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What is a DNS leak and why should I care?

When using an anonymity or privacy service, it is extremely important that all traffic originating from your computer is routed through the anonymity network. If any traffic leaks outside of the secure connection to the network, any adversary monitoring your traffic will be able to log your activity.

DNS or the domain name system is used to translate domain names such as www.privacyinternational.org into numerical IP addresses e.g. 123.123.123.123 which are required to route packets of data on the Internet. Whenever your computer needs to contact a server on the Internet, such as when you enter a URL into your browser, your computer contacts a DNS server and requests the IP address. Most Internet service providers assign their customers a DNS server which they control and use for logging and recording your Internet activities.

Under certain conditions, even when connected to the anonymity network, the operating system will continue to use its default DNS servers instead of the anonymous DNS servers assigned to your computer by the anonymity network. DNS leaks are a major privacy threat since the anonymity network may be providing a false sense of security while private data is leaking.

If you are concerned about DNS leaks, you should also understand transparent DNS proxy technology to ensure that the solution you choose will stop the dns leak.

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What is a "WebRTC leaks"?

WebRTC implement STUN (Session Traversal Utilities for Nat), a protocol that allows to discover the public IP address. To disable it:

• Mozilla Firefox: Type "about:config” in the address bar. Scroll down to “media.peerconnection.enabled”, double click to set it to false.
• Google Chrome: Install Google official extension WebRTC Network Limiter.

What is a "DNS leaks"?

In this context, with "DNS leak" we mean an unencrypted DNS query sent by your system OUTSIDE the established VPN tunnel.

Why my system suffers DNS leaks?

In brief: Windows lacks the concept of global DNS. Each network interface can have its own DNS. Under various circumstances, the system process svchost.exe will send out DNS queries without respecting the routing table and the default gateway of the VPN tunnel, causing the leak.

Should I be worried for a DNS leak?

If you don't want that your ISP, and anybody with the ability to monitor your line, knows the names your system tries to resolve (so the web sites you visit etc.) you must prevent your system to leak DNS. If you feel that you're living in a human rights hostile country, or in any way the above mentioned knowledge may harm you, you should act immediately to stop DNS leaks.

How Does Torrent Detection Work?

To detect data from your torrent client we provide a magnet link to a fake file. The magnet contains an http url of a controlled by us tracker which archives the information coming from the torrent client.

from https://ipleak.net