| 2400 | Internet Official Protocol StandardsJ. Postel, J. Reynolds · obsoleted by RFC 2500 | Historic | September 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 |
| 2410 | The NULL Encryption Algorithm and Its Use With IPsecR. Glenn, S. Kent | Proposed Standard | November 1998 |
| 2411 | IP Security Document RoadmapR. Thayer, N. Doraswamy, R. Glenn · obsoleted by RFC 6071 | Informational | November 1998 |
| 2412 | The OAKLEY Key Determination ProtocolH. Orman | Informational | November 1998 |
| 2413 | Dublin Core Metadata for Resource DiscoveryS. Weibel, J. Kunze, C. Lagoze, M. Wolf · obsoleted by RFC 5013 | Informational | September 1998 |
| 2414 | Increasing TCP's Initial WindowM. Allman, S. Floyd, C. Partridge · obsoleted by RFC 3390 | Experimental | September 1998 |
| 2415 | Simulation Studies of Increased Initial TCP Window SizeK. Poduri, K. Nichols | Informational | September 1998 |
| 2416 | When TCP Starts Up With Four Packets Into Only Three BuffersT. Shepard, C. Partridge | Informational | September 1998 |
| 2417 | Definitions of Managed Objects for Multicast over UNI 3.0/3.1 based ATM NetworksC. Chung, M. Greene | Proposed Standard | September 1998 |
| 2418 | IETF Working Group Guidelines and ProceduresS. Bradner | Best Current Practice | September 1998 |
| 2419 | The PPP DES Encryption Protocol, Version 2 (DESE-bis)K. Sklower, G. Meyer | Proposed Standard | September 1998 |
| 2420 | The PPP Triple-DES Encryption Protocol (3DESE)H. Kummert | Proposed Standard | September 1998 |
| 2421 | Voice Profile for Internet Mail - version 2G. Vaudreuil, G. Parsons · obsoleted by RFC 3801 | Proposed Standard | September 1998 |
| 2422 | Toll Quality Voice - 32 kbit/s ADPCM MIME Sub-type RegistrationG. Vaudreuil, G. Parsons · obsoleted by RFC 3802 | Proposed Standard | September 1998 |
| 2423 | VPIM Voice Message MIME Sub-type RegistrationG. Vaudreuil, G. Parsons · obsoleted by RFC 3801 | Proposed Standard | September 1998 |
| 2424 | Content Duration MIME Header DefinitionG. Vaudreuil, G. Parsons · obsoleted by RFC 3803 | Proposed Standard | September 1998 |
| 2425 | A MIME Content-Type for Directory InformationT. Howes, M. Smith, F. Dawson · obsoleted by RFC 6350 | Proposed Standard | September 1998 |
| 2426 | vCard MIME Directory ProfileF. Dawson, T. Howes · obsoleted by RFC 6350 | Proposed Standard | September 1998 |
| 2427 | Multiprotocol Interconnect over Frame RelayC. Brown, A. Malis | Internet Standard | September 1998 |
| 2428 | FTP Extensions for IPv6 and NATsM. Allman, S. Ostermann, C. Metz | Proposed Standard | September 1998 |
| 2429 | RTP Payload Format for the 1998 Version of ITU-T Rec. H.263 Video (H.263+)C. Bormann, L. Cline, G. Deisher, T. Gardos, C. Maciocco, D. Newell, J. Ott, G. Sullivan, S. Wenger, C. Zhu · obsoleted by RFC 4629 | Proposed Standard | October 1998 |
| 2430 | A Provider Architecture for Differentiated Services and Traffic Engineering (PASTE)T. Li, Y. Rekhter | Informational | October 1998 |
| 2431 | RTP Payload Format for BT.656 Video EncodingD. Tynan | Proposed Standard | October 1998 |
| 2432 | Terminology for IP Multicast BenchmarkingK. Dubray | Informational | October 1998 |
| 2433 | Microsoft PPP CHAP ExtensionsG. Zorn, S. Cobb | Informational | October 1998 |
| 2434 | Guidelines for Writing an IANA Considerations Section in RFCsT. Narten, H. Alvestrand · obsoleted by RFC 5226 | Best Current Practice | October 1998 |
| 2435 | RTP Payload Format for JPEG-compressed VideoL. Berc, W. Fenner, R. Frederick, S. McCanne, P. Stewart | Proposed Standard | October 1998 |
| 2436 | Collaboration between ISOC/IETF and ITU-TR. Brett, S. Bradner, G. Parsons · obsoleted by RFC 3356 | Informational | October 1998 |
| 2437 | PKCS #1: RSA Cryptography Specifications Version 2.0B. Kaliski, J. Staddon · obsoleted by RFC 3447 | Informational | October 1998 |
| 2438 | Advancement of MIB specifications on the IETF Standards TrackM. O'Dell, H. Alvestrand, B. Wijnen, S. Bradner | Best Current Practice | October 1998 |
