Security tool · recon
dnsx
Fast, multi-purpose DNS toolkit: resolve, probe records, and filter live hosts from a subdomain list.
Overview
Where dnsx fits
Fast, multi-purpose DNS toolkit: resolve, probe records, and filter live hosts from a subdomain list.
Detection-first use
Start with the least intrusive template that can distinguish your hypothesis from a normal response. Preserve raw output and a negative control.
Install
Installation references
Install with goAuthorization required
go install -v github.com/projectdiscovery/dnsx/cmd/dnsx@latest- Positive signal
- Tool-specific output that supports the stated hypothesis.
- Negative control
- No result, or identical behavior against a known-safe control.
- Intrusiveness
- Review flags and target scope before execution.
Install with pdtmAuthorization required
pdtm -i dnsx- Positive signal
- Tool-specific output that supports the stated hypothesis.
- Negative control
- No result, or identical behavior against a known-safe control.
- Intrusiveness
- Review flags and target scope before execution.
Test safely
Command templates
Resolve liveAuthorization required
Populate placeholders only with assets that are explicitly in scope.
dnsx -l {input} -silent -o {output}- Positive signal
- Tool-specific output that supports the stated hypothesis.
- Negative control
- No result, or identical behavior against a known-safe control.
- Intrusiveness
- Review flags and target scope before execution.
A + CNAME recordsAuthorization required
Populate placeholders only with assets that are explicitly in scope.
dnsx -l {input} -a -cname -resp- Positive signal
- Tool-specific output that supports the stated hypothesis.
- Negative control
- No result, or identical behavior against a known-safe control.
- Intrusiveness
- Review flags and target scope before execution.
Related
Continue the workflow
Sources
Attribution and verification
Version history: normalized permanent page created 2026-08-20. Upstream activity and popularity are separate signals and do not establish tool safety.