AuthIP

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title: "AuthIP" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["cryptographic-protocols", "windows-server"] topic_path: "technology/cryptography" source: "https://en.wikipedia.org/wiki/AuthIP" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

AuthIP is a Microsoft proprietary extension of the IKE cryptographic protocol. AuthIP is supported in Windows Vista and later on the client and Windows Server 2008 and later on the server. AuthIP adds a second authentication to the standard IKE authentication which, according to Microsoft, increases security and deployability of IPsec VPNs. AuthIP adds support for user-based authentication by using Kerberos v5 or SSL certificates.

AuthIP is not compatible with IKEv2, an IETF standard with similar characteristics; however Windows 7 and Windows Server 2008 R2 also support IKEv2.

References

References

  1. "Authenticated Internet Protocol (AuthIP) - Windows Server® 2008 TCP/IP Protocols and Services [Book]".
  2. "IKE and AuthIP IPsec Keying Modules - Black Viper {{!}} BlackViper.Com".
  3. "About IKEv2".
  4. Eronen, Pasi. (September 2010). "Internet Key Exchange Protocol Version 2 (IKEv2)". Internet Engineering Task Force.
  5. "Windows Server 2008 Remote Access and Network Access Protection {{!}} Microsoft Press Store".

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