 21.12.2007
Vyatta OFR supports multiple VPN Clients(either L2TP/IPsec and/or PPTP) located behind it(when NAT-ing)

 21.12.2007
How to Create a VPN Site-to-Site IPsec Tunnel Mode Connection Between a Vyatta OFR and an ISA 2006 Firewall Standard Edition

 20.11.2007
OpenVPN and ISA 2006 - Part 3: OpenVPN on ISA - How to create a site-to-site VPN connection with a pfSense Firewall

 31.08.2007
Creating a site-to-site VPN Hub and Spoke architecture with ISA 2006 Firewall Standard Edition

 30.08.2007
Creating a site-to-site VPN partial mesh architecture with ISA 2006 Firewall Standard Edition

 10.08.2007
 Updated 21.08.2007
OpenVPN and ISA 2006 - Part 2 - OpenVPN on ISA

 10.08.2007
 Updated 21.08.2007
OpenVPN and ISA 2006 - Part 1 - OpenVPN on a DMZ