| 2439 | BGP Route Flap DampingC. Villamizar, R. Chandra, R. Govindan | Proposed Standard | November 1998 |
| 2440 | OpenPGP Message FormatJ. Callas, L. Donnerhacke, H. Finney, R. Thayer · obsoleted by RFC 4880 | Proposed Standard | November 1998 |
| 2441 | Working with Jon, Tribute delivered at UCLA, October 30, 1998D. Cohen | Informational | November 1998 |
| 2442 | The Batch SMTP Media TypeN. Freed, D. Newman, J. Belissent, M. Hoy | Informational | November 1998 |
| 2443 | A Distributed MARS Service Using SCSPJ. Luciani, A. Gallo | Experimental | November 1998 |
| 2444 | The One-Time-Password SASL MechanismC. Newman | Proposed Standard | October 1998 |
| 2445 | Internet Calendaring and Scheduling Core Object Specification (iCalendar)F. Dawson, D. Stenerson · obsoleted by RFC 5545 | Proposed Standard | November 1998 |
| 2446 | iCalendar Transport-Independent Interoperability Protocol (iTIP) Scheduling Events, BusyTime, To-dos and Journal EntriesS. Silverberg, S. Mansour, F. Dawson, R. Hopson · obsoleted by RFC 5546 | Proposed Standard | November 1998 |
| 2447 | iCalendar Message-Based Interoperability Protocol (iMIP)F. Dawson, S. Mansour, S. Silverberg · obsoleted by RFC 6047 | Proposed Standard | November 1998 |
| 2448 | AT&T's Error Resilient Video Transmission TechniqueM. Civanlar, G. Cash, B. Haskell | Informational | November 1998 |
| 2449 | POP3 Extension MechanismR. Gellens, C. Newman, L. Lundblade | Proposed Standard | November 1998 |
| 2450 | Proposed TLA and NLA Assignment RuleR. Hinden | Informational | December 1998 |
| 2451 | The ESP CBC-Mode Cipher AlgorithmsR. Pereira, R. Adams | Proposed Standard | November 1998 |
| 2452 | IP Version 6 Management Information Base for the Transmission Control ProtocolM. Daniele · obsoleted by RFC 4022, RFC 8096 | Historic | December 1998 |
| 2453 | RIP Version 2G. Malkin | Internet Standard | November 1998 |
| 2454 | IP Version 6 Management Information Base for the User Datagram ProtocolM. Daniele · obsoleted by RFC 4113, RFC 8096 | Historic | December 1998 |
| 2455 | Definitions of Managed Objects for APPNB. Clouston, B. Moore | Proposed Standard | November 1998 |
| 2456 | Definitions of Managed Objects for APPN TRAPSB. Clouston, B. Moore | Proposed Standard | November 1998 |
| 2457 | Definitions of Managed Objects for Extended Border NodeB. Clouston, B. Moore | Proposed Standard | November 1998 |
| 2458 | Toward the PSTN/Internet Inter-Networking--Pre-PINT ImplementationsH. Lu, M. Krishnaswamy, L. Conroy, S. Bellovin, F. Burg, A. DeSimone, K. Tewani, P. Davidson, H. Schulzrinne, K. Vishwanathan | Informational | November 1998 |
| 2459 | Internet X.509 Public Key Infrastructure Certificate and CRL ProfileR. Housley, W. Ford, W. Polk, D. Solo · obsoleted by RFC 3280 | Proposed Standard | January 1999 |
| 2460 | Internet Protocol, Version 6 (IPv6) SpecificationS. Deering, R. Hinden · obsoleted by RFC 8200 | Draft Standard | December 1998 |
| 2461 | Neighbor Discovery for IP Version 6 (IPv6)T. Narten, E. Nordmark, W. Simpson · obsoleted by RFC 4861 | Draft Standard | December 1998 |
| 2462 | IPv6 Stateless Address AutoconfigurationS. Thomson, T. Narten · obsoleted by RFC 4862 | Draft Standard | December 1998 |
| 2463 | Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) SpecificationA. Conta, S. Deering · obsoleted by RFC 4443 | Draft Standard | December 1998 |
| 2464 | Transmission of IPv6 Packets over Ethernet NetworksM. Crawford | Proposed Standard | December 1998 |
| 2465 | Management Information Base for IP Version 6: Textual Conventions and General GroupD. Haskin, S. Onishi · obsoleted by RFC 4293, RFC 8096 | Historic | December 1998 |
| 2466 | Management Information Base for IP Version 6: ICMPv6 GroupD. Haskin, S. Onishi · obsoleted by RFC 4293, RFC 8096 | Historic | December 1998 |
| 2467 | Transmission of IPv6 Packets over FDDI NetworksM. Crawford | Proposed Standard | December 1998 |
| 2468 | I REMEMBER IANAV. Cerf | Informational | October 1998 |
