FidoNet

Origins There are two major accounts of the development of the FidoNet, differing only in small details. Tom Jennings' account Around Christmas 1983, Tom Jennings started work on a new bulletin board system that would emerge as Fido BBS. It was called "Fido" because the assorted hardware together was "a real mongrel". Jennings set up the system in San Francisco sometime in early 1984. Another early user was John Madill, who was trying to set up a similar system in Baltimore on his Rainbow 100. Fido started spreading to new systems, and Jennings eventually started keeping an informal list of their phone numbers, with Jennings becoming #1 and Madill #2. Jennings released the first version of the FidoNet software in June 1984. In early 1985 he wrote a document explaining the operations of the FidoNet, along with a short portion on the history of the system. In this version, FidoNet was developed as a way to exchange mail between the first two Fido BBS systems, Jennings' and Madill's, to "see if it could be done, merely for the fun of it". This was first supported in Fido V7, "sometime in June 84 or so". Ben Baker's account In early 1984, Ben Baker was planning on starting a BBS for the newly forming computer club at the McDonnell Douglas automotive division in St. Louis. Baker was part of the CP/M special interest group within the club. He intended to use the seminal, CP/M-hosted, CBBS system, and went looking for a machine to run it on. The club's president told Baker that DEC would be giving them a Rainbow 100 computer on indefinite loan, so he made plans to move the CBBS onto this machine. The Rainbow contained two processors, an Intel 8088 and a Zilog Z80, allowing it to run both MS-DOS and CP/M, with the BBS running on the latter. When the machine arrived, they learned that the Z80 side had no access to the I/O ports, so CBBS could not communicate with a modem. While searching for software that would run on the MS-DOS side of the system, Baker learned of Fido through Madill. In order to lower long-distance charges, the mail exchanges were timed to run late at night, normally 4 AM. From then on, joining FidoNet required one to set up their system and use it to deliver a netmail message to a special system, Node 51. The message contained various required contact information. If this message was transmitted successfully, it ensured that at least some of the system was working properly. The nodelist team would then reply with another netmail message back to the system in question, containing the assigned node number. If delivery succeeded, the system was considered to be working properly, and it was added to the nodelist. A complete network address would now consist of the network and node number pair, which would be written with a slash between them. All mail travelling between networks would first be sent to their local network host, someone who volunteered to pay for any long-distance charges. That single site would collect up all the netmail from all of the systems in their network, then re-package it into single packets destined to each network. They would then call any required network admin sites and deliver the packet to them. That site would then process the mail as normal, although all of the messages in the packet would be guaranteed to be local calls. the various parties hammered out all of the details of the new concept. As part of this meeting, they also added the concept of a region, a purely administrative level that was not part of the addressing scheme. Regional hosts would handle any stragglers in the network maps, remote systems that had no local network hosts. They then divided up the US into ten regions that they felt would have roughly equal populations. Over time, this information was folded into updated versions of the nodelist format, and the ROUTES file is no longer used. A new version of FIDO and FIDONET, 10C, was released containing all of these features. On 12 June 1985 the core group brought up 10C, and most Fido systems had upgraded within a few months. In February 1986 Jeff Rush, one of the group members, introduced a new mailer that extracted messages from public forums that the sysop selected, similar to the way the original mailer handled private messages. The new program was known as a tosser/scanner. The tosser produced a file that was similar (or identical) to the output from the normal netmail scan, but these files were then compressed and attached to a normal netmail message as an attachment. This message was then sent to a special address on the remote system. After receiving netmail as normal, the scanner on the remote system looked for these messages, unpacked them, and put them into the same public forum on the original system. In this fashion, Rush's system implemented a store and forward public message system similar to Usenet, but based on, and hosted by, the FidoNet system. The first such echomail forum was one created by the Dallas area sysops to discuss business, known as SYSOP. Another called TECH soon followed. Several public echos soon followed, including GAYNET and CLANG. These spawned hundreds of new echos, and led to the creation of the Echomail Conference List (Echolist) by Thomas Kenny in January 1987. Echomail produced world-spanning shared forums, and its traffic volume quickly surpassed the original netmail system. By the early 1990s, echo mail was carrying over 8 MB of compressed message traffic a day, many times that when uncompressed. Although FidoNet was, by far, the best known BBS-based network, it was by no means the only one. From 1988 on, PCBoard systems were able to host similar functionality known as RelayNet, while other popular networks included RBBSNet from the Commodore 64 world, and AlterNet. Late in the evolution of the FidoNet