Some clients expect the server to set the return port number, while others expect a return over a consistent port. For example, under normal circumstances, FTP clients initiate communication with an FTP server over port 21 but expect a response over port 23. However, most good FTP clients can be set for something called Passive transfer (PASV Mode), which means that they instruct the server to set up a non-standard return port. PASV mode is a security form. It is mostly needed to pass over routers and firewalls. The purpose of a firewall is to prevent access to a network over known ports, such as the return FTP port 23. When the server sets up a non-standard return port, the communication can pass over a firewall.
Joshua Morgan PH: (864) 250-1350 Ext 133 Fax: (413) 581-4936 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, April 05, 2002 9:52 AM To: NT 2000 Discussions Subject: RE: FTP problem sorry.. PASV? Robert Rutherford MIS Department - DEK International GmbH +44 (0)1305 208232 +44 (0)7970 122362 "Morgan, Joshua" <[EMAIL PROTECTED] To: "NT 2000 Discussions" <[EMAIL PROTECTED]> > cc: Sent by: Subject: RE: FTP problem bounce-nt2000-235971@ls .swynk.com 05/04/2002 15:16 Please respond to "NT 2000 Discussions" If you are going through a firewall Check your PASV Settings Joshua Morgan PH: (864) 250-1350 Ext 133 Fax: (413) 581-4936 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, April 05, 2002 9:13 AM To: NT 2000 Discussions Subject: RE: FTP problem I've tried a failry good free client 'SmartFTP' that has worked great in the past. I have also tried IE.. both have the same problem... Robert Rutherford MIS Department - DEK International GmbH +44 (0)1305 208232 +44 (0)7970 122362 Martin Blackstone <MBlackstone@superiorac To: "NT 2000 Discussions" <[EMAIL PROTECTED]> cess.com> cc: Sent by: Subject: RE: FTP problem bounce-nt2000-235971@ls .swynk.com 05/04/2002 15:06 Please respond to "NT 2000 Discussions" What are you using for an FTP client? If it works great via command line, you may want to look in the clients direction. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, April 05, 2002 5:42 AM To: NT 2000 Discussions Subject: FTP problem Afternoon/Morning Guys, I've got a strange problem, not really 2000 related but just interested if anyone could shed some light on this for me:- I have an FTP server sat out on a DMZ behin a firewall... recently when an internal user goes to connect the delay for a connection is extremely slow, and some users will not even connect. However if a connect through a command line it is instant. Note: The problem is not related to name resolution as the problem exists even if I go through with an IP, both the valid internet address and the DMZ address have the same result! Strange... any ideas? Robert Rutherford MIS Department - DEK International GmbH +44 (0)1305 208232 +44 (0)7970 122362 **************************************************************************** **************** This E-mail and any files transmitted with it are in commercial confidence and intended solely for the use of the individual or entity to whom they are addressed. If you have received this E-mail in error please notify the Administrator by E-mail ([EMAIL PROTECTED]). Any views or opinions expressed are solely those of the author and do not necessarily represent those of DEK Printing Machines Ltd., or its affiliates. **************************************************************************** **************** ------ You are subscribed as [EMAIL PROTECTED] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to %%email.unsub%% ------ You are subscribed as [EMAIL PROTECTED] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to %%email.unsub%% ------ You are subscribed as [EMAIL PROTECTED] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to %%email.unsub%% ------ You are subscribed as [EMAIL PROTECTED] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to %%email.unsub%% ------ You are subscribed as [EMAIL PROTECTED] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to %%email.unsub%% ------ You are subscribed as [email protected] Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe send a blank email to [EMAIL PROTECTED]
