PeerGuardian is a privacy oriented firewall application. It blocks connections to and from hosts specified in huge blocklists (thousands or millions of IP ranges). Its origin seeds in targeting aggressive IPs while you use P2P.

PeerGuardian Linux:
Actively developed. However the team is very small and with few spare time. Contributors are welcome!

Peerguardian OS X:
Not developed anymore. We've lost contact with the OS X developer. New contributors are welcome!

PeerGuardian Windows:
Not developed anymore. It's highly recommended to use PeerBlock instead, which is a continuation of PeerGuardian's development in Windows, with bug fixes and support for Windows Vista and Windows 7.
New contributors and/or collaboration with are welcome!

PeerGuardian is an open project. Not only is its source code open for you to read, use, and modify - but the project is open for you to join and contribute in any form (code, documentation, bug reports, web and support).

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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5

User Reviews

  • thanks for this. used it when i was windows years ago, nice to see it lives on as linux! long live linux! thank you for the deb repo!

  • *****

  • p.s. If it still doesn't seem to work after this update, try "Quit Helpers", "Quit" and then relaunch. The kernel extension version should be 1.1.13: $ kextstat | grep xxx 233 0 0xffffff7f8292d000 0x5000 0x5000 xxx.qnation.PeerGuardian (1.1.13) <5 4 3 1>

  • Thanks for Peerguardian, it's good!

    1 user found this review helpful.
  • Peerguardian is wonderful! Thanks.

    1 user found this review helpful.
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Additional Project Details

Intended Audience

End Users/Desktop

User Interface

Win32 (MS Windows), KDE, Non-interactive (Daemon), Curses/Ncurses

Programming Language

C++, C

Database Environment