system, there was a proposal to allow mail (but not forum messages) from these systems to switch into the FidoNet structure. This was not adopted, and the rapid rise of the internet made this superfluous as these networks rapidly added internet exchange, which acted as a lingua franca. Peak FidoNet started in 1984 and listed 100 nodes by the end of that year. Steady growth continued through the 1980s, but a combination of factors led to rapid growth after 1988. These included faster and less expensive modems and rapidly declining costs of hard drives and computer systems in general. By April 1993, the FidoNet nodelist contained over 20,000 systems. At that time it was estimated that each node had, on average, about 200 active users. Of these 4 million users in total, 2 million users commonly used echomail, the shared public forums, while about 200,000 used the private netmail system. Throughout its lifetime, FidoNet was beset with management problems and infighting. Much of this can be traced to the fact that the inter-net delivery cost real money, and the traffic grew more rapidly than decreases caused by improving modem speeds and downward trending long-distance rates. As they increased, various methods of recouping the costs were attempted, all of which caused friction in the groups. The problems were so bad that Jennings came to refer to the system as the "fight-o-net". Decline As modems reached speeds of 28.8 kbit/s, dial-up Internet became increasingly common. By 1995, the bulletin board market was reeling as users abandoned local BBS systems in favour of a subscription to a local Internet Provider, which allowed access to worldwide internet services, such as HTTP, internet mail and so on, for the same cost as accessing a local BBS system. Many BBS sysops became Internet Service Providers. Their Internet gateways also made FidoNet less expensive to implement, because inter-net transfers could be delivered over the Internet as well, at little or no marginal cost. But this seriously diluted the entire purpose of the store-and-forward model, which had been built up specifically to address a long-distance problem that no longer existed. The FidoNet nodelist started shrinking, especially in areas with a widespread availability of internet connections. This downward trend continues but has levelled out at approximately 2,500 nodes. FidoNet remains popular in areas where Internet access is difficult to come by, or expensive. Resurgence Around 2014, a retro movement led to a slow increase in internet-connected BBS and nodes. Telnet, rlogin, and SSH are being used between systems. This means the user can telnet to any BBS worldwide as cheaply as ones next door. Also, Usenet and internet mail has been added, along with long file names to many newer versions of BBS software, some being freeware, resulting in increasing use. Nodelists are no longer declining in all cases. ==FidoNet organizational structure==

FidoNet is governed in a hierarchical structure according to FidoNet policy, with designated coordinators at each level to manage the administration of FidoNet nodes and resolve disputes between members. The rules of conduct are summed up into these two deliberately vague principles: • Thou shalt not excessively annoy others. • Thou shalt not be too easily annoyed. Network coordinators are responsible for managing the individual nodes within their area, usually a city or similar sized area. Regional coordinators are responsible for managing the administration of the network coordinators within their region, typically the size of a state, or small country. Zone coordinators are responsible for managing the administration of all of the regions within their zone. The world is divided into six zones, the coordinators of which elect one of themselves to be the International Coordinator of FidoNet. ==Technical structure==

FidoNet was historically designed to use modem-based dial-up access between bulletin board systems, and much of its policy and structure reflected this. The FidoNet system officially referred only to the transfer of Netmail—the individual private messages between people using bulletin boards—including the protocols and standards with which to support it. A netmail message would contain the name of the person sending, the name of the intended recipient, and the respective FidoNet addresses of each. The FidoNet system was responsible for routing the message from one system to the other (details below), with the bulletin board software on each end being responsible for ensuring that only the intended recipient could read it. Due to the hobbyist nature of the network, any privacy between the sender and recipient was only the result of politeness from the owners of the FidoNet systems involved in the mail's transfer. It was common, however, for system operators to reserve the right to review the content of mail that passed through their system. Netmail allowed for the attachment of a single file to every message. This led to a series of piggyback protocols that built additional features onto FidoNet by passing information back and forth as file attachments. These included the automated distribution of files and transmission of data for inter-BBS games. By far the most commonly used of these piggyback protocols was Echomail, public discussions similar to Usenet newsgroups in nature. Echomail was supported by a variety of software that collected up new messages from the local BBSes' public forums (the scanner), compressed it using ARC or ZIP, attached the resulting archive to a Netmail message, and sent that message to a selected system. On receiving such a message, identified because it was addressed to a particular user, the reverse process was used to extract the messages, and a tosser put them back into