Preventing a DNS Leak and WebRTC Leak when using Tor in Linux
Using Tor alone will not prevent the so-called DNS Leak problem. If your Web browser is not configured correctly your Linux installation will still use your ISP’s DNS servers instead of the DNS servers favoured by Tor, in which case your ISP will know which sites you are accessing. The Tor Browser takes measures to try and avoid DNS leakage, but it is also possible to configure Firefox yourself if you prefer to use Firefox with Tor.
Furthermore, now that WebRTC is incorporated in some browsers, a ‘WebRTC Leak‘ is also possible if you have not configured your browser correctly.
This articlegives some tips on how to avoid a DNS Leak and WebRTC Leak when using Firefox with Tor, along with a Bash script that can be used to toggle the relevant Firefox user preferences before and after using Firefox, which makes the process easier.
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