dnstracer

DNS delegation tracing tool

TLDR

Trace DNS resolution path

$ dnstracer [www.example.com]

Start with specific DNS server

$ dnstracer -s [dns.example.org] [www.example.com]

Query IPv4 servers only

$ dnstracer -4 [www.example.com]

Retry failed requests 5 times

$ dnstracer -r [5] [www.example.com]

Display all steps

$ dnstracer -v [www.example.com]

Display overview of answers

$ dnstracer -o [www.example.com]

dnstracer determines where a DNS server gets its information from by tracing the DNS resolution path from root servers down to the authoritative nameserver.Useful for debugging DNS issues and understanding DNS delegation.

PARAMETERS

-s server

Start with specified DNS server

-4

Only query IPv4 servers

-6

Only query IPv6 servers

-r count

Number of retries on failure

-v

Verbose output

-o

Overview of all received answers

INSTALL

sudo apt install dnstracer

sudo dnf install dnstracer

sudo apk add dnstracer

sudo zypper install dnstracer

brew install dnstracer

nix profile install nixpkgs#dnstracer

CAVEATS

Requires network access to DNS servers. Tracing may take time for complex delegations. Some DNS servers may block tracing queries.

RESOURCES

Homepage