Hi guys! I have problem with wu-ftpd ftp server and I'll try to briefly explain what this is all about. I compiled the most recent version (2.6.2 I believe) and when user logs on from network ftpd replies with> ftp> ls 500 Illegal PORT Command 425 Can't build data connection: Address family not supported by protocol. ftp> and logs> Feb 20 14:31:03 frut ftpd[11467]: refused PORT 10.1.21.2,2381 from localhost [0. 0.0.0] Any additional 'lsing' gives> ftp> ls 425 Can't build data connection: Address family not supported by protocol. ftp> with nothing logged. When user logs on from the server where ftpd runs after issuing ls server responds with> ftp> ls 500 'EPSV': command not understood. 227 Entering Passive Mode (0,0,0,0,93,161) 425 Possible PASV port theft, cannot open data connection. ftp> and logs> Feb 20 14:34:14 frut ftpd[11475]: nova of localhost [0.0.0.0]: data connect from 127.0.0.1 for /bin/ls Any additional lsing gives> ftp> ls 227 Entering Passive Mode (0,0,0,0,241,19) 425 Possible PASV port theft, cannot open data connection. ftp> and logs> Feb 20 14:35:17 frut ftpd[11486]: nova of localhost [0.0.0.0]: data connect from 127.0.0.1 for /bin/ls I have been reading about problems with wu-ftpd and there are lots of them, aren't they? I apologize for possible miss-posting but this smells like wu-ftpd security issues. Any ideas? Regards, Pope