RFC Lookup

The UltraTools RFC Lookup tool allows you to search the Internet Engineering Task Force (IETF) Request for Comments (RFCs) based on keyword or RFC number, such as IPv4, IPv6 and DNS. The UltraTools RFC search includes all RFCs incorporated or referenced in the UltraTools.

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Internet Protocol - {data}

RFC 6052- IPv6 Addressing of IPv4/IPv6 Translators RFC 6034- Unicast-Prefix-Based IPv4 Multicast Addresses RFC 6018- IPv4 and IPv6 Greynets RFC 5969- IPv6 Rapid Deployment on IPv4 Infrastructures (6rd) -- Protocol Specification RFC 5948- Transmission of IPv4 Packets over the IP Convergence Sublayer of IEEE 802.16 RFC 5881- Bidirectional Forwarding Detection (BFD) for IPv4 and IPv6 (Single Hop) RFC 5855- Nameservers for IPv4 and IPv6 Reverse Zones RFC 5844- IPv4 Support for Proxy Mobile IPv6 RFC 5798- Virtual Router Redundancy Protocol (VRRP) Version 3 for IPv4 and IPv6 RFC 5771- IANA Guidelines for IPv4 Multicast Address Assignments RFC 5737- IPv4 Address Blocks Reserved for Documentation RFC 5736- IANA IPv4 Special Purpose Address Registry RFC 5735- Special Use IPv4 Addresses RFC 5579- Transmission of IPv4 Packets over Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) Interfaces RFC 5569- IPv6 Rapid Deployment on IPv4 Infrastructures (6rd) RFC 5563- WiMAX Forum / 3GPP2 Proxy Mobile IPv4 RFC 5549- Advertising IPv4 Network Layer Reachability Information with an IPv6 Next Hop RFC 5454- Dual-Stack Mobile IPv4 RFC 5446- Service Selection for Mobile IPv4 RFC 5374- Multicast Extensions to the Security Architecture for the Internet Protocol RFC 5350- IANA Considerations for the IPv4 and IPv6 Router Alert Options RFC 5266- Secure Connectivity and Mobility Using Mobile IPv4 and IKEv2 Mobility and Multihoming (MOBIKE) RFC 5265- Mobile IPv4 Traversal across IPsec-Based VPN Gateways RFC 5227- IPv4 Address Conflict Detection RFC 5177- Network Mobility (NEMO) Extensions for Mobile IPv4 RFC 5118- Session Initiation Protocol (SIP) Torture Test Messages for Internet Protocol Version 6 (IPv6) RFC 5030- Mobile IPv4 RADIUS Requirements RFC 4988- Mobile IPv4 Fast Handovers RFC 4963- IPv4 Reassembly Errors at High Data Rates RFC 4917- Mobile IPv4 Message String Extension RFC 4891- Using IPsec to Secure IPv6-in-IPv4 Tunnels RFC 4881- Low-Latency Handoffs in Mobile IPv4 RFC 4857- Mobile IPv4 Regional Registration RFC 4798- Connecting IPv6 Islands over IPv4 MPLS Using IPv6 Provider Edge Routers (6PE) RFC 4728- The Dynamic Source Routing Protocol (DSR) for Mobile Ad Hoc Networks for IPv4 RFC 4727- Experimental Values In IPv4, IPv6, ICMPv4, ICMPv6, UDP, and TCP Headers RFC 4721- Mobile IPv4 Challenge/Response Extensions (Revised) RFC 4684- Constrained Route Distribution for Border Gateway Protocol/MultiProtocol Label Switching (BGP/MPLS) Internet Protocol (IP) Virtual Private Networks (VPNs) RFC 4636- Foreign Agent Error Extension for Mobile IPv4 RFC 4554- Use of VLANs for IPv4-IPv6 Coexistence in Enterprise Networks RFC 4542- Implementing an Emergency Telecommunications Service (ETS) for Real-Time Services in the Internet Protocol Suite RFC 4477- Dynamic Host Configuration Protocol (DHCP): IPv4 and IPv6 Dual-Stack Issues RFC 4443- Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification RFC 4436- Detecting Network Attachment in IPv4 (DNAv4) RFC 4433- Mobile IPv4 Dynamic Home Agent (HA) Assignment RFC 4338- Transmission of IPv6, IPv4, and Address Resolution Protocol (ARP) Packets over Fibre Channel RFC 4332- Cisco's Mobile IPv4 Host Configuration Extensions RFC 4330- Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and OSI RFC 4301- Security Architecture for the Internet Protocol RFC 4296- The Architecture of Direct Data Placement (DDP) and Remote Direct Memory Access (RDMA) on Internet Protocols RFC 4293- Management Information Base for the Internet Protocol (IP) RFC 4270- Attacks on Cryptographic Hashes in Internet Protocols RFC 4241- A Model of IPv6/IPv4 Dual Stack Internet Access Service RFC 4174- The IPv4 Dynamic Host Configuration Protocol (DHCP) Option for the Internet Storage Name Service RFC 4116- IPv4 Multihoming Practices and Limitations RFC 4093- Problem Statement: Mobile IPv4 Traversal of Virtual Private Network (VPN) Gateways RFC 4064- Experimental Message, Extensions, and Error Codes for Mobile IPv4 RFC 4004- Diameter Mobile IPv4 Application RFC 3974- SMTP Operational Experience in Mixed IPv4/v6 Environments RFC 3957- Authentication, Authorization, and Accounting (AAA) Registration Keys for Mobile IPv4 RFC 3927- Dynamic Configuration of IPv4 Link-Local Addresses RFC 3846- Mobile IPv4 Extension for Carrying Network Access Identifiers RFC 3796- Survey of IPv4 Addresses in Currently Deployed IETF Operations & Management Area Standards Track and Experimental Documents RFC 3795- Survey of IPv4 Addresses in Currently Deployed IETF Application Area Standards Track and Experimental Documents RFC 3794- Survey of IPv4 Addresses in Currently Deployed IETF Transport Area Standards Track and Experimental Documents RFC 3793- Survey of IPv4 Addresses in Currently Deployed IETF Sub-IP Area Standards Track and Experimental Documents RFC 3792- Survey of IPv4 Addresses in Currently Deployed IETF Security