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Dropped Connections on All FTP Servers (5 posts)
- Started 9 years ago by andewms
- Latest reply 9 years ago from Scott McGuire
I have been using Fetch since Mac OS 9 and I've recently developed a problem that I cannot solve.
For some reason I can no longer connect to ANY FTP server. I immediately get a message "the FTP server dropped the connection."
I think the problem is related to my ISP (Roadrunner) because no other FTP client in Mac (or Windows) will establish an FTP connection from my home network.
The numbskulls at Roadrunner say "we don't officially support FTP access" which is ridiculous. If I get someone more technically informed, what could the problem be?
I am presently on Mac OS 10.4.9 on a Macbook Pro and have firewall off, passive connections on in Fetch. This is a typical transcript:
Fetch 5.2 (5C121) Intel running on Mac OS X 10.4.9 (8P2137) Intel English
StuffIt Engine 0x820, StuffIt SDK Version 10.1.1b1
Partial serial FETCHxxxxxxxxxxxxx
Connecting to ftp.fatcow.com port 21 (Mac OS X firewall is off) (5/19/07 12:54:38 AM)
Connected to 220.127.116.11 port 21 (5/19/07 12:54:38 AM)
The message reads "An FTP connection could not be opened because the FTP server dropped the connection."
Scott McGuire Administrator
It could be that your ISP has made some change that is preventing FTP from working correctly.
Being able to connect successfully - but then having the connection dropped - is often a sign of router problems. So it could also be an issue with your router/hub (the piece of equipment that shares your Internet connection between your computers); have you made any changes or upgrades to your home network's router recently?
You might want to try connecting you Mac directly to the cable modem, and see if you can make FTP connections without the router being involved. If you can, you should investigate why the router is might be causing your connections to be dropped.
I hope this helps - please let us know if we can be of more assistance.
Thanks Scott. I hooked my Macbook Pro straight into the cable modem using ethernet and I was able to connect to my FTP site successfully.
So...the problem must be in my shiny new flat-topped Airport Extreme base station I installed a few weeks back. I would have never even thought of the router being the source of the issue since I have been using it to connect to the 'net for weeks now.
Thanks for taking the time to personally respond!
Ok, this is for anyone else having dropped FTP connections issue that is also using the new Airport Extreme base station.
Connect to your base station using Airport Utility 5.1. Select INTERNET then click the tab NAT. Uncheck the box that reads "Enable NAT Port Mapping Protocol".
I have no idea what that is it but turning it off allowed me to connect to FTP servers. I sure someone can offer us a technical explanation.
Scott McGuire Administrator
We're glad to hear you figured out the problem and that you're able to connect with FTP again!
Actually, we're not sure why the "Enable NAT Port Mapping Protocol" option would cause FTP to stop working; we believe it shouldn't interfere with FTP.
So we think that may be a bug in the new flat Airport Extreme Base Stations (we know of a couple other bugs with them that affect FTP under certain circumstances).
Anyway, this is the first we've heard of that problem, so thank you for letting us know about it.
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