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An IPSec VPN is a kind of private network that uses Internet Protocol Security to keep data safe when it is sent over the internet. It does this by making sure the information in the packets is secret and cannot be changed. This creates a path for devices or networks to talk to each other. When we use an IPSec VPN connection our data is wrapped up locked and sent safely through doors called VPN gateways. IPSec VPN uses rules like AH and ESP to make sure our data is not changed kept secret and that it really comes from who it says it does. IPSec VPN can work in two ways: it can. Make a special tunnel for all the data or it can just protect the important information. This makes IPSec VPN very good for keeping information safe when different offices or people working from home need to access the network. IPSec VPN is really useful, for IPSec VPN connections that need to be safe and secure.