catflap 1.0.1
A simple solution to provide on-demand service access (e.g. port 80 on webserver), where a more robust and secure VPN solution is not available. Essentially, it is a more user-friendly form of "port knocking". The original proof-of-concept implementation was run for almost three years by Demotix, to protect development and staging servers from search engine crawlers and other unwanted traffic.
Gemfile:
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install:
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Runtime Dependencies (1):
json
>= 1.8.3
Requirements:
NetFilters (iptables) installed and working.