Hi
On Wed, 28 Jul 1999, Glynn Clements wrote:
>
> > > > I just had this same problem. I remembered I seen a post having to do with
> > > > this, and here I am. when I ftp using windows 98 FTP command, I get this
> > > > error when typing ls at the command line.
> > > >
> > > > Can't build data connection: no PORT specified
> > > >
> > > > Here is what I have found about IP Masquerading. When making a connection,
> > > > the person behind the firewall must make the initial connection. Because of
> > > > this, the ftp logs in to the remote system just fine. (You initiated the
> > > > connection) When you type ls, the FTP server tries to open up an ftp-data
> > > > port back to you, but it doesn't work! Why, because like I said, you must
> > > > initiate the inital connection. How do you do this? I don't know.
> > >
> > > Sounds like you've forgotten to load the ftp masquerading module.
> > >
> > > # modprobe ip_masq_ftp
> > >
> > > should solve it.
> >
> > ip_masq_ftp is loaded okay. But it doesn't works.
>
> Do you have any firewall rules which would block inbound TCP
> connections to ephemeral ports? If so, then you will have to use
> passive (PASV) mode instead (where the client creates the data
> connection).
>
>
I have only one rule? that disables outgoing connections to port 80 on any
host. And my clietns software does not support passive mode:(
Denis Chapligin
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