Dns Leak Test

The test shows DNS leaks and your external IP. If you use the same ASN for DNS and connection - you have no leak, otherwise here might be a problem.

Linux & macOS

How to install & use Bash Version

Please, before use make sure you have curl and ping installed.

1. Download dnsleaktest.sh

curl https://raw.githubusercontent.com/macvk/dnsleaktest/master/dnsleaktest.sh -o dnsleaktest.sh

chmod +x dnsleaktest.sh

2. Run dnsleaktest.sh

./dnsleaktest.sh

How to install & use Python Version

1. Download dnsleaktest.py

curl https://raw.githubusercontent.com/macvk/dnsleaktest/master/dnsleaktest.py -o dnsleaktest.py

chmod +x dnsleaktest.py

2. Run dnsleaktest.py

./dnsleaktest.py

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Windows

How to install & use batch file

1. Download dnsleaktest.bat

powershell -command "& { (New-Object Net.WebClient).DownloadFile('https://raw.githubusercontent.com/macvk/dnsleaktest/master/dnsleaktest.bat', 'dnsleaktest.bat') }"

2. Run dnsleaktest.bat

dnsleaktest.bat

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How to build & use Golang Version

You can use prebuilt executable binary for Linux, MacOs or Windows created by travis-ci.org:

Linux & macOS

1. Download dnsleaktest v1.3

chmod +x dnsleaktest

2. Run dnsleaktest

./dnsleaktest

Windows

1. Download dnsleaktest.exe v1.3

2. Run dnsleaktest.exe, open cmd then navigate to the exe file

dnsleaktest.exe

Or build binaries in your machine

1. Linux & macOS

GOOS=linux GOARCH=386 go build -o dnsleaktest dnsleaktest.go

2. Windows

GOOS=windows GOARCH=386 go build -o dnsleaktest.exe dnsleaktest.go

How to run from Docker

Linux

Use host networking so the test sees the host's network stack and DNS configuration. This is important when the host uses a local DNS resolver such as systemd-resolved or NextDNS.

docker run --rm --network host python:alpine sh -c 'wget -q -O- https://raw.githubusercontent.com/macvk/dnsleaktest/master/dnsleaktest.py | python'

macOS and Windows

Docker Desktop runs containers in a virtual machine, so host networking does not provide the same view of the host's DNS configuration as it does on Linux. The following command tests the DNS configuration visible inside the container:

docker run --rm python:alpine sh -c 'wget -q -O- https://raw.githubusercontent.com/macvk/dnsleaktest/master/dnsleaktest.py | python'