Mar 10, 2020 · It stands for Virtual Private Network and it’s an encrypted connection between you and the website you’re trying to access. Many people use the word ‘tunnel’ when talking about a VPN. This “tunnel” is what we just mentioned – a pathway for data to circulate from your PC to the website.

Dec 20, 2018 What is a VPN? A Comprehensive Explanation for Dummies Mar 10, 2020 APNIC eLearning: IPSec Basics

Tunnel Mode – In Tunnel Mode, IPsec encrypts and/or authenticates the entire packet. After encryption, the packet is then encapsulated to form a new IP packet that has different header information. IPsec is configured to be used in Tunnel Mode while setting up secure site-to-site VPN tunnels. What Is Virtual Private Network or VPN?

Keep Site-to-Site VPN Tunnel Active for monitoring You can disable the isakmp keepalive on the tunnel interface, or you can also configure the vpn-idle-timeout and vpn-session-timeout to none on group-policy. This will make you tunnel always up even when there's no traffic passing through the tunnel. 5 Helpful

IPSec tunnel mode is the default mode. With tunnel mode, the entire original IP packet is protected by IPSec. This means IPSec wraps the original packet, encrypts it, adds a new IP header and sends it to the other side of the VPN tunnel (IPSec peer).