Just a patched version of the "official" Net::Interface 0.4 @ http://www.cpan.org/modules/by-module/Net/SRZ/ The official version provides bogus MAC addresses, and mine has been hacked to remedy this. I'm not sure what I did to get it to work. I believe I installed my version on top of the official version (after having built the original version), and then rebuilding... Also, I was not using perl 5.6 YMMV