The ports version of dns/fpdns seems to have this[1] bug: $ fpdns ns1.isc-sns.net. Net::DNS::Header::data: no such method at /usr/local/lib/perl5/site_perl/5.16.0/Net/DNS/Fingerprint.pm line 668. [1] https://bugzilla.redhat.com/show_bug.cgi?id=830449 -- Greg Rivers