| 2500 | Internet Official Protocol StandardsJ. Reynolds, R. Braden · obsoleted by RFC 2600 | Historic | June 1999 |
| 2501 | Mobile Ad hoc Networking (MANET): Routing Protocol Performance Issues and Evaluation ConsiderationsS. Corson, J. Macker | Informational | January 1999 |
| 2502 | Limitations of Internet Protocol Suite for Distributed Simulation the Large Multicast EnvironmentM. Pullen, M. Myjak, C. Bouwens | Informational | February 1999 |
| 2503 | MIME Types for Use with the ISO ILL ProtocolR. Moulton, M. Needleman | Informational | February 1999 |
| 2504 | Users' Security HandbookE. Guttman, L. Leong, G. Malkin | Informational | February 1999 |
| 2505 | Anti-Spam Recommendations for SMTP MTAsG. Lindberg | Best Current Practice | February 1999 |
| 2506 | Media Feature Tag Registration ProcedureK. Holtman, A. Mutz, T. Hardie | Best Current Practice | March 1999 |
| 2507 | IP Header CompressionM. Degermark, B. Nordgren, S. Pink | Proposed Standard | February 1999 |
| 2508 | Compressing IP/UDP/RTP Headers for Low-Speed Serial LinksS. Casner, V. Jacobson | Proposed Standard | February 1999 |
| 2509 | IP Header Compression over PPPM. Engan, S. Casner, C. Bormann · obsoleted by RFC 3544 | Proposed Standard | February 1999 |
| 2510 | Internet X.509 Public Key Infrastructure Certificate Management ProtocolsC. Adams, S. Farrell · obsoleted by RFC 4210 | Proposed Standard | March 1999 |
| 2511 | Internet X.509 Certificate Request Message FormatM. Myers, C. Adams, D. Solo, D. Kemp · obsoleted by RFC 4211 | Proposed Standard | March 1999 |
| 2512 | Accounting Information for ATM NetworksK. McCloghrie, J. Heinanen, W. Greene, A. Prasad | Proposed Standard | February 1999 |
| 2513 | Managed Objects for Controlling the Collection and Storage of Accounting Information for Connection-Oriented NetworksK. McCloghrie, J. Heinanen, W. Greene, A. Prasad | Proposed Standard | February 1999 |
| 2514 | Definitions of Textual Conventions and OBJECT-IDENTITIES for ATM ManagementM. Noto, E. Spiegel, K. Tesink | Proposed Standard | February 1999 |
| 2515 | Definitions of Managed Objects for ATM ManagementK. Tesink, Ed. | Proposed Standard | February 1999 |
| 2516 | A Method for Transmitting PPP Over Ethernet (PPPoE)L. Mamakos, K. Lidl, J. Evarts, D. Carrel, D. Simone, R. Wheeler | Informational | February 1999 |
| 2517 | Building Directories from DNS: Experiences from WWWSeekerR. Moats, R. Huber | Informational | February 1999 |
| 2518 | HTTP Extensions for Distributed Authoring -- WEBDAVY. Goland, E. Whitehead, A. Faizi, S. Carter, D. Jensen · obsoleted by RFC 4918 | Proposed Standard | February 1999 |
| 2519 | A Framework for Inter-Domain Route AggregationE. Chen, J. Stewart | Informational | February 1999 |
| 2520 | NHRP with Mobile NHCsJ. Luciani, H. Suzuki, N. Doraswamy, D. Horton | Experimental | February 1999 |
| 2521 | ICMP Security Failures MessagesP. Karn, W. Simpson | Experimental | March 1999 |
| 2522 | Photuris: Session-Key Management ProtocolP. Karn, W. Simpson | Experimental | March 1999 |
| 2523 | Photuris: Extended Schemes and AttributesP. Karn, W. Simpson | Experimental | March 1999 |
| 2524 | Neda's Efficient Mail Submission and Delivery (EMSD) Protocol Specification Version 1.3M. Banan | Informational | February 1999 |
