# What is IPsec VPN?

Understand IPsec’s role in protecting IP traffic, how IKEv2 fits, and what to check before using an IPsec configuration.

Website: https://zenshield.com/glossary/ipsec

Canonical URL: https://zenshield.com/glossary/ipsec

Page reviewed: 2026-09-12

IPsec is a suite of protocols and policies for protecting traffic at the IP layer. A VPN can use IPsec to authenticate and protect traffic between its endpoints.

## How IKEv2 fits

IKEv2 is a key-management protocol commonly used to establish security associations for IPsec. It handles negotiation rather than being a synonym for every part of the traffic-protection system.

A settings screen may label a connection IKEv2, IPsec or a combined name. Use the configuration instructions for the service providing that connection. Similar names do not make unrelated server addresses, credentials and certificates interchangeable.

## Consumer and workplace connections

An organisation can configure IPsec for access to its own network. A consumer VPN may use it to carry traffic through the provider’s internet exit. The protocol name alone does not tell you which resources become accessible.

For a workplace connection, obtain the configuration through your administrator’s approved channel. Do not import an unknown profile because it uses a familiar protocol name.

## Troubleshoot the arrangement you have

Note the operating system, app, network and exact error. A negotiation failure is different from a connected tunnel that cannot reach an internal site. Keep those observations separate when requesting help.

[VPN protocol selection](https://zenshield.com/learn/vpn-protocols) explains how to compare supported choices. This definition is not a claim that Zenshield offers an IPsec configuration or accepts third-party profiles. Follow the options documented for the current app.

## Sources
- https://www.rfc-editor.org/rfc/rfc4301
- https://www.rfc-editor.org/rfc/rfc7296