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dnstrace(1)		    General Commands Manual		   dnstrace(1)

NAME
       dnstrace	- dns lookup tool

SYNOPSIS
       dnstrace	t fqdn r

DESCRIPTION
       dnstrace	searches for all DNS servers that can affect the resolution of
       records of type t under the domain name fqdn, starting  from  the  root
       server r.  You can list more than one root server.

       dnstrace	 uses  the  standard DNS resolution algorithm, but follows all
       possible	paths in the algorithm.	 It prints all responses  it  receives
       from  DNS  servers;  it	also  prints warnings about slow servers, dead
       servers,	misdelegated (``lame'')	 servers,  and	misformatted  packets.
       dnstrace	 is  similar in	spirit to DOC and dnswalk but is much more ef-
       fective than those tools	at debugging resolution	problems.

       In versions 1.03	and above: You can  pipe  dnstrace  through  dnstrace-
       sort(1)	for  human-friendly  output.  dnstrace can take	a long time to
       run, so standard	procedure is to	save its output	in a file:

	 dnstrace any www.aol.com a.root-servers.net > AOL &

       Then you	can run	dnstracesort(1)	to see the results so far:

	 dnstracesort <	AOL | less

       The dnstracesort(1) output uses ul codes	for  boldface  and  underline;
       these codes are displayed properly by less(1).

       Beware  that,  as  of  January  2001,  dnstrace	produces  more	than 5
       megabytes of output for the complete trace of  cr.yp.to	starting  from
       all  the	 root  servers.	  It ends up sending more than 6000 queries to
       more than 200 different servers.

SEE ALSO
       dnsip(1),   dnsipq(1),	dnsmx(1),   dnstxt(1),	 dnsqr(1),    dnsq(1),
       dnsname(1), less(1), tinydns-get(1)

       http://cr.yp.to/djbdns.html

								   dnstrace(1)

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO

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