This set of two small utilities I’ve written can be used to tunnel binary data over HTTP by the usage of HTML pages that appear normal to most machines.
Thus, firewalls can be avoided since most data going through port 80 is relatively unfiltered.
Of course, these two small programs are only part of the cure. The source code can be used in more sophisticated solutions. They’re written in portable ANSI C, and have a BSD license (so, use in commercial applications and/or organizations is expressly permitted).
Source code (.tar.gz format)
Source code (.zip format)
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