Area Standards Track and Experimental Documents RFC 3791- Survey of IPv4 Addresses in Currently Deployed IETF Routing Area Standards Track and Experimental Documents RFC 3790- Survey of IPv4 Addresses in Currently Deployed IETF Internet Area Standards Track and Experimental Documents RFC 3789- Introduction to the Survey of IPv4 Addresses in Currently Deployed IETF Standards Track and Experimental Documents RFC 3572- Internet Protocol Version 6 over MAPOS (Multiple Access Protocol Over SONET/SDH) RFC 3543- Registration Revocation in Mobile IPv4 RFC 3514- The Security Flag in the IPv4 Header RFC 3513- Internet Protocol Version 6 (IPv6) Addressing Architecture RFC 3484- Default Address Selection for Internet Protocol version 6 (IPv6) RFC 3385- Internet Protocol Small Computer System Interface (iSCSI) Cyclic Redundancy Check (CRC)/Checksum Considerations RFC 3364- Tradeoffs in Domain Name System (DNS) Support for Internet Protocol version 6 (IPv6) RFC 3363- Representing Internet Protocol version 6 (IPv6) Addresses in the Domain Name System (DNS) RFC 3361- Dynamic Host Configuration Protocol (DHCP-for-IPv4) Option for Session Initiation Protocol (SIP) Servers RFC 3344- IP Mobility Support for IPv4 RFC 3330- Special-Use IPv4 Addresses RFC 3316- Internet Protocol Version 6 (IPv6) for Some Second and Third Generation Cellular Hosts RFC 3228- IANA Considerations for IPv4 Internet Group Management Protocol (IGMP) RFC 3220- IP Mobility Support for IPv4 RFC 3175- Aggregation of RSVP for IPv4 and IPv6 Reservations RFC 3171- IANA Guidelines for IPv4 Multicast Address Assignments RFC 3142- An IPv6-to-IPv4 Transport Relay Translator RFC 3089- A SOCKS-based IPv6/IPv4 Gateway Mechanism RFC 3056- Connection of IPv6 Domains via IPv4 Clouds RFC 3033- The Assignment of the Information Field and Protocol Identifier in the Q.2941 Generic Identifier and Q.2957 User-to-user Signaling for the Internet Protocol RFC 3021- Using 31-Bit Prefixes on IPv4 Point-to-Point Links RFC 3012- Mobile IPv4 Challenge/Response Extensions RFC 3011- The IPv4 Subnet Selection Option for DHCP RFC 2934- Protocol Independent Multicast MIB for IPv4 RFC 2932- IPv4 Multicast Routing MIB RFC 2873- TCP Processing of the IPv4 Precedence Field RFC 2825- A Tangled Web: Issues of I18N, Domain Names, and the Other Internet protocols RFC 2794- Mobile IP Network Access Identifier Extension for IPv4 RFC 2780- IANA Allocation Guidelines For Values In the Internet Protocol and Related Headers RFC 2734- IPv4 over IEEE 1394 RFC 2563- DHCP Option to Disable Stateless Auto-Configuration in IPv4 Clients RFC 2529- Transmission of IPv6 over IPv4 Domains without Explicit Tunnels RFC 2502- Limitations of Internet Protocol Suite for Distributed Simulation the Large Multicast Environment RFC 2474- Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers RFC 2463- Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification RFC 2460- Internet Protocol, Version 6 (IPv6) Specification RFC 2401- Security Architecture for the Internet Protocol RFC 2372- Transaction Internet Protocol - Requirements and Supplemental Information RFC 2371- Transaction Internet Protocol Version 3.0 RFC 2290- Mobile-IPv4 Configuration Option for PPP IPCP RFC 2176- IPv4 over MAPOS Version 1 RFC 2101- IPv4 Address Behaviour Today RFC 2030- Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and OSI RFC 2011- SNMPv2 Management Information Base for the Internet Protocol using SMIv2 RFC 1954- Transmission of Flow Labelled IPv4 on ATM Data Links Ipsilon Version 1.0 RFC 1953- Ipsilon Flow Management Protocol Specification for IPv4 Version 1.0 RFC 1885- Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) RFC 1883- Internet Protocol, Version 6 (IPv6) Specification RFC 1878- Variable Length Subnet Table For IPv4 RFC 1877- PPP Internet Protocol Control Protocol Extensions for Name Server Addresses RFC 1860- Variable Length Subnet Table For IPv4 RFC 1825- Security Architecture for the Internet Protocol RFC 1770- IPv4 Option for Sender Directed Multi-Destination Delivery RFC 1710- Simple Internet Protocol Plus White Paper RFC 1702- Generic Routing Encapsulation over IPv4 networks RFC 1385- EIP: The Extended Internet Protocol RFC 1349- Type of Service in the Internet Protocol Suite RFC 1332- The PPP Internet Protocol Control Protocol (IPCP) RFC 1226- Internet protocol encapsulation of AX.25 frames RFC 1102- Policy routing in Internet protocols RFC 1044- Internet Protocol on Network System's HYPERchannel: Protocol Specification RFC 1011- Official Internet protocols RFC 991- Official ARPA-Internet protocols RFC 966- Host groups: A multicast extension to the Internet Protocol RFC 963- Some problems with the specification of the Military Standard Internet Protocol RFC 961- Official ARPA-Internet protocols RFC 944- Official ARPA-Internet protocols RFC 924- Official ARPA-Internet protocols for connecting personal computers to the Internet RFC 902- ARPA Internet Protocol policy RFC 901- Official ARPA-Internet protocols RFC 791- Internet Protocol RFC 781- Specification of the Internet Protocol (IP) timestamp option RFC 774- Internet Protocol Handbook: Table of contents RFC 766- Internet Protocol Handbook: Table of contents RFC 760- DoD standard Internet Protocol

