Hello, we are trying to find a solution for the "slow ftp bin transfer problem" There is also a German post at the nas2000 forum: http://nas2000.homeunix.com/thread.php?postid=464#post464 Many users have the problem that ftp download through an internet connection from the NAS may be very slow. Test setup: PC - Internet - ADSL modem - Router - Switch - NAS Port forwarding (20,21) is configured for modem and router. I traced the packets sent/received from NAS (connected sniffer with HUB between Switch and NAS) What I know already: - ascii mode transfer is fast, bin mode may be slow - on local net ftp is fast - it is caused from too large packets sent from the nas NAS always use packet size like if MTU=1500 e.g. NAS sends two large and one small packet - the two large ones are rejected with "fragmentation needed" and the smaller one passes --> retransmission... - MTU setting of ifconfig is ignored by ftp in bin mode In ascii mode packet size is reduced accordingly - MSS setting of route command is ignored - MSS setting with SocketOptions in proftpd.conf is ignored - most PPPoE connections need a setting of MTU=1492 because of 8 bytes overhead. That corresponds to MSS=1452. - same behaviour for Tinky and RS Firmware What I don't know: - how to tell proftp or the NAS to reduce the packet size as if MTU=1492 Any ideas? HWguru (Alfred)