May I recommend you use the ftp-proxy setup on OpenBSD? It is well-documented here: https://www.openbsd.org/faq/pf/ftp.html So far it has solved all passive FTP issues behind NAT for me. Arrigo -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://minnie.tuhs.org/pipermail/tuhs/attachments/20170416/c668d4b9/attachment.html>