Dnswalk

Description

Dnswalk is a DNS debugger. It performs zone transfers of specified domains, and checks the database in numerous ways for internal consistency, as well as accuracy. dnswalk requires perl and the Net::DNS Perl package. If you do not have these, get them. (perl is assumed to be in /usr/local/bin, edit the first line of dnswalk if it is not)

Usage

Options

-r     Recursively descend sub-domains of the specified domain.
-a     Turn on warning of duplicate A records.
-d     Print debugging and ‘status’ information to stderr.  (Use only if redirecting stdout).
-m     Perform checks only if the zone has been modified since the previous run.
-F     Perform  “fascist”  checking.  When checking an A record, compare the PTR name for each IP address with the forward         name and report mismatches.
-i     Suppress check for invalid characters in a domain name.
-l     Perform  “lame  delegation”  checking.   For every NS record, check to see that the listed host is  indeed returning authoritative answers for this domain.

Example

cyborg@cyborg:~$ dnswalk -d ztrela.com.
Checking ztrela.com.
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