the new system's forums. Echomail was so popular that for many users, Echomail was the FidoNet. Private person-to-person Netmail was relatively rare. Geographical structure FidoNet is politically organized into a tree structure, with different parts of the tree electing their respective coordinators. The FidoNet hierarchy consists of zones, regions, networks, nodes and points broken down more-or-less geographically. The highest level is the zone, which is largely continent-based: • Zone 1 is the United States and Canada • Zone 2 is Europe, Former Soviet Union countries, and Israel • Zone 3 is Australasia • Zone 4 is Latin America (except Puerto Rico) • Zone 5 was Africa • Zone 6 was Asia, Israel and the Asian parts of Russia, (which are listed in Zone 2). On 26 July 2007 zone 6 was removed, and all remaining nodes were moved to zone 3. Each zone is broken down into regions, which are broken down into nets, which consist of individual nodes. Zones 7-4095 are used for othernets; groupings of nodes that use Fido-compatible software to carry their own independent message areas without being in any way controlled by FidoNet's political structure. Using un-used zone numbers would ensure that each network would have a unique set of addresses, avoiding potential routing conflicts and ambiguities for systems that belonged to more than one network. FidoNet addresses FidoNet addresses explicitly consist of a zone number, a network number (or region number), and a node number. They are written in the form Zone:Network/Node. The FidoNet structure also allows for semantic designation of region, host, and hub status for particular nodes, but this status is not directly indicated by the main address. For example, consider a node located in Tulsa, Oklahoma, United States with an assigned node number is 918, located in Zone 1 (North America), Region 19, and Network 170. The full FidoNet address for this system would be 1:170/918. The region was used for administrative purposes, and was only part of the address if the node was listed directly underneath the Regional Coordinator, rather than one of the networks that were used to divide the region further. FidoNet policy requires that each FidoNet system maintain a nodelist of every other member system. Information on each node includes the name of the system or BBS, the name of the node operator, the geographic location, the telephone number, and software capabilities. The nodelist is updated weekly, to avoid unwanted calls to nodes that had shut down, with their phone numbers possibly having been reassigned for voice use by the respective telephone company. To accomplish regular updates, coordinators of each network maintain the list of systems in their local areas. The lists are forwarded back to the International Coordinator via automated systems on a regular basis. The International Coordinator would then compile a new nodelist, and generate the list of changes (nodediff) to be distributed for node operators to apply to their existing nodelist. Routing of FidoNet mail In a theoretical situation, a node would normally forward messages to a hub. The hub, acting as a distribution point for mail, might then send the message to the Net Coordinator. From there it may be sent through a Regional Coordinator, or to some other system specifically set up for the function. Mail to other zones might be sent through a Zone Gate. For example, a FidoNet message might follow the path: • 1:170/918 (node) to 1:170/900 (hub) to 1:170/0 (net coordinator) to 1:19/0 (region coordinator) to 1:1/0 (zone coordinator). From there, it was distributed 'down stream' to the destination node(s). Originally there was no specific relationship between network numbers and the regions they reside in. In some areas of FidoNet, most notably in Zone 2, the relationship between region number and network number are entwined. For example, 2:201/329 is in Net 201 which is in Region 20 while 2:2410/330 is in Net 2410 which is in Region 24. Zone 2 also relates the node number to the hub number if the network is large enough to contain any hubs. This effect may be seen in the nodelist by looking at the structure of Net 2410 where node 2:2410/330 is listed under Hub 300. This is not the case in other zones. In Zone 1, things are different. Zone 1 was the starting point and when Zones and Regions were formed, the existing nets were divided up regionally with no set formula. The only consideration taken was where they were located geographically with respect to the region's mapped outline. As net numbers got added, the following formula was used. Region number × 20 Then when some regions started running out of network numbers, the following was also used. Region number × 200 Region 19, for instance, contains nets 380-399 and 3800–3999 in addition to those that were in Region 19 when it was formed. Part of the objective behind the formation of local nets was to implement cost reduction plans by which all messages would be sent to one or more hubs or hosts in compressed form (ARC was nominally standard, but PKZIP is universally supported); one toll call could then be made during off-peak hours to exchange entire message-filled archives with an out-of-town uplink for further redistribution. In practice, the FidoNet structure allows for any node to connect directly to any other, and node operators would sometimes form their own toll-calling arrangements on an ad-hoc basis, allowing for a balance between collective cost saving and timely delivery. For instance, if one node operator in a network offered to make regular toll calls to a particular system elsewhere, other operators might arrange to forward all of their mail destined for the remote system, and those near it, to the local volunteer. Operators within individual networks