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Brandenads (talk | contribs) →Visual Output Simulation: capitalization |
→top: Changed wording slightly to make it sound more natural. Tags: Mobile edit Mobile app edit Android app edit |
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{{one source|date=October 2015}}
{{IPstack}}
The '''Character Generator Protocol''' ('''CHARGEN''') is a service of the [[Internet Protocol Suite]] defined in {{IETF RFC|864}} in 1983 by [[Jon Postel]]. It is intended for testing, debugging, and measurement purposes. The protocol is rarely used, as its design flaws allow for ready misuse.<ref>{{Cite web|url=https://nvd.nist.gov/vuln/detail/CVE-1999-0103|title=NVD - CVE-1999-0103|website=nvd.nist.gov|access-date=2018-02-05}}</ref>
A host may connect to a server that supports the Character Generator Protocol on either [[Transmission Control Protocol]] (TCP) or [[User Datagram Protocol]] (UDP) [[port number]] 19. Upon opening a TCP connection, the server starts sending arbitrary characters to the connecting host and continues until the host closes the connection. In the UDP implementation of the protocol, the server sends a UDP datagram containing a random number (between 0 and 512) of characters every time it receives a datagram from the connecting host. Any data received by the server is discarded.
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