testcookie-nginx-module

NGINX module for L7 DDoS attack mitigation

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Description

testcookie-nginx-module is a simple robot mitigation module using cookie based challenge/response technique.

Challenge cookies can be set using different methods:

"Set-Cookie" + 307/302 HTTP Location redirect
"Set-Cookie" + HTML meta refresh redirect

Custom template, JavaScript can be used here.

To prevent automatic parsing, challenge cookie value can be encrypted with AES-128 in CBC mode using custom/random key and iv, and then decrypted at client side with JavaScript using SlowAES.

If you need Captcha or Flash, check testcookie-flash-processor for extension example.

Support the project

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Bugs

Feel free to report bugs and send patches to eldar@kyprizel.net or using github's issue tracker.

Copyright & License

This module is licenced under the terms of BSD license.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

*   Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*   Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
*   Neither the name of the authors nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.