Is this the original ICS FTP server component with your latest changes?
Angus Robertson - Magenta Systems Ltd wrote: > I have a problem with failed file uploads between the ICS FTP client > and server when using passive mode, which may be related to the > passive port pool. For some reason, the passive port pool does not > allocate sequential port numbers, but continually re-allocates the > same numbers, if they have been freed. > > So one upload works fine, less than a second later an attempt to > upload the next file fails with 'connection refused' in the client, > perhaps because the same port can not be re-used so quickly? > > 21:59:53:779 ** > PASV > 21:59:53:808 ** < 227 Entering Passive Mode (192,168,0,7,82,9). > 21:59:54:544 ** < 226 File received ok > 21:59:55:209 ** > PASV > 21:59:55:239 ** < 227 Entering Passive Mode (192,168,0,7,82,9). > 21:59:56:290 Upload Failed: Unable to establish data connection - > Connection refused (#10061) > > Although the client fakes a 550 error for the connection refused > error, it does not send any commands to the server, which keeps > listening. After the failed upload, I retry the upload, but at this > point the server is out of sequence and often responds with old > responses, like: > > 21:59:58:069 ** > PASV > 21:59:58:101 ** < 226 File sent ok > > I've changed my application code to always send an AbortXfer command > if the connection is refused, so the server gets back into sync with > later commands. Maybe AbortXfer should be in the FTP client code? > > But I'm wondering if passive mode should be using incrementing ports, > and not the same ones all the time (my server only used four > different ports for the four simultaneous clients). > > Note these FTP commands are passing through a VPN, three Sonicwalls, > two ADSL links and an ADSL bonding Firebrick, so the error could be > elsewhere, although I still have to recover from it better. > > Angus -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
