Internet Assigned Numbers Authority • Domains • Protocols • Numbers • About Network News Transfer Protocol (NNTP) Parameters Created 2005-07-12 Last Updated 2017-04-24 Available Formats [IMG] XML [IMG] HTML [IMG] TXT Registries Included Below • NNTP Capability Labels • NNTP Compression Algorithms NNTP Capability Labels Registration Procedure(s) Labels beginning with X are reserved for private use. All others: Standards Track RFC or an IESG-approved experimental protocol. Reference [RFC 3977] Note All capability labels in the registry MUST consist only of US-ASCII letters, digits, and the characters dot (".") and dash ("-"), and MUST begin with a letter other than X. They MUST be at least three characters. Available Formats [IMG] CSV Label Meaning Reference AUTHINFO Authentication [RFC 4643] COMPRESS Supported compression algorithms [RFC 8054] HDR Batched header retrieval [RFC 3977] IHAVE IHAVE command available [RFC 3977] IMPLEMENTATION Server implementation-specific information [RFC 3977] LIST LIST command variants [RFC 3977]; [RFC 6048] MODE-READER Mode-switching server and MODE READER command available [RFC 3977] NEWNEWS NEWNEWS command available [RFC 3977] OVER Overview support [RFC 3977] POST POST command available [RFC 3977] READER Reader commands available [RFC 3977] SASL Supported SASL mechanisms [RFC 4643] STARTTLS Transport layer security [RFC 4642]; [RFC 8143] STREAMING Streaming feeds [RFC 4644] VERSION Supported NNTP versions [RFC 3977] NNTP Compression Algorithms Registration Procedure(s) First Come First Served Reference [RFC 8054] Note NNTP compression algorithms are named by strings from 1 to 20 characters in length consisting of uppercase letters, digits, hyphens, and/or underscores. Available Formats [IMG] CSV Algorithm Name Intended Usage Comment Change Controller Reference DEFLATE COMMON Mandatory to implement IESG [RFC 8054] Licensing Terms