| 1661 | The Point-to-Point Protocol (PPP)W. Simpson, Ed. | Internet Standard | July 1994 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2548 | Microsoft Vendor-specific RADIUS AttributesG. Zorn | Informational | March 1999 |
| 2560 | X.509 Internet Public Key Infrastructure Online Certificate Status Protocol - OCSPM. Myers, R. Ankney, A. Malpani, S. Galperin, C. Adams · obsoleted by RFC 6960 | Proposed Standard | June 1999 |
| 2637 | Point-to-Point Tunneling Protocol (PPTP)K. Hamzeh, G. Pall, W. Verthein, J. Taarud, W. Little, G. Zorn | Informational | July 1999 |
| 2661 | Layer Two Tunneling Protocol "L2TP"W. Townsley, A. Valencia, A. Rubens, G. Pall, G. Zorn, B. Palter | Proposed Standard | August 1999 |
| 2716 | PPP EAP TLS Authentication ProtocolB. Aboba, D. Simon · obsoleted by RFC 5216 | Experimental | October 1999 |
| 2818 | HTTP Over TLSE. Rescorla · obsoleted by RFC 9110 | Informational | May 2000 |
| 3268 | Advanced Encryption Standard (AES) Ciphersuites for Transport Layer Security (TLS)P. Chown · obsoleted by RFC 5246 | Proposed Standard | July 2002 |
| 3280 | Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileR. Housley, W. Polk, W. Ford, D. Solo · obsoleted by RFC 5280 | Proposed Standard | May 2002 |
| 3748 | Extensible Authentication Protocol (EAP)B. Aboba, L. Blunk, J. Vollbrecht, J. Carlson, H. Levkowetz, Ed. | Proposed Standard | June 2004 |
| 3766 | Determining Strengths For Public Keys Used For Exchanging Symmetric KeysH. Orman, P. Hoffman | Best Current Practice | April 2004 |
| 4017 | Extensible Authentication Protocol (EAP) Method Requirements for Wireless LANsD. Stanley, J. Walker, B. Aboba | Informational | March 2005 |
| 4282 | The Network Access IdentifierB. Aboba, M. Beadles, J. Arkko, P. Eronen · obsoleted by RFC 7542 | Proposed Standard | December 2005 |
| 4284 | Identity Selection Hints for the Extensible Authentication Protocol (EAP)F. Adrangi, V. Lortz, F. Bari, P. Eronen | Informational | January 2006 |
| 4346 | The Transport Layer Security (TLS) Protocol Version 1.1T. Dierks, E. Rescorla · obsoleted by RFC 5246 | Historic | April 2006 |
| 4366 | Transport Layer Security (TLS) ExtensionsS. Blake-Wilson, M. Nystrom, D. Hopwood, J. Mikkelsen, T. Wright · obsoleted by RFC 5246, RFC 6066 | Proposed Standard | April 2006 |