| 2525 | Known TCP Implementation ProblemsV. Paxson, M. Allman, S. Dawson, W. Fenner, J. Griner, I. Heavens, K. Lahey, J. Semke, B. Volz | Informational | March 1999 |
| 2526 | Reserved IPv6 Subnet Anycast AddressesD. Johnson, S. Deering | Proposed Standard | March 1999 |
| 2527 | Internet X.509 Public Key Infrastructure Certificate Policy and Certification Practices FrameworkS. Chokhani, W. Ford · obsoleted by RFC 3647 | Informational | March 1999 |
| 2528 | Internet X.509 Public Key Infrastructure Representation of Key Exchange Algorithm (KEA) Keys in Internet X.509 Public Key Infrastructure CertificatesR. Housley, W. Polk | Informational | March 1999 |
| 2529 | Transmission of IPv6 over IPv4 Domains without Explicit TunnelsB. Carpenter, C. Jung | Proposed Standard | March 1999 |
| 2530 | Indicating Supported Media Features Using Extensions to DSN and MDND. Wing | Proposed Standard | March 1999 |
| 2531 | Content Feature Schema for Internet FaxG. Klyne, L. McIntyre · obsoleted by RFC 2879 | Proposed Standard | March 1999 |
| 2532 | Extended Facsimile Using Internet MailL. Masinter, D. Wing | Proposed Standard | March 1999 |
| 2533 | A Syntax for Describing Media Feature SetsG. Klyne | Proposed Standard | March 1999 |
| 2534 | Media Features for Display, Print, and FaxL. Masinter, D. Wing, A. Mutz, K. Holtman | Proposed Standard | March 1999 |
| 2535 | Domain Name System Security ExtensionsD. Eastlake 3rd · obsoleted by RFC 4033, RFC 4034, RFC 4035 | Proposed Standard | March 1999 |
| 2536 | DSA KEYs and SIGs in the Domain Name System (DNS)D. Eastlake 3rd | Proposed Standard | March 1999 |
| 2537 | RSA/MD5 KEYs and SIGs in the Domain Name System (DNS)D. Eastlake 3rd · obsoleted by RFC 3110 | Proposed Standard | March 1999 |
| 2538 | Storing Certificates in the Domain Name System (DNS)D. Eastlake 3rd, O. Gudmundsson · obsoleted by RFC 4398 | Proposed Standard | March 1999 |
| 2539 | Storage of Diffie-Hellman Keys in the Domain Name System (DNS)D. Eastlake 3rd | Proposed Standard | March 1999 |
| 2540 | Detached Domain Name System (DNS) InformationD. Eastlake 3rd | Experimental | March 1999 |
| 2541 | DNS Security Operational ConsiderationsD. Eastlake 3rd · obsoleted by RFC 4641 | Informational | March 1999 |
| 2542 | Terminology and Goals for Internet FaxL. Masinter | Informational | March 1999 |
| 2543 | SIP: Session Initiation ProtocolM. Handley, H. Schulzrinne, E. Schooler, J. Rosenberg · obsoleted by RFC 3261, RFC 3262, RFC 3263, RFC 3264, RFC 3265 | Proposed Standard | March 1999 |
| 2544 | Benchmarking Methodology for Network Interconnect DevicesS. Bradner, J. McQuaid | Informational | March 1999 |
| 2545 | Use of BGP-4 Multiprotocol Extensions for IPv6 Inter-Domain RoutingP. Marques, F. Dupont | Proposed Standard | March 1999 |
| 2546 | 6Bone Routing PracticeA. Durand, B. Buclin · obsoleted by RFC 2772 | Informational | March 1999 |
| 2547 | BGP/MPLS VPNsE. Rosen, Y. Rekhter · obsoleted by RFC 4364 | Informational | March 1999 |
| 2548 | Microsoft Vendor-specific RADIUS AttributesG. Zorn | Informational | March 1999 |
| 2549 | IP over Avian Carriers with Quality of ServiceD. Waitzman | Informational | 1 April 1999 |
| 2550 | Y10K and BeyondS. Glassman, M. Manasse, J. Mogul | Informational | 1 April 1999 |
