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

6       fpdns - DNS server fingeprinting tool
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SYNOPSIS

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

14       fpdns is a program that remotely determines DNS server versions.  It
15       does this by sending a series of borderline DNS queries which are
16       compared against a table of responses and server versions.
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18       False positives or incorrect versions may be reported when trying to
19       identify a set of servers residing behind a load-balancing apparatus
20       where the servers are of different implementations, when a specific
21       implementation behaves like a forwarder, behind a firewall without
22       statefull inspection or without Application Intelligence.
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OPTIONS

25       -d   Enable debugging. Off by default.
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27       -D   Check all authoritative servers of the specified domain name.
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29       -f   Force checking of CH TXT version. Off by default.
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31       -F nchild
32            Maximum number of forked child processes. Defaults to 10.
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34       -p port
35            Port to query remote nameserver on. Default is 53.
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37       -Q srcaddr
38            Set the source IP address to use.
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40       -r retry
41            Number of attempt to retry fingerprints. Defaults to 1.
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43       -s   Short display form. Useful for surveys.
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45       -S   Separator. Defaults to " ".
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47       -t timeout
48            Set the query timeout in seconds. Defaults to 5.
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50       -T   Use TCP instead of UDP.
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52       -v   Show version of fpdns.
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54       server
55            IP address or name to query. Alternatively may be '-' to read from
56            a list of these from stdin
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AUTHORS

59       fpdns was written by Roy Arends and Jakob Schlyter.
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SEE ALSO

62       perl(1), Net::DNS(1)
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66perl v5.38.0                      2023-07-19                          FPDNS(1)
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