CCIE Security - VPN GRE VPN over IPSEC

GRE over IPsec combines the simplicity of GRE tunneling with the robust security of IPsec. GRE encapsulates diverse network protocols within IP packets, enabling transport over any IP network.

IPsec then encrypts this GRE traffic, providing confidentiality, authentication, and integrity. This combination allows for secure tunneling of various protocols, including non-IP ones, over untrusted networks. GRE over IPsec is commonly used for secure site-to-site VPNs, protecting diverse traffic types between networks.

You might also be interested in these labs:

• CCIE Security - VPN GRE-Based VPN
• CCIE Security - VPN IKEv2 Lan-2-Lan or Site-2-site VPN
• CCIE Security - VPN GRE VPN over IPSEC
• CCIE Security - VPN GETVPN
• CCIE Security - VPN FLEX VPN L2TPv3
• CCIE Security - VPN DMVPN Dual Hub
• CCIE Security - VPN Certificate DMVPN
• CCIE Security - VPN Certificate Based Site-2-Sites VPN
• CCIE Security - VPN ASA Site2site through ASA and router IKEV and Anyconnect VPN with multiple profiles

The default username and password for images used in this course is as follows, however you will hear new passwords during the course if the instructor changes the credentials: 

** For Cisco XRv you are asked for a username and password in the loading process. You can add any username and password other than admin, root, sysadmin and other reserved usernames. Go with something like Alex/cisco e.g.

Then when completely loaded, you can use cisco/cisco or admin/admin.

***For XRv9K Full image you are asked for a username and password in the loading process. You then login using the username and password that you set.