| 1208 | A Glossary of Networking TermsO.J. Jacobsen, D.C. Lynch | Informational | March 1991 |
| 1321 | The MD5 Message-Digest AlgorithmR. Rivest | Informational | April 1992 |
| 1492 | An Access Control Protocol, Sometimes Called TACACSC. Finseth | Informational | July 1993 |
| 1510 | The Kerberos Network Authentication Service (V5)J. Kohl, C. Neuman · obsoleted by RFC 4120, RFC 6649 | Historic | September 1993 |
| 1704 | On Internet AuthenticationN. Haller, R. Atkinson | Informational | October 1994 |
| 1812 | Requirements for IP Version 4 RoutersF. Baker, Ed. | Proposed Standard | June 1995 |
| 1918 | Address Allocation for Private InternetsY. Rekhter, B. Moskowitz, D. Karrenberg, G. J. de Groot, E. Lear | Best Current Practice | February 1996 |
| 2026 | The Internet Standards Process -- Revision 3S. Bradner | Best Current Practice | October 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2196 | Site Security HandbookB. Fraser | Informational | September 1997 |
| 2246 | The TLS Protocol Version 1.0T. Dierks, C. Allen · obsoleted by RFC 4346 | Historic | January 1999 |
| 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 |
| 2631 | Diffie-Hellman Key Agreement MethodE. Rescorla | Proposed Standard | June 1999 |
| 2827 | Network Ingress Filtering: Defeating Denial of Service Attacks which employ IP Source Address SpoofingP. Ferguson, D. Senie | Best Current Practice | May 2000 |
| 2865 | Remote Authentication Dial In User Service (RADIUS)C. Rigney, S. Willens, A. Rubens, W. Simpson | Draft Standard | June 2000 |
| 3013 | Recommended Internet Service Provider Security Services and ProceduresT. Killalea | Best Current Practice | November 2000 |
| 3164 | The BSD Syslog ProtocolC. Lonvick · obsoleted by RFC 5424 | Informational | August 2001 |
| 3174 | US Secure Hash Algorithm 1 (SHA1)D. Eastlake 3rd, P. Jones | Informational | September 2001 |
| 3195 | Reliable Delivery for syslogD. New, M. Rose | Proposed Standard | November 2001 |
| 3309 | Stream Control Transmission Protocol (SCTP) Checksum ChangeJ. Stone, R. Stewart, D. Otis · obsoleted by RFC 4960 | Proposed Standard | September 2002 |
| 3330 | Special-Use IPv4 AddressesIANA · obsoleted by RFC 5735 | Informational | October 2002 |
| 3360 | Inappropriate TCP Resets Considered HarmfulS. Floyd | Best Current Practice | August 2002 |
| 3410 | Introduction and Applicability Statements for Internet-Standard Management FrameworkJ. Case, R. Mundy, D. Partain, B. Stewart | Informational | December 2002 |
| 3411 | An Architecture for Describing Simple Network Management Protocol (SNMP) Management FrameworksD. Harrington, R. Presuhn, B. Wijnen | Internet Standard | December 2002 |
| 3447 | Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.1J. Jonsson, B. Kaliski · obsoleted by RFC 8017 | Informational | February 2003 |
| 3562 | Key Management Considerations for the TCP MD5 Signature OptionM. Leech | Informational | July 2003 |
| 3579 | RADIUS (Remote Authentication Dial In User Service) Support For Extensible Authentication Protocol (EAP)B. Aboba, P. Calhoun | Informational | September 2003 |
| 3588 | Diameter Base ProtocolP. Calhoun, J. Loughney, E. Guttman, G. Zorn, J. Arkko · obsoleted by RFC 6733 | Proposed Standard | September 2003 |
| 3631 | Security Mechanisms for the InternetS. Bellovin, Ed., J. Schiller, Ed., C. Kaufman, Ed. | Informational | December 2003 |
| 3704 | Ingress Filtering for Multihomed NetworksF. Baker, P. Savola | Best Current Practice | March 2004 |
| 3766 | Determining Strengths For Public Keys Used For Exchanging Symmetric KeysH. Orman, P. Hoffman | Best Current Practice | April 2004 |