Console proxy/socks4/socks5 checker (multithreaded 10 thousand-50 thousand). Streams) for Debian/Centos. Which programming language is it, I don’t know. I guess it will be a pearl or a python (more likely the second). If you think that the checker can be implemented “on something else” and it will be better, offer a checker. With proposals "I will take" without specifics - it is better not to address! Payment for Yandex money or Visa, for the performance of work.