Tag Archives: Squid

April Fools Pranks with a Squid Proxy Server

Introduction Note: This guide was tested using Ubuntu Server 14.04.4 LTS. This is a HowTo for setting up Upside-Down-Ternet on Ubuntu. Basically, when a user browses the web, all the images are flipped upside-down. While it's not useful, it's quite a good April Fool's prank. The process uses a transparent proxy, web server, and script to flip the images. Web traffic is routed to the proxy, instead of the default gateway, which is intercepted by the proxy which then downloads and modifies the images and then serves them back to the client browser. Setting up the Proxy The proxy used in this guide is Squid v3.3.8. The IP of this server is 192.168.113.253. Installation Configuration Edit the configuration file located in…

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