Email - {data}

DNS - {data}

RFC 5702- Use of SHA-2 Algorithms with RSA in DNSKEY and RRSIG Resource Records for DNSSEC RFC 5155- DNS Security (DNSSEC) Hashed Authenticated Denial of Existence RFC 5074- DNSSEC Lookaside Validation (DLV) RFC 5011- Automated Updates of DNS Security (DNSSEC) Trust Anchors RFC 4986- Requirements Related to DNS Security (DNSSEC) Trust Anchor Rollover RFC 4956- DNS Security (DNSSEC) Opt-In RFC 4955- DNS Security (DNSSEC) Experiments RFC 4641- DNSSEC Operational Practices RFC 4509- Use of SHA-256 in DNSSEC Delegation Signer (DS) Resource Records (RRs) RFC 4431- The DNSSEC Lookaside Validation (DLV) DNS Resource Record RFC 3845- DNS Security (DNSSEC) NextSECure (NSEC) RDATA Format RFC 3226- DNSSEC and IPv6 A6 aware server/resolver message size requirements RFC 3225- Indicating Resolver Support of DNSSEC RFC 3130- Notes from the State-Of-The-Technology: DNSSEC RFC 3008- Domain Name System Security (DNSSEC) Signing Authority RFC 5933- Use of GOST Signature Algorithms in DNSKEY and RRSIG Resource Records for DNSSEC RFC 4470- Minimally Covering NSEC Records and DNSSEC On-line Signing

RFC 5564- Linguistic Guidelines for the Use of the Arabic Language in Internet Domains RFC 2053- The AM (Armenia) Domain RFC 1956- Registration in the MIL Domain RFC 1480- The US Domain RFC 1394- Relationship of Telex Answerback Codes to Internet Domains RFC 1386- The US Domain

WHOIS - {data}

RFC 2167- Referral Whois (RWhois) Protocol V1.5 RFC 1714- Referral Whois Protocol (RWhois)

