FTP fails Username/password

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Ashpoint - 29 Jun 2006 00:41 GMT

I have set up a FTP site on our SBS2000 system.

I tested ftp.localhost in DOS and via IE from inside the business. Both
work and with the AD user: fred, password: password.

From outside the site the connection asks for a Username and Password but
fails fred/password.

I have set up the ADSL router to port forward Port 21 to the server IP
address.

Is there an AD setting to allow fred to connect from outside to the FTP site?

What did I miss?

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Ashpoint

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Robin Walker [MVP] - 29 Jun 2006 09:46 GMT

> I have set up the ADSL router to port forward Port 21 to the server IP
> address.

If you are trying to use IIS behind a NAT router, then you might as well
give up now, and use a different FTP server that can do PASV-mode behind NAT
properly. IIS cannot serve passive-mode connections behind NAT.

If you can configure your FTP clients to use PORT-mode FTP only, then it
might work, but you might then have problems if your FTP clients are
themselves behind NAT routers, which is very common.

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Robin Walker [MVP Networking]
rdhw@cam.ac.uk

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Bernard Cheah [MVP] - 30 Jun 2006 07:57 GMT

that's harsh. i have seen user working fine with passive mode with
passiveportrange defined.

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Regards,
Bernard Cheah
http://www.iis.net/
http://www.iis-resources.com/
http://msmvps.com/blogs/bernard/

>> I have set up the ADSL router to port forward Port 21 to the server IP
>> address.
[quoted text clipped - 6 lines]
> might work, but you might then have problems if your FTP clients are
> themselves behind NAT routers, which is very common.

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