| 2469 | A Caution On The Canonical Ordering Of Link-Layer AddressesT. Narten, C. Burton | Informational | December 1998 |
| 2470 | Transmission of IPv6 Packets over Token Ring NetworksM. Crawford, T. Narten, S. Thomas | Proposed Standard | December 1998 |
| 2471 | IPv6 Testing Address AllocationR. Hinden, R. Fink, J. Postel · obsoleted by RFC 3701 | Historic | December 1998 |
| 2472 | IP Version 6 over PPPD. Haskin, E. Allen · obsoleted by RFC 5072, RFC 5172 | Proposed Standard | December 1998 |
| 2473 | Generic Packet Tunneling in IPv6 SpecificationA. Conta, S. Deering | Proposed Standard | December 1998 |
| 2474 | Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 HeadersK. Nichols, S. Blake, F. Baker, D. Black | Proposed Standard | December 1998 |
| 2475 | An Architecture for Differentiated ServicesS. Blake, D. Black, M. Carlson, E. Davies, Z. Wang, W. Weiss | Informational | December 1998 |
| 2476 | Message SubmissionR. Gellens, J. Klensin · obsoleted by RFC 4409 | Proposed Standard | December 1998 |
| 2477 | Criteria for Evaluating Roaming ProtocolsB. Aboba, G. Zorn | Informational | January 1999 |
| 2478 | The Simple and Protected GSS-API Negotiation MechanismE. Baize, D. Pinkas · obsoleted by RFC 4178 | Proposed Standard | December 1998 |
| 2479 | Independent Data Unit Protection Generic Security Service Application Program Interface (IDUP-GSS-API)C. Adams | Informational | December 1998 |
| 2480 | Gateways and MIME Security MultipartsN. Freed | Proposed Standard | January 1999 |
| 2481 | A Proposal to add Explicit Congestion Notification (ECN) to IPK. Ramakrishnan, S. Floyd · obsoleted by RFC 3168 | Experimental | January 1999 |
| 2482 | Language Tagging in Unicode Plain TextK. Whistler, G. Adams · obsoleted by RFC 6082 | Historic | January 1999 |
| 2483 | URI Resolution Services Necessary for URN ResolutionM. Mealling, R. Daniel | Experimental | January 1999 |
| 2484 | PPP LCP Internationalization Configuration OptionG. Zorn | Proposed Standard | January 1999 |
| 2485 | DHCP Option for The Open Group's User Authentication ProtocolS. Drach | Proposed Standard | January 1999 |
| 2486 | The Network Access IdentifierB. Aboba, M. Beadles · obsoleted by RFC 4282 | Proposed Standard | January 1999 |
| 2487 | SMTP Service Extension for Secure SMTP over TLSP. Hoffman · obsoleted by RFC 3207 | Proposed Standard | January 1999 |
| 2488 | Enhancing TCP Over Satellite Channels using Standard MechanismsM. Allman, D. Glover, L. Sanchez | Best Current Practice | January 1999 |
| 2489 | Procedure for Defining New DHCP OptionsR. Droms · obsoleted by RFC 2939 | Best Current Practice | January 1999 |
| 2490 | A Simulation Model for IP Multicast with RSVPM. Pullen, R. Malghan, L. Lavu, G. Duan, J. Ma, H. Nah | Informational | January 1999 |
| 2491 | IPv6 over Non-Broadcast Multiple Access (NBMA) networksG. Armitage, P. Schulter, M. Jork, G. Harter | Proposed Standard | January 1999 |
| 2492 | IPv6 over ATM NetworksG. Armitage, P. Schulter, M. Jork | Proposed Standard | January 1999 |
| 2493 | Textual Conventions for MIB Modules Using Performance History Based on 15 Minute IntervalsK. Tesink, Ed. · obsoleted by RFC 3593 | Proposed Standard | January 1999 |
| 2494 | Definitions of Managed Objects for the DS0 and DS0 Bundle Interface TypeD. Fowler, Ed. | Proposed Standard | January 1999 |
| 2495 | Definitions of Managed Objects for the DS1, E1, DS2 and E2 Interface TypesD. Fowler, Ed. · obsoleted by RFC 3895 | Proposed Standard | January 1999 |
| 2496 | Definitions of Managed Object for the DS3/E3 Interface TypeD. Fowler, Ed. · obsoleted by RFC 3896 | Proposed Standard | January 1999 |
| 2497 | Transmission of IPv6 Packets over ARCnet NetworksI. Souvatzis | Proposed Standard | January 1999 |
| 2498 | IPPM Metrics for Measuring ConnectivityJ. Mahdavi, V. Paxson · obsoleted by RFC 2678 | Experimental | January 1999 |
| 2499 | Request for Comments SummaryA. Ramos | Informational | July 1999 |