Overview of dnswalk
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.
You can get the information about the dnswalk tool by executing the following command, there are many tools included in dnswalk and can be run by using deference switches.
-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.
dnswalk Usage Example
When you are running dnswalk command then you will have to put “.” (d0t) in the end of the domain name for example if the domain name is cyberpedia.in you have to specify cyberpedia.in. Zone transfer is disabled by default in most of domains and can be enabled by administrator. Here is the result disabled zone transfer domain.
If zone transfer is disabled then you can use -f switch to transfer zone forceful.
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