Friday, May 3, 2019

HTTP Squid Proxy Server - DNS Leaks

Hi all,

I am running a Squid Proxy server using HTTP on an AWS EC2 Instance that I connect to remotely from my home network. In the Squid conf I have specified a non-ISP/privacy-oriented DNS server also with the use hosts file option enabled. On neither server-side or client-side is my ISP configured as the target DNS server.

When doing Extended tests on https://dnsleaktest.com, the correct DNS server is being used, however when using https://dnsleak.com, my ISP is being shown.

I am struggling to work out why this DNS leak is happening when no where my ISP is being configured as the used DNS server and why one website shows different results to the other.

Any information would be great, TIA!



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