VPN (Virtual Private Network) is a technology that provides secure communication through an insecure and untrusted network (like the Internet). Usually, it achieves this by authentication, encryption, ...

Virtual private networks, or VPNs, are useful and convenient things. Road warriors use them to connect to their home networks securely while traveling; geographically dispersed organizations use them ...

Previous articles (Part one, Part two) in this series on implementing VPN gateways using Cisco routers discussed the IPsec protocol and basic IPsec VPN connection models. Now we'll learn how to ...