RFC 3912- WHOIS Protocol Specification RFC 2958- The application/whoispp-response Content-type RFC 2957- The application/whoispp-query Content-Type RFC 2167- Referral Whois (RWhois) Protocol V1.5 RFC 1914- How to Interact with a Whois++ Mesh RFC 1913- Architecture of the Whois++ Index Service RFC 1835- Architecture of the WHOIS++ service RFC 1834- Whois and Network Information Lookup Service, Whois++ RFC 1714- Referral Whois Protocol (RWhois) RFC 954- NICNAME/WHOIS RFC 812- NICNAME/WHOIS

WWW - {data}

RFC 5989- A SIP Event Package for Subscribing to Changes to an HTTP Resource RFC 5987- Character Set and Language Encoding for Hypertext Transfer Protocol (HTTP) Header Field Parameters RFC 5985- HTTP-Enabled Location Delivery (HELD) RFC 5861- HTTP Cache-Control Extensions for Stale Content RFC 5843- Additional Hash Algorithms for HTTP Instance Digests RFC 5789- PATCH Method for HTTP RFC 4918- HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) RFC 4559- SPNEGO-based Kerberos and NTLM HTTP Authentication in Microsoft Windows RFC 4387- Internet X.509 Public Key Infrastructure Operational Protocols: Certificate Store Access via HTTP RFC 4236- HTTP Adaptation with Open Pluggable Edge Services (OPES) RFC 4229- HTTP Header Field Registrations RFC 4169- Hypertext Transfer Protocol (HTTP) Digest Authentication Using Authentication and Key Agreement (AKA) Version-2 RFC 4130- MIME-Based Secure Peer-to-Peer Business Data Interchange Using HTTP, Applicability Statement 2 (AS2) RFC 3310- Hypertext Transfer Protocol (HTTP) Digest Authentication Using Authentication and Key Agreement (AKA) RFC 3230- Instance Digests in HTTP RFC 3229- Delta encoding in HTTP RFC 3205- On the use of HTTP as a Substrate RFC 3143- Known HTTP Proxy/Caching Problems RFC 2965- HTTP State Management Mechanism RFC 2964- Use of HTTP State Management RFC 2936- HTTP MIME Type Handler Detection RFC 2935- Internet Open Trading Protocol (IOTP) HTTP Supplement RFC 2818- HTTP Over TLS RFC 2817- Upgrading to TLS Within HTTP/1.1 RFC 2774- An HTTP Extension Framework RFC 2756- Hyper Text Caching Protocol (HTCP/0.0) RFC 2660- The Secure HyperText Transfer Protocol RFC 2617- HTTP Authentication: Basic and Digest Access Authentication RFC 2616- Hypertext Transfer Protocol -- HTTP/1.1 RFC 2585- Internet X.509 Public Key Infrastructure Operational Protocols: FTP and HTTP RFC 2518- HTTP Extensions for Distributed Authoring -- WEBDAV RFC 2324- Hyper Text Coffee Pot Control Protocol (HTCPCP/1.0) RFC 2296- HTTP Remote Variant Selection Algorithm -- RVSA/1.0 RFC 2295- Transparent Content Negotiation in HTTP RFC 2227- Simple Hit-Metering and Usage-Limiting for HTTP RFC 2169- A Trivial Convention for using HTTP in URN Resolution RFC 2145- Use and Interpretation of HTTP Version Numbers RFC 2109- HTTP State Management Mechanism RFC 2070- Internationalization of the Hypertext Markup Language RFC 2069- An Extension to HTTP : Digest Access Authentication RFC 2068- Hypertext Transfer Protocol -- HTTP/1.1 RFC 1945- Hypertext Transfer Protocol -- HTTP/1.0 RFC 1866- Hypertext Markup Language - 2.0

RFC 5791- RFC 2731 ("Encoding Dublin Core Metadata in HTML") Is Obsolete RFC 3236- The 'application/xhtml+xml' Media Type RFC 2854- The 'text/html' Media Type RFC 2731- Encoding Dublin Core Metadata in HTML RFC 2659- Security Extensions For HTML RFC 2557- MIME Encapsulation of Aggregate Documents, such as HTML (MHTML) RFC 2110- MIME E-mail Encapsulation of Aggregate Documents, such as HTML (MHTML) RFC 1980- A Proposed Extension to HTML : Client-Side Image Maps RFC 1942- HTML Tables RFC 1867- Form-based File Upload in HTML

About the RFC Lookup Tool

The Internet Engineering Task Force (IETF) is an international standards body responsible for designing many of the protocols and technologies used on the Internet. Specifications are published in the form of Requests for Comments (RFCs), which IETF members migrate through a process until the specification is complete. The UltraTools RFC Lookup Tool allows you to search for these RFCs by keyword or number.

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Internet Protocol - {data}

Email - {data}

DNS - {data}

WHOIS - {data}

WWW - {data}

About the RFC Lookup Tool