Systat (protocol)

From Infogalactic: the planetary knowledge core
Jump to: navigation, search

Systat or Active Users is a simple Internet protocol ostensibly useful for "debugging and measurement".[1] A connection to port 11, by either TCP or UDP, elicits a list of users currently logged into the system. Though it remains an official Internet protocol, its use is considered a security vulnerability.[2]

References

  1. Postel, J. (May 1983). Active Users. IETF. RFC 866. https://tools.ietf.org/html/rfc866. 
  2. Lua error in package.lua at line 80: module 'strict' not found.