When you do a DNS request, which DNS server is used? This tool will tell you. It does a DNS request while doing a packet capture and gets the DNS server that replied.

Warning: Requires root access since it does a packet capture while doing the dns requests.

sudo ./whichdns

sudo ./whichdns --iponly

Needs pcap to build

dnf install libpcap-devel

apt install libpcap-dev

CGO_ENABLED=1 go build

Default interface: wlp4s0
2024/03/11 22:16:18 Making DNS requests
2024/03/11 22:16:18 DNS request made.
2024/03/11 22:16:18 DNS response from: 192.168.178.21

Contributions are always welcome! All contributions are required to follow the https://google.github.io/styleguide/go/

Please report any security vulnerabilities to the project using issues or directly to the owner.

This project follows the go project code of conduct, please refer to https://go.dev/conduct for more details

• add options to return just the dns server for use in scripts

• @earentir

I will always follow the Linux Kernel License as primary, if you require any other OPEN license please let me know and I will try to accomodate it.