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tldr/pages/common/dnswalk.md
Kristopher a49cfcb166
dnswalk: add page (#16968)
Co-authored-by: Managor <42655600+Managor@users.noreply.github.com>
Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: Dylan <145150333+dmmqz@users.noreply.github.com>
2025-07-07 15:34:30 +02:00

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# dnswalk
> DNS debugger.
> "Walk" across zones and validate database consistency and best practices.
> More information: <https://manned.org/dnswalk>.
- Debug a DNS pathway for a Fully Qualified Domain Name (FQDN):
`dnswalk {{domain}}.`
- Process sub-domains [r]ecursively:
`dnswalk -r {{domain}}.`
- Only perform a `dnswalk` if the zone has been [m]odified since the last run:
`dnswalk -m {{domain}}.`
- Print [d]ebugging and status information to `stderr` instead of `stdout`:
`dnswalk -d {{domain}}.`
- Suppress the check for [i]nvalid characters in the domain name:
`dnswalk -i {{domain}}.`
- Enable duplicate A record warnings:
`dnswalk -a {{domain}}.`
- Enable "[F]ascist checking" to compare the A record PTR name with the forward name and report mismatches:
`dnswalk -F {{domain}}.`
- Enable "[l]ame delegation" to test whether the listed host is returning authoritative answers:
`dnswalk -l {{domain}}.`