IRC

IRC. Internet Relay Chat is a text-based real-time Internet communication protocol designed for group discussions in channels, as well as one-to-one conversations. It was created in 1988 by Finnish student Jarkko Oikarinen to extend the functionality of a BBS program called OuluBox. The protocol facilitated the rise of a global, decentralized social network long before the advent of modern social media platforms, becoming instrumental in software development coordination, technical support, and real-time event coverage.

History

The development of the protocol began at the University of Oulu where Oikarinen was inspired by existing multi-user chat systems like Bitnet Relay and the talk command on Unix systems. Its popularity exploded in the early 1990s with its use during major world events, such as providing real-time updates during the Gulf War and the 1991 Soviet coup d'état attempt. The Internet Engineering Task Force formalized the protocol with RFC 1459 in 1993. Key networks like EFnet, IRCnet, and Undernet formed from early splits in the original network, leading to a diverse ecosystem. The protocol played a crucial role in the development of the open-source software movement, with projects like the Linux kernel and Mozilla Firefox using it for developer coordination.

Technical details

The protocol operates on a client–server model, where users connect to a server that is part of a larger network. Communication is organized into named channels, which are prefixed by symbols like the number sign, and support various modes for moderation and privacy. Core commands, such as those for joining channels and sending private messages, are standardized. Servers connect to each other to form a network, synchronizing channel and user information using protocols defined in specifications like the IRCd server software. The original protocol lacked native support for features like file transfer, which were later handled by auxiliary protocols like Direct Client-to-Client.

Usage and culture

It became a cornerstone of early Internet culture, fostering communities around diverse topics from hacking and philosophy to fan fiction and technical support for operating systems like Linux. Its real-time nature made it ideal for live interaction during Internet radio broadcasts and early esports tournaments. Distinct social norms, jargon, and etiquette developed, including the use of bots for channel management and automated services. Major events, from Linux release parties to coordination for projects like the Wikipedia website, were organized through its channels. The protocol also saw significant use in the warez scene and by hacktivist groups like Anonymous.

Clients and software

Users access networks through a wide variety of client software, ranging from traditional text-based clients like Irssi and WeeChat to graphical clients such as mIRC for Windows, Textual for macOS, and HexChat for Linux. Server software, primarily IRCd and its forks like UnrealIRCd and InspIRCd, implements the network protocol. Specialized software includes BNCs for maintaining persistent connections and sophisticated bots like Supybot for channel automation. Modern bridges and web-based clients like Kiwi IRC have been developed to integrate with platforms like Slack and Discord.

Security and issues

The protocol's original design lacked modern security features, making it vulnerable to a range of attacks including packet injection, denial-of-service attacks, and eavesdropping due to a lack of mandatory encryption. This led to the development of extensions like Transport Layer Security for securing connections. Persistent issues include the disruptive behavior of trolls and spambots, often mitigated by network operators or ChanServ-style services. The decentralized nature of different networks, such as Freenode and QuakeNet, means security policies and enforcement vary widely. The rise of proprietary alternatives like Discord and Slack has challenged its relevance, though it remains in use for specific technical and community purposes.

Category:Internet protocols Category:Application layer protocols Category:Chat websites Category:Internet Relay Chat Category:1988 software