We have customers connecting with us via an FTP server installed behind a firewall. Some scripts initially issue a Passive Command (PASV). On a random basis, it appears as if our response packet to their PASV command either gets lost or is not delivered in a timely manner. This triggers the sending of a second PASV command from the connecting system; however, back to back PASV commands result in our server issuing a disconnect. Some scripts will automatically reconnect; others require manual intervention. The difficult part is not every interaction is lost, in fact only a very few. It occurs randomly, within random server connections. After trace monitoring over a period of several months, there is no discernable pattern. Turning off the PASV command is not an option since some firewalls must send it to open a port before communicating. Turning off the PSAV command was tried and it failed because the connecting firewall required a PASV and a response before transfers could occur. The question is, has anyone running an FTP Server operation experienced anything like this? If so how were you able to resolve the issue. All comments/ideas greatly appreciated. Paul Binder _____________________________________________________________ <HR> W3Source Technical Network. Get a free email accout, learn flash, HTML, Web Design, programming, or join our growing community. <A HREF="http://www.w3source.net">http://www.w3source.net</A><BR><BR> If this message appears to be a spam email please forward it to <A HREF="mailto: [EMAIL PROTECTED]">[EMAIL PROTECTED]</A> ======================================================================= To contact the list owner: mailto:[EMAIL PROTECTED] Archives at http://www.mail-archive.com/edi-l%40listserv.ucop.edu/
