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Realmrinetd
Free

Free and open source under the MIT licence.

 Free

Free and open source under GPL-2.0-or-later.

Windows, Linux, Self-hosted, Command line Windows, Linux, Command line
  • Starts a relay with a single command
  • Concurrent bidirectional forwarding
  • Forwards TCP and UDP connections between addresses and ports
  • Includes configuration files and a manual page
  • Command-line only, with no graphical interface
  • Documentation is mostly in the repository readme
  • Configured and operated from the command line
Downloadable app, Self-hosted Downloadable app
Open source Open source
License: MIT License: GPL-2.0-or-later
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.