Dnstracer

Description

Dnstracer determines where a given Domain Name Server (DNS) gets its information from for a given hostname, and follows the chain of DNS servers back to the authoritative answer.

Source: http://www.mavetju.org/unix/general.php

Usage

Syntax

dnstracer [options] [host]

Options

        -c: disable local caching, default enabled
	-C: enable negative caching, default disabled
	-o: enable overview of received answers, default disabled
	-q <querytype>: query-type to use for the DNS requests, default A
	-r <retries>: amount of retries for DNS requests, default 3
	-s <server>: use this server for the initial request, default localhost
	             If . is specified, A.ROOT-SERVERS.NET will be used.
	-t <maximum timeout>: Limit time to wait per try
	-v: verbose
	-S <ip address>: use this source address.
	-4: don't query IPv6 servers

Example

cyborg@cyborg:~$ dnstracer -r 3 -v example.com
Tracing to example.com[a] via 192.168.1.1, maximum of 3 retries
192.168.1.1 (192.168.1.1) IP HEADER
- Destination address:  192.168.1.1
DNS HEADER (send)
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