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FPDNS(1)	      User Contributed Perl Documentation	      FPDNS(1)

NAME
       fpdns - DNS server fingeprinting tool

SYNOPSIS
       fpdns [ -d ] [ -f ] [ -F nchild ]
	  [ -p port ] [ -Q srcaddr ] [ -r retry ]
	  [ -s ]  [ -S separator ] [ -t timeout ] [ -v ] [server(s)]

DESCRIPTION
       fpdns is a program that remotely determines DNS server versions.	 It
       does this by sending a series of borderline DNS queries which are
       compared against a table of responses and server versions.

       False positives or incorrect versions may be reported when trying to
       identify a set of servers residing behind a load-balancing apparatus
       where the servers are of different implementations, when a specific
       implementation behaves like a forwarder, behind a firewall without
       statefull inspection or without Application Intelligence.

OPTIONS
       -d   Enable debugging. Off by default.

       -D   Check all authoritative servers of the specified domain name.

       -f   Force checking of CH TXT version. Off by default.

       -F nchild
	    Maximum number of forked child processes. Defaults to 10.

       -p port
	    Port to query remote nameserver on. Default is 53.

       -Q srcaddr
	    Set the source IP address to use.

       -r retry
	    Number of attempt to retry fingerprints. Defaults to 1.

       -s   Short display form. Useful for surveys.

       -S   Separator. Defaults to " ".

       -t timeout
	    Set the query timeout in seconds. Defaults to 5.

       -T   Use TCP instead of UDP.

       -v   Show version of fpdns.

       server
	    IP address or name to query. Alternatively may be '-' to read from
	    a list of these from stdin

AUTHORS
       fpdns was written by Roy Arends and Jakob Schlyter.

SEE ALSO
       perl(1), Net::DNS(1)

perl v5.20.2			  2012-10-19			      FPDNS(1)

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