| 1994 | PPP Challenge Handshake Authentication Protocol (CHAP)W. Simpson | Draft Standard | August 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2385 | Protection of BGP Sessions via the TCP MD5 Signature OptionA. Heffernan · obsoleted by RFC 5925 | Proposed Standard | August 1998 |
| 2401 | Security Architecture for the Internet ProtocolS. Kent, R. Atkinson · obsoleted by RFC 4301 | Proposed Standard | November 1998 |
| 2409 | The Internet Key Exchange (IKE)D. Harkins, D. Carrel · obsoleted by RFC 4306 | Historic | November 1998 |
| 2607 | Proxy Chaining and Policy Implementation in RoamingB. Aboba, J. Vollbrecht | Informational | June 1999 |
| 2661 | Layer Two Tunneling Protocol "L2TP"W. Townsley, A. Valencia, A. Rubens, G. Pall, G. Zorn, B. Palter | Proposed Standard | August 1999 |
| 3193 | Securing L2TP using IPsecB. Patel, B. Aboba, W. Dixon, G. Zorn, S. Booth | Proposed Standard | November 2001 |
| 3562 | Key Management Considerations for the TCP MD5 Signature OptionM. Leech | Informational | July 2003 |
| 3947 | Negotiation of NAT-Traversal in the IKET. Kivinen, B. Swander, A. Huttunen, V. Volpe | Proposed Standard | January 2005 |
| 3948 | UDP Encapsulation of IPsec ESP PacketsA. Huttunen, B. Swander, V. Volpe, L. DiBurro, M. Stenberg | Proposed Standard | January 2005 |
| 4016 | Protocol for Carrying Authentication and Network Access (PANA) Threat Analysis and Security RequirementsM. Parthasarathy | Informational | March 2005 |
| 4081 | Security Threats for Next Steps in Signaling (NSIS)H. Tschofenig, D. Kroeselberg | Informational | June 2005 |
| 4107 | Guidelines for Cryptographic Key ManagementS. Bellovin, R. Housley | Best Current Practice | June 2005 |
| 4111 | Security Framework for Provider-Provisioned Virtual Private Networks (PPVPNs)L. Fang, Ed. | Informational | July 2005 |
| 4213 | Basic Transition Mechanisms for IPv6 Hosts and RoutersE. Nordmark, R. Gilligan | Proposed Standard | October 2005 |
| 4225 | Mobile IP Version 6 Route Optimization Security Design BackgroundP. Nikander, J. Arkko, T. Aura, G. Montenegro, E. Nordmark | Informational | December 2005 |
| 4272 | BGP Security Vulnerabilities AnalysisS. Murphy | Informational | January 2006 |
| 4301 | Security Architecture for the Internet ProtocolS. Kent, K. Seo | Proposed Standard | December 2005 |
| 4302 | IP Authentication HeaderS. Kent | Proposed Standard | December 2005 |
| 4303 | IP Encapsulating Security Payload (ESP)S. Kent | Proposed Standard | December 2005 |
| 4306 | Internet Key Exchange (IKEv2) ProtocolC. Kaufman, Ed. · obsoleted by RFC 5996 | Proposed Standard | December 2005 |
| 4364 | BGP/MPLS IP Virtual Private Networks (VPNs)E. Rosen, Y. Rekhter | Proposed Standard | February 2006 |
| 4593 | Generic Threats to Routing ProtocolsA. Barbir, S. Murphy, Y. Yang | Informational | October 2006 |
| 4891 | Using IPsec to Secure IPv6-in-IPv4 TunnelsR. Graveman, M. Parthasarathy, P. Savola, H. Tschofenig | Informational | May 2007 |
| 4925 | Softwire Problem StatementX. Li, Ed., S. Dawkins, Ed., D. Ward, Ed., A. Durand, Ed. | Informational | July 2007 |
| 5216 | The EAP-TLS Authentication ProtocolD. Simon, B. Aboba, R. Hurst | Proposed Standard | March 2008 |
| 5406 | Guidelines for Specifying the Use of IPsec Version 2S. Bellovin | Best Current Practice | February 2009 |
| 5565 | Softwire Mesh FrameworkJ. Wu, Y. Cui, C. Metz, E. Rosen | Proposed Standard | June 2009 |
| 5566 | BGP IPsec Tunnel Encapsulation AttributeL. Berger, R. White, E. Rosen · obsoleted by RFC 9012 | Proposed Standard | June 2009 |
| 5571 | Softwire Hub and Spoke Deployment Framework with Layer Two Tunneling Protocol Version 2 (L2TPv2)B. Storer, C. Pignataro, Ed., M. Dos Santos, B. Stevant, Ed., L. Toutain, J. Tremblay | Proposed Standard | June 2009 |