| 2551 | The Roman Standards Process -- Revision IIIS. Bradner | Informational | 1 April 1999 |
| 2552 | Architecture for the Information Brokerage in the ACTS Project GAIAM. Blinov, M. Bessonov, C. Clissmann | Informational | April 1999 |
| 2553 | Basic Socket Interface Extensions for IPv6R. Gilligan, S. Thomson, J. Bound, W. Stevens · obsoleted by RFC 3493 | Informational | March 1999 |
| 2554 | SMTP Service Extension for AuthenticationJ. Myers · obsoleted by RFC 4954 | Proposed Standard | March 1999 |
| 2555 | 30 Years of RFCsRFC Editor, et al. | Informational | April 1999 |
| 2556 | OSI connectionless transport services on top of UDP Applicability Statement for Historic StatusS. Bradner | Informational | March 1999 |
| 2557 | MIME Encapsulation of Aggregate Documents, such as HTML (MHTML)J. Palme, A. Hopmann, N. Shelness | Proposed Standard | March 1999 |
| 2558 | Definitions of Managed Objects for the SONET/SDH Interface TypeK. Tesink · obsoleted by RFC 3592 | Proposed Standard | March 1999 |
| 2559 | Internet X.509 Public Key Infrastructure Operational Protocols - LDAPv2S. Boeyen, T. Howes, P. Richard · obsoleted by RFC 3494 | Historic | April 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 |
| 2561 | Base Definitions of Managed Objects for TN3270E Using SMIv2K. White, R. Moore | Proposed Standard | April 1999 |
| 2562 | Definitions of Protocol and Managed Objects for TN3270E Response Time Collection Using SMIv2 (TN3270E-RT-MIB)K. White, R. Moore | Proposed Standard | April 1999 |
| 2563 | DHCP Option to Disable Stateless Auto-Configuration in IPv4 ClientsR. Troll | Proposed Standard | May 1999 |
| 2564 | Application Management MIBC. Kalbfleisch, C. Krupczak, R. Presuhn, J. Saperia | Proposed Standard | May 1999 |
| 2565 | Internet Printing Protocol/1.0: Encoding and TransportR. Herriot, Ed., S. Butler, P. Moore, R. Turner · obsoleted by RFC 2910 | Experimental | April 1999 |
| 2566 | Internet Printing Protocol/1.0: Model and SemanticsR. deBry, T. Hastings, R. Herriot, S. Isaacson, P. Powell · obsoleted by RFC 2911 | Experimental | April 1999 |
| 2567 | Design Goals for an Internet Printing ProtocolF. Wright | Experimental | April 1999 |
| 2568 | Rationale for the Structure of the Model and Protocol for the Internet Printing ProtocolS. Zilles | Experimental | April 1999 |
| 2569 | Mapping between LPD and IPP ProtocolsR. Herriot, Ed., T. Hastings, N. Jacobs, J. Martin | Experimental | April 1999 |
| 2570 | Introduction to Version 3 of the Internet-standard Network Management FrameworkJ. Case, R. Mundy, D. Partain, B. Stewart · obsoleted by RFC 3410 | Informational | April 1999 |
| 2571 | An Architecture for Describing SNMP Management FrameworksB. Wijnen, D. Harrington, R. Presuhn · obsoleted by RFC 3411 | Draft Standard | April 1999 |
| 2572 | Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)J. Case, D. Harrington, R. Presuhn, B. Wijnen · obsoleted by RFC 3412 | Draft Standard | April 1999 |
| 2573 | SNMP ApplicationsD. Levi, P. Meyer, B. Stewart · obsoleted by RFC 3413 | Draft Standard | April 1999 |
| 2574 | User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)U. Blumenthal, B. Wijnen · obsoleted by RFC 3414 | Draft Standard | April 1999 |