would sometimes have cost-sharing arrangements, but it was also common for people to volunteer to pay for regular toll calls either out of generosity or to build their status in the community. This ad-hoc system was particularly popular with networks that were built on top of FidoNet. Echomail, for instance, often involved relatively large file transfers due to its popularity. If official FidoNet distributors refused to transfer Echomail due to additional toll charges, other node operators would sometimes volunteer. In such cases, Echomail messages would be routed to the volunteers' systems instead. The FidoNet system was best adapted to an environment in which local telephone service was inexpensive and long-distance calls (or intercity data transfer via packet-switched networks) costly. Therefore, it fared somewhat poorly in Japan, where even local lines are expensive, or in France, where tolls on local calls and competition with Minitel or other data networks limited its growth. Points As the number of messages in Echomail grew over time, it became very difficult for users to keep up with the volume while logged into their local BBS. Points were introduced to address this, allowing technically savvy users to receive the already compressed and batched Echomail (and Netmail) and read it locally on their own machines. To do this, the FidoNet addressing scheme was extended with the addition of a final address segment, the point number. For instance, a user on the example system above might be given point number 10, and thus could be sent mail at the address 1:170/918.10. In real-world use, points are fairly difficult to set up. The FidoNet software typically consisted of a number of small utility programs run by manually edited scripts that required some level of technical ability. Reading and editing the mail required either a "sysop editor" program or a BBS program to be run locally. In North America (Zone 1), where local calls are generally free, the benefits of the system were offset by its complexity. Points were used only briefly, and even then only to a limited degree. Dedicated offline mail reader programs such as Blue Wave, Squiggy and Silver Xpress (OPX) were introduced in the mid-1990s and quickly rendered the point system obsolete. Many of these packages supported the QWK offline mail standard. In other parts of the world, especially Europe, this was different. In Europe, even local calls are generally metered, so there was a strong incentive to keep the duration of the calls as short as possible. Point software employs standard compression (ZIP, ARJ, etc.) and so keeps the calls down to a few minutes a day at most. In contrast to North America, pointing saw rapid and fairly widespread uptake in Europe. Many regions distribute a pointlist in parallel with the nodelist. The pointlist segments are maintained by Net- and Region Pointlist Keepers and the Zone Point List Keeper assembles them into the Zone pointlist. At the peak of FidoNet there were over 120,000 points listed in the Zone 2 pointlist. Listing points is on a voluntary basis and not every point is listed, so how many points there really were is anybody's guess. As of June 2006, there are still some 50,000 listed points. Most of them are in Russia and Ukraine. Technical specifications FidoNet contained several technical specifications for compatibility between systems. The most basic of all is FTS-0001, with which all FidoNet systems are required to comply as a minimum requirement. FTS-0001 defined: • Handshaking - the protocols used by mailer software to identify each other and exchange meta-information about the session. • Transfer protocol (XMODEM) - the protocols to be used for transferring files containing FidoNet mail between systems. • Message format - the standard format for FidoNet messages during the time which they were exchanged between systems. Other specifications that were commonly used provided for echomail, different transfer protocols and handshake methods (e.g.: Yoohoo/Yoohoo2u2, EMSI), file compression, nodelist format, transfer over reliable connections such as the Internet (Binkp), and other aspects. Zone mail hour Since computer bulletin boards historically used the same telephone lines for transferring mail as were used for dial-in human users of the BBS, FidoNet policy dictates that at least one designated line of each FidoNet node must be available for accepting mail from other FidoNet nodes during a particular hour of each day. Zone Mail Hour, as it was named, varies depending on the geographic location of the node, and was designated to occur during the early morning. The exact hour varies depending on the time zone, and any node with only one telephone line is required to reject human callers. In practice, particularly in later times, most FidoNet systems tend to accept mail at any time of day when the phone line is not busy, usually during night. ==FidoNet deployments==

