http://code.google.com/p/fpdns/ http://fpdns.googlecode.com/files/Net-DNS-Fingerprint-0.9.3.tar.gz This needs an ebuild rewrite to use perl-app eclass or whatnot.
Created attachment 223333 [details] fpdns-0.9.3.ebuild Seems to do the job, but I suck with perl stuff... :P
Created attachment 276609 [details] 0.9.3-r1 perl-app module didn't work for me. I've switched to perl-module. See the -r1 version attached. Yet, the fingerprint database is outdated and not very useful.
Another ne homepage is: https://github.com/kirei/fpdns
net-dns/fpdns-0.10.0_pre20130404 in CVS.