| 2575 | View-based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)B. Wijnen, R. Presuhn, K. McCloghrie · obsoleted by RFC 3415 | Draft Standard | April 1999 |
| 2576 | Coexistence between Version 1, Version 2, and Version 3 of the Internet-standard Network Management FrameworkR. Frye, D. Levi, S. Routhier, B. Wijnen · obsoleted by RFC 3584 | Proposed Standard | March 2000 |
| 2577 | FTP Security ConsiderationsM. Allman, S. Ostermann | Informational | May 1999 |
| 2578 | Structure of Management Information Version 2 (SMIv2)K. McCloghrie, Ed., D. Perkins, Ed., J. Schoenwaelder, Ed. | Internet Standard | April 1999 |
| 2579 | Textual Conventions for SMIv2K. McCloghrie, Ed., D. Perkins, Ed., J. Schoenwaelder, Ed. | Internet Standard | April 1999 |
| 2580 | Conformance Statements for SMIv2K. McCloghrie, Ed., D. Perkins, Ed., J. Schoenwaelder, Ed. | Internet Standard | April 1999 |
| 2581 | TCP Congestion ControlM. Allman, V. Paxson, W. Stevens · obsoleted by RFC 5681 | Proposed Standard | April 1999 |
| 2582 | The NewReno Modification to TCP's Fast Recovery AlgorithmS. Floyd, T. Henderson · obsoleted by RFC 3782 | Experimental | April 1999 |
| 2583 | Guidelines for Next Hop Client (NHC) DevelopersR. Carlson, L. Winkler | Informational | May 1999 |
| 2584 | Definitions of Managed Objects for APPN/HPR in IP NetworksB. Clouston, B. Moore | Proposed Standard | May 1999 |
| 2585 | Internet X.509 Public Key Infrastructure Operational Protocols: FTP and HTTPR. Housley, P. Hoffman | Proposed Standard | May 1999 |
| 2586 | The Audio/L16 MIME content typeJ. Salsman, H. Alvestrand | Informational | May 1999 |
| 2587 | Internet X.509 Public Key Infrastructure LDAPv2 SchemaS. Boeyen, T. Howes, P. Richard · obsoleted by RFC 4523 | Proposed Standard | June 1999 |
| 2588 | IP Multicast and FirewallsR. Finlayson | Informational | May 1999 |
| 2589 | Lightweight Directory Access Protocol (v3): Extensions for Dynamic Directory ServicesY. Yaacovi, M. Wahl, T. Genovese | Proposed Standard | May 1999 |
| 2590 | Transmission of IPv6 Packets over Frame Relay Networks SpecificationA. Conta, A. Malis, M. Mueller | Proposed Standard | May 1999 |
| 2591 | Definitions of Managed Objects for Scheduling Management OperationsD. Levi, J. Schoenwaelder · obsoleted by RFC 3231 | Proposed Standard | May 1999 |
| 2592 | Definitions of Managed Objects for the Delegation of Management ScriptD. Levi, J. Schoenwaelder · obsoleted by RFC 3165 | Proposed Standard | May 1999 |
| 2593 | Script MIB Extensibility Protocol Version 1.0J. Schoenwaelder, J. Quittek · obsoleted by RFC 3179 | Experimental | May 1999 |
| 2594 | Definitions of Managed Objects for WWW ServicesH. Hazewinkel, C. Kalbfleisch, J. Schoenwaelder | Proposed Standard | May 1999 |
| 2595 | Using TLS with IMAP, POP3 and ACAPC. Newman | Proposed Standard | June 1999 |
| 2596 | Use of Language Codes in LDAPM. Wahl, T. Howes · obsoleted by RFC 3866 | Proposed Standard | May 1999 |
| 2597 | Assured Forwarding PHB GroupJ. Heinanen, F. Baker, W. Weiss, J. Wroclawski | Proposed Standard | June 1999 |
| 2598 | An Expedited Forwarding PHBV. Jacobson, K. Nichols, K. Poduri · obsoleted by RFC 3246 | Proposed Standard | June 1999 |
| 2599 | Request for Comments Summary RFC Numbers 2500-2599A. DeLaCruz | Informational | March 2000 |