FYI, The NAT64 patch has been committed to OpenBSD's CVS repository. This means it should be part of official release 5.1. Commit logs here: http://marc.info/?l=openbsd-cvs&m=131853039828163 http://marc.info/?l=openbsd-cvs&m=131853093528864 http://marc.info/?l=openbsd-cvs&m=131853084528755 Simon