Michael <a@a.com> wrote:

> I have a FTP site (IIS 6.0) set up on port 7721. What is the command
> line syntax to use on a windows machine to attach to this?
>
> I tried ftp ftp.domain.com :7721
> and
> ftp ftp.domain.com 7721
>
> And neither works.

> In addition, when I try to go to ftp://ftp.domain.com:7721 via IE I
> get the following error:
>
> An error occurred opening the folder on the FTP server. Make sure you
> have permission to access this folder.

"Michael" <a@a.com> wrote in message
news:ev9QgqXkGHA.3536@TK2MSFTNGP05.phx.gbl...
> Greetings,
>
> I have a FTP site (IIS 6.0) set up on port 7721. What is the command line
> syntax to use on a windows machine to attach to this?
>
> I tried ftp ftp.domain.com :7721
> and
> ftp ftp.domain.com 7721
>
> And neither works.
>
> I can ftp via command line through Unix just fine.
>
> In addition, when I try to go to ftp://ftp.domain.com:7721 via IE I get
> the following error:
>
> An error occurred opening the folder on the FTP server. Make sure you have
> permission to access this folder.
>
> Details: The operation timed out.
>
> Any help would be appreciated. Thank you.
>

"Robin Walker [MVP]" <rdhw@cam.ac.uk> wrote in message
news:esYGxCZkGHA.4716@TK2MSFTNGP03.phx.gbl...
> Michael <a@a.com> wrote:
>
>> I have a FTP site (IIS 6.0) set up on port 7721. What is the command
>> line syntax to use on a windows machine to attach to this?
>>
>> I tried ftp ftp.domain.com :7721
>> and
>> ftp ftp.domain.com 7721
>>
>> And neither works.
>
> ftp -n
>
> then as an ftp command:
>
> open ftp.domain.com 7721
>
>> In addition, when I try to go to ftp://ftp.domain.com:7721 via IE I
>> get the following error:
>>
>> An error occurred opening the folder on the FTP server. Make sure you
>> have permission to access this folder.
>
> If the login is password protected, then send IE to
>
> ftp://username@ftp.domain.com:7721/
>
> --
> Robin Walker [MVP Networking]
> rdhw@cam.ac.uk
>

"Robin Walker [MVP]" <rdhw@cam.ac.uk> wrote in message
news:OrF$mo8kGHA.1028@TK2MSFTNGP04.phx.gbl...
> Michael <a@a.com> wrote:
>
>> I can use the ftp -n and log on correctly. However, just a simple
>> "ls" or "dir" will time out- it will never come back. Same issue
>> using IE. I get the same error using
>>
>> ftp://username@ftp.domain.com:7721/
>>
>> I authenticate just fine, but never get any listing of files.
>>
>> Now, if I use some other FTP client (CuteFTP, WinFTP) everything works
>> great. I can upload, download, etc.
>>
>> The FTP server IS behind a NAT firewall, if that makes a difference.
>
> I can only reconcile what you have said above if the FTP *client* is
> behind a NAT router, not the *server*.
>
> Your average NAT router cannot process Active PORT-mode FTP connections
> made to non-standard ports (i.e. other than port 21). Passive-mode
> connections will work to non-standard ports.
>
> Your use of port 7721 is non-standard, so NAT routers cannot do their
> magic.
>
> --
> Robin Walker [MVP Networking]
> rdhw@cam.ac.uk
>

Michael <a@a.com> wrote:

> I can use the ftp -n and log on correctly. However, just a simple
> "ls" or "dir" will time out- it will never come back. Same issue
> using IE. I get the same error using
>
> ftp://username@ftp.domain.com:7721/
>
> I authenticate just fine, but never get any listing of files.
>
> Now, if I use some other FTP client (CuteFTP, WinFTP) everything works
> great. I can upload, download, etc.
>
> The FTP server IS behind a NAT firewall, if that makes a difference.

Michael <a@a.com> wrote:

> Hmmm. Both the client AND the server are actually behind NAT
> routers/firewalls.
>
> So, does this mean that CuteFTP and WSFTP are using passive
> connections,

> whereas command line utilities and IE are using active mode?