Most FidoNet deployments were designed in a modular fashion. A typical deployment would involve several applications that would communicate through shared files and directories, and switch between each other through carefully designed scripts or batch files. However, monolithic software that encompassed all required functions in one package is available, such as D'Bridge. Such software eliminated the need for custom batch files and is tightly integrated in operation. The preference for deployment was that of the operator and there were both pros and cons of running in either fashion. Arguably the most important piece of software on a DOS-based Fido system was the FOSSIL driver, which was a small device driver which provided a standard way for the Fido software to talk to the modem. This driver needed to be loaded before any Fido software would work. An efficient FOSSIL driver meant faster, more reliable connections. Mailer software was responsible for transferring files and messages between systems, as well as passing control to other applications, such as the BBS software, at appropriate times. The mailer would initially answer the phone and, if necessary, deal with incoming mail via FidoNet transfer protocols. If the mailer answered the phone and a human caller was detected rather than other mailer software, the mailer would exit, and pass control to the BBS software, which would then initialise for interaction with the user. When outgoing mail was waiting on the local system, the mailer software would attempt to send it from time to time by dialing and connecting to other systems who would accept and route the mail further. Due to the costs of toll calls which often varied between peak and off-peak times, mailer software would usually allow its operator to configure the optimal times in which to attempt to send mail to other systems. BBS software was used to interact with human callers to the system. BBS software would allow dial-in users to use the system's message bases and write mail to others, locally or on other BBSes. Mail directed to other BBSes would later be routed and sent by the mailer, usually after the user had finished using the system. Many BBSes also allowed users to exchange files, play games, and interact with other users in a variety of ways (i.e.: node to node chat). A scanner/tosser application, such as FastEcho, FMail, TosScan and Squish, would normally be invoked when a BBS user had entered a new FidoNet message that needed to be sent, or when a mailer had received new mail to be imported into the local messages bases. This application would be responsible for handling the packaging of incoming and outgoing mail, moving it between the local system's message bases and the mailer's inbound and outbound directories. The scanner/tosser application would generally be responsible for basic routing information, determining which systems to forward mail to. In later times, message readers or editors that were independent of BBS software were also developed. Often the System Operator of a particular BBS would use a devoted message reader, rather than the BBS software itself, to read and write FidoNet and related messages. One of the most popular editors in 2008 was GoldED+. In some cases, FidoNet nodes, or more often FidoNet points, had no public bulletin board attached and existed only for the transfer of mail for the benefit of the node's operator. Most nodes in 2009 had no BBS access, but only points, if anything. The original Fido BBS software, and some other FidoNet-supporting software from the 1980s, is no longer functional on modern systems. This is for several reasons, including problems related to the Y2K bug. In some cases, the original authors have left the BBS or shareware community, and the software, much of which was closed source, is no longer supported. Several DOS-based legacy FidoNet Mailers such as FrontDoor, Intermail, MainDoor and D'Bridge from the early 1990s can still be run today under Windows without a modem, by using the freeware NetFoss Telnet FOSSIL driver, and by using a Virtual Modem such as NetSerial. This allows the mailer to dial an IP address or hostname via Telnet, rather than dialing a real POTS phone number. There are similar solutions for Linux such as MODEMU (modem emulator) which has limited success when combined with DOSEMU (DOS emulator). Mail Tossers such as FastEcho and FMail are still used today under both Windows and Linux/DOSEMU. There are several modern Windows-based FidoNet Mailers available today with source code, including Argus, Radius, and Taurus. MainDoor is another Windows-based Fidonet mailer, which also can be run using either a modem or directly over TCP/IP. Two popular free and open source software FidoNet mailers for Unix-like systems are the binkd (cross-platform, IP-only, uses the binkp protocol) and qico (supports modem communication as well as the IP protocol of ifcico and binkp). On the hardware side, Fido systems were usually well-equipped machines, for their day, with quick CPUs, high-speed modems and 16550 UARTs, which were at the time an upgrade. As a Fidonet system was usually a BBS, it needed to quickly process any new mail events before returning to its 'waiting for call' state. In addition, the BBS itself usually necessitated lots of storage space. Finally, a FidoNet system usually had at least one dedicated phone line. Consequently, operating a Fidonet system often required significant financial investment, a cost usually met by the owner of the system. == FidoNet availability ==

While the use of FidoNet has dropped dramatically compared with its use up to the mid-1990s, it is still used in many countries and especially Russia and former republics of the USSR. Some BBSes, including those that are now available for users with Internet connections via telnet, also retain their FidoNet netmail and echomail feeds. Some of FidoNet's echomail conferences are available via gateways with the Usenet news hierarchy using software like UFGate. There are also mail gates for exchanging messages between Internet and FidoNet. Widespread net abuse and e-mail spam on the Internet side has caused some gateways (such as the former 1:1/31 IEEE fidonet.org gateway) to become unusable or cease operation entirely. == FidoNews==

FidoNews is the newsletter of the FidoNet community. Affectionately nicknamed The Snooze, it is published weekly. It was first published in 1984. Throughout its history, it has been published by various people and entities, including the short-lived International FidoNet Association. From January 2002 it has been published by Björn Felten, Sweden. ==See also==