| 793 | Transmission Control ProtocolJ. Postel · obsoleted by RFC 9293 | Internet Standard | September 1981 |
| 1191 | Path MTU discoveryJ. Mogul, S. Deering | Draft Standard | November 1990 |
| 1321 | The MD5 Message-Digest AlgorithmR. Rivest | Informational | April 1992 |
| 1435 | IESG Advice from Experience with Path MTU DiscoveryS. Knowles | Informational | March 1993 |
| 1981 | Path MTU Discovery for IP version 6J. McCann, S. Deering, J. Mogul · obsoleted by RFC 8201 | Draft Standard | August 1996 |
| 1994 | PPP Challenge Handshake Authentication Protocol (CHAP)W. Simpson | Draft Standard | August 1996 |
| 2104 | HMAC: Keyed-Hashing for Message AuthenticationH. Krawczyk, M. Bellare, R. Canetti | Informational | February 1997 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2131 | Dynamic Host Configuration ProtocolR. Droms | Draft Standard | March 1997 |
| 2230 | Key Exchange Delegation Record for the DNSR. Atkinson | Informational | November 1997 |
| 2373 | IP Version 6 Addressing ArchitectureR. Hinden, S. Deering · obsoleted by RFC 3513 | Proposed Standard | July 1998 |
| 2401 | Security Architecture for the Internet ProtocolS. Kent, R. Atkinson · obsoleted by RFC 4301 | Proposed Standard | November 1998 |
| 2402 | IP Authentication HeaderS. Kent, R. Atkinson · obsoleted by RFC 4302, RFC 4305 | Proposed Standard | November 1998 |
| 2403 | The Use of HMAC-MD5-96 within ESP and AHC. Madson, R. Glenn | Proposed Standard | November 1998 |
| 2404 | The Use of HMAC-SHA-1-96 within ESP and AHC. Madson, R. Glenn | Proposed Standard | November 1998 |
| 2405 | The ESP DES-CBC Cipher Algorithm With Explicit IVC. Madson, N. Doraswamy | Proposed Standard | November 1998 |
| 2406 | IP Encapsulating Security Payload (ESP)S. Kent, R. Atkinson · obsoleted by RFC 4303, RFC 4305 | Proposed Standard | November 1998 |
| 2407 | The Internet IP Security Domain of Interpretation for ISAKMPD. Piper · obsoleted by RFC 4306 | Historic | November 1998 |
| 2408 | Internet Security Association and Key Management Protocol (ISAKMP)D. Maughan, M. Schertler, M. Schneider, J. Turner · obsoleted by RFC 4306 | Historic | November 1998 |
| 2409 | The Internet Key Exchange (IKE)D. Harkins, D. Carrel · obsoleted by RFC 4306 | Historic | November 1998 |
| 2412 | The OAKLEY Key Determination ProtocolH. Orman | Informational | November 1998 |
| 2434 | Guidelines for Writing an IANA Considerations Section in RFCsT. Narten, H. Alvestrand · obsoleted by RFC 5226 | Best Current Practice | October 1998 |
| 2451 | The ESP CBC-Mode Cipher AlgorithmsR. Pereira, R. Adams | Proposed Standard | November 1998 |
| 2535 | Domain Name System Security ExtensionsD. Eastlake 3rd · obsoleted by RFC 4033, RFC 4034, RFC 4035 | Proposed Standard | March 1999 |
| 2608 | Service Location Protocol, Version 2E. Guttman, C. Perkins, J. Veizades, M. Day | Proposed Standard | June 1999 |
| 2782 | A DNS RR for specifying the location of services (DNS SRV)A. Gulbrandsen, P. Vixie, L. Esibov | Proposed Standard | February 2000 |
| 2845 | Secret Key Transaction Authentication for DNS (TSIG)P. Vixie, O. Gudmundsson, D. Eastlake 3rd, B. Wellington · obsoleted by RFC 8945 | Proposed Standard | May 2000 |
| 2865 | Remote Authentication Dial In User Service (RADIUS)C. Rigney, S. Willens, A. Rubens, W. Simpson | Draft Standard | June 2000 |
| 2923 | TCP Problems with Path MTU DiscoveryK. Lahey | Informational | September 2000 |
| 2931 | DNS Request and Transaction Signatures ( SIG(0)s )D. Eastlake 3rd | Proposed Standard | September 2000 |
| 2945 | The SRP Authentication and Key Exchange SystemT. Wu | Proposed Standard | September 2000 |
| 2983 | Differentiated Services and TunnelsD. Black | Informational | October 2000 |
| 3007 | Secure Domain Name System (DNS) Dynamic UpdateB. Wellington | Proposed Standard | November 2000 |
| 3315 | Dynamic Host Configuration Protocol for IPv6 (DHCPv6)R. Droms, Ed., J. Bound, B. Volz, T. Lemon, C. Perkins, M. Carney · obsoleted by RFC 8415 | Proposed Standard | July 2003 |
| 3347 | Small Computer Systems Interface protocol over the Internet (iSCSI) Requirements and Design ConsiderationsM. Krueger, R. Haagens | Proposed Standard | July 2002 |
| 3456 | Dynamic Host Configuration Protocol (DHCPv4) Configuration of IPsec Tunnel ModeB. Patel, B. Aboba, S. Kelly, V. Gupta | Proposed Standard | January 2003 |
| 3526 | More Modular Exponential (MODP) Diffie-Hellman groups for Internet Key Exchange (IKE)T. Kivinen, M. Kojo | Proposed Standard | May 2003 |
| 3566 | The AES-XCBC-MAC-96 Algorithm and Its Use With IPsecS. Frankel, H. Herbert | Proposed Standard | September 2003 |
| 3643 | Fibre Channel (FC) Frame EncapsulationR. Weber, M. Rajagopal, F. Travostino, M. O'Donnell, C. Monia, M. Merhar | Proposed Standard | December 2003 |
| 3686 | Using Advanced Encryption Standard (AES) Counter Mode With IPsec Encapsulating Security Payload (ESP)R. Housley | Proposed Standard | January 2004 |
| 3715 | IPsec-Network Address Translation (NAT) Compatibility RequirementsB. Aboba, W. Dixon | Informational | March 2004 |
| 3720 | Internet Small Computer Systems Interface (iSCSI)J. Satran, K. Meth, C. Sapuntzakis, M. Chadalapaka, E. Zeidner · obsoleted by RFC 7143 | Proposed Standard | April 2004 |
| 3721 | Internet Small Computer Systems Interface (iSCSI) Naming and DiscoveryM. Bakke, J. Hafner, J. Hufferd, K. Voruganti, M. Krueger | Informational | April 2004 |