Date: Fri, 5 Jul 2002 09:18:52 -0500 From: "Raja Velu" <raja@micronetusa.com> To: <freebsd-questions@freebsd.org>, "'Dan Nelson'" <dnelson@allantgroup.com> Cc: <ryan@wonko.com> Subject: RE: Browser-based FTP access as part of a web page - SOLVED Message-ID: <001501c2242e$e37b4f40$1d00a8c0@www.micronetusa.com> In-Reply-To: <20020701185505.GA8295@dan.emsphone.com>
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> In the last episode (Jul 01), Raja Velu said: > > The FTP URL actually points to the BSD Server's IP > (1.2.3.4) - not to > > the Windows 2000 server. So, I have not setup any forwarding rules > > for that. I am failing to understand why, all of a sudden, there is > > request for communication from the web browser to an arbitrary port > > on the BSD server (please see the last lines on either of my logs > > above). > > That's probably the data connection for the result of the "LIST" > command. With passive mode FTP, both the control and data connections > are initiated by the client. With active FTP, the server initiates > data connections back to the client. I couldn't tell you why Explorer > decides to use passive mode on pages with frames and active otherwise, > though. > > Active FTP breaks servers behind simple packet filters, Passive FTP > breaks clients behind simple packet filters :) For this discussion, > ipfw is a simple packet filter; natd is not. You may need to open > ports 49152-65535 to allow for passive incoming connections. > > -- > Dan Nelson Thanks for the opening up the possibility of passive FTP. I have now opened up ports 49152-65535 on my IPFW rule set and everything is going on fine. Rgds, Raja To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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