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Hi there, I'm Sergey Brester aka sebres.
People said that I can code with both hands tied behind my back (no matter what, from rewrite a Linux kernel or inject into Windows core, up to scripting of some asynchronous multi-tasking big-data task with embedding directly in a running database service)... and I must admit it is true.
My preferred langs are c, asm, c++, c#, tcl, python, ruby, but also js, php, java, scala, etc.
If I get time to open source, the main contribution belongs to:
  • TCL and its libraries and modules, and some other languages;
  • Fail2Ban (where I'm also key developer at the moment);
  • nginx, its modules and bindings, but also many other open-source projects.
If you like my job, here you can support it -

(since 2021)
profile for sebres on Stack Exchange, a network of free, community-driven Q&A sites


  1. Daemon to ban hosts that cause multiple authentication errors

    Python 7.7k 1.1k

  2. nginx Public

    nginx web and reverse proxy server / sebres-mod (original source code as mercurial repository is located at, official gihub mirror at

    C 12 3

  3. tcl Public

    Forked from tcltk/tcl

    The Tcl Core.

    C 1

  4. tclthread Public

    Forked from tcltk/thread

    Mirror from thread @

    C 1

  5. tclclockmod Public

    Tcl clock extension: faster Tcl-module for the replacement of the standard "clock" ensemble of tcl

    C 5 9

  6. A portable foreign-function interface library.

    C 2.7k 612

181 contributions in the last year

Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Mon Wed Fri
Activity overview
Contributed to fail2ban/fail2ban, tcltk/tcl, sebres/tdom and 4 other repositories

Contribution activity

December 2022

Answered 1 discussion in 1 repository

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