Virtual Private Networks - Zero to Hero (VPN)

Explore virtual private networks from basics to real-world configuration, preparing you for CCNA Security and CCNP Security exams and enabling you to configure a remote access vpn.

Discover how IPsec exchanges secure VPNs, covering main mode phase one, policy negotiation, and keying material. Learn how PSK and PKI, MD5/SHA, and Diffie-Hellman ensure authentication and encryption.

Explore how the first ipsec tunnel is negotiated on udp 500, establishing security associations and policies, selecting encryption and hashing methods, and binding a crypto map to private networks.

Explore site-to-site ipsec vpn by building and testing tunnels between R1 and R3, configuring crypto maps, transforms, and acls, and understanding main mode, quick mode, and encapsulation.

Build and manage IPsec tunnels using access lists and crypto maps to secure site-to-site traffic. Explore tunnel encapsulation, keepalives, scalability challenges, and multicast limitations.

Demonstrates nat traversal for a VPN between R4 and R1, detailing ACL policies, NAT, UDP 4500 encapsulation, and static port bindings for tunnel establishment.

Learn how GRE over IPsec creates encrypted tunnels for private networks over the public internet, using SVTI and IPsec profiles to secure traffic.

Learn how Dmvpn phase 1 enables scalable multipoint tunnels with a hub-and-spoke topology, using Nhrp dynamic mapping and registration to resolve destinations.

Explain how dmvpn phase 1 uses hub-and-spoke tunnels with static neighbors and dynamic mappings, routing multicast hello traffic through the hub to spokes.

Explore dual-hub DMVPN design with active-active hubs to ensure spoke communication when a hub fails, maintain dynamic mappings and multicast to multiple hubs, and enable load-balanced path selection.

Explore DMVPN phase 3 dual-hub design that enables direct spoke-to-spoke communication through dynamic registrations, resolution requests, and redirect shortcuts, improving scalability and hub efficiency.

Master DMVPN day 8: implement phase 1 and 3 with OSPF in a dual-hub hub-and-spoke network, using multipoint tunnel types, point-to-point links, and redirects for spoke-to-spoke routing.

Get VPN in a multi-site private WAN, detailing how a key server manages IPsec tunnels, group member registration, session keys, and push-down policies to achieve scalable VPN with gdoi.

Learn how getvpn uses kek and tek with dual key servers, primary-secondary roles, and gdoi key exchange to secure tunnels, with unicast/multicast rekey and time-based anti-replay.

Explore how public key infrastructure and certificate authorities secure site-to-site and SSL VPN tunnels by issuing and signing identity certificates, enabling enrollment and trusted RSA-based keys.

Configure remote access vpn with ezvpn client, including group name, password, and address pools. Understand how dynamic crypto maps push policies, transform sets, and split-tunnel traffic for secure connectivity.

Discover how ezvpn router acts as a client, configuring ipsec, dynamic maps, and inside/outside interfaces. Learn network extension modes (including network extension plus) and extended authentication for flexible site connectivity.

Explore EzVPN enhanced with dynamic virtual tunnel interfaces and unnumbered IP addresses, enabling template-driven, scalable VPN deployments with reverse route injection and static routing.

Ikev2 site-to-site vpn fundamentals, including a streamlined four-packet exchange, nat-t handling, and create child essays, with traffic selector and authentication options.

Explore how ssl vpn encrypts traffic at layer seven using an ssl handshake, certificates, and port 443 to secure remote access, unlike IPsec’s layer three approach.

Explore ssl vpn gateway configuration, creating port forwards like R1 and R2, using a thin client and java to tunnel traffic through 127.0.0.1, within admin and sales contexts.

Configure SSL VPN on an ASA with AnyConnect thick client, enable web VPN on the outside, and enforce group policies and web-type ACLs for controlled http access and split tunneling.

Explore how to set up a site-to-site IPsec VPN on an ASA firewall, detailing interfaces, crypto maps, tunnel groups, and the differences from iOS-based routers.

Explore vrf aware vpn architectures in mpls networks by creating separate vrfs with distinct routing tables, route distinguishers, and interfaces, enabling isolated site a and site b traffic.

EzVPN on the ASA is explained through remote access vpn configuration using dynamic crypto maps, tunnel groups, and group policies, including split tunneling and network extension mode.

Explore configuring IKEv1 and IKEv2 on the ASA, including setting tunnel groups, IPsec L2/L, crypto ikev2/IPsec proposals, pre-shared keys, and matching policies, and applying crypto maps on the outside interface.

Master flex vpn site-to-site in a hub-and-spoke topology with spoke-to-spoke tunnels. Configure ikev2 ipsec, static tunnels, virtual templates, and resolution via redirects to enable direct communication between spokes.

Learn flex vpn fundamentals by configuring a flex vpn server and client, comparing with easy vpn, and understanding manual tunnel, routes, and ikev2 ipsec setups.

This lecture explains vpn high availability using standby groups and a virtual ip to keep the vpn active, with ipsec tunnels, pre-empt, and tracking to ensure seamless failover.

Explore how to prioritize and police vpn traffic through ipsec tunnels using class maps, policy maps, ip precedence, and group or crypto profiles, ensuring dedicated bandwidth and reliable delivery.