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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}}.