FTP Error 421 Login Incorrect

June 10, 2011 at 17:33:37
Specs: Windows 7
Hello,
I have an older Buffalo NAS that I use as an FTP server. Never had any problems, even after I changed my ISP to Qwest DSL last week. But I had wireless problems with the modem, and they swapped out my modem, and now with the new modem, I get a 421 Login Incorrect error when it tries to connect to the FTP Server address. Though this version of WS_FTP Pro is not really compatible with Windows 7, I have been using it successfully up until my modem change.
It keeps giving me a "421 Login Incorrect" error. I have reset the password on the NAS, and the modem is configured to accept FTP traffic via the NAS which is connected via Ethernet to the modem. All settings are the same as on the old modem, but no FTP.

Does anyone have any suggestions on what the problem might be? I'm guessing it's a problem or just a setting in the modem, but not sure what setting.
I have an "Application" setting created for FTP within the modem, like it was on the old modem.
Do I need to set up a Port Forwarding rule in the modem?
Suggestions welcome. Modem is an Actiontec Q1000. Laptop with Windows 7, 64 bit, using WS_FTP Pro 7.62.


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#1
June 11, 2011 at 04:19:32
Determine the IP address of the FTP server. Open a command prompt & type:

ftp IP_address & press enter.

Do you get a login prompt? Is so, enter the user name & password.

How do you know when a politician is lying? His mouth is moving.


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#2
June 18, 2011 at 17:58:47
I tried that, and I get the same error (421 Login Incorrect), so I changed the password on the Buffalo NAS, since it accepted the user I entered then asked for the password, and it still gives me a 421 Login Incorrect, so it's not the password.
Any other suggestions?

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#3
June 19, 2011 at 05:39:07
You wrote:

"I have an "Application" setting created for FTP within the modem, like it was on the old modem."

Exactly what does that mean? That modem is basically a combination modem/router. Is the laptop connected by cat5 or is it wireless? Make sure that it's not in the DMZ. What IP address does it have & what IP does the NAS have? If the laptop is connected wirelessly, try wired.

How do you know when a politician is lying? His mouth is moving.


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#4
June 19, 2011 at 20:55:51
There is a setting on the modem called "application", that allowed me to set up the modem to accept FTP requests.
The laptop is set up wirelessly, and I have tried it while hard-wired via ethernet/cat5, and it's the same result.
After further testing, it appears to be the modem. I connected to my old ISP, which we still have while we try DSL, and I was able to FTP successfully, so it's not the IP, user or password. For some reason, the modem seems to be killing the connection when I enter the FTP user and password.
What is the DMZ? I think I saw some settings for that in the modem, but wasn't sure what it was for.
Thanks.
On Edit, I checked the modem settings, and there is a DMZ Hosting setting in the modem configuration, but it is disabled.

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#5
June 20, 2011 at 04:09:16
Leave the DMZ disabled. I agree, the problem is in the modem. Read the manual or call tech support. The manual is online, if you don't have a hard copy.

How do you know when a politician is lying? His mouth is moving.


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