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Re: ftp ls & dir problem

Jean-Yves, try setting your ftp program to passive mode -- sometimes PASV,
PASSIVE, depending on your ftp client.

Chances are your firewall prevents these things from happening. Normally,
your ftp client opens a control channel to the server, and when you download
files, your client opens a port, and lets the server initiate the
connection. This initiating connection is often blocked by firewalls, which
are designed to prevent inside computers from allowing external users from
connecting to your servers -- which happens to be how ftp works.

Passive mode asks the server to open a port for you to connect to. (A poster
here in the lsat two weeks said such a thing was intended for
server-to-server communication.. firewalls didn't exist back then. Those
must have been very happy days..)

On Thu, Sep 16, 1999 at 10:39:37AM +0200, Jean-Yves BARBIER wrote:
> Hi all,
> I have a huge problem on my station: every time I try to
> ftp any external (web) service, the connexion is Ok, but
> when I try to make 'ls' or 'dir' no way! the answer' still
> the same: 
>  500 Illegal PORT Command
>  ftp: bind: Address already in use
> LAN: station PII400, 2.2.10, ftp=system base installation
>      server 486DX4/75, 2.2.10, ftp=system base installation
>      (firewall/gateway to cable-modem)
> AND not any log trace in any machine!
> BUT it works perfectly from the station to the server...
> Aaarghh, I'm gonna make a nervous poo!
> Any suggestion will be very welcomed.
> JY
> -- 
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Seth Arnold | http://www.willamette.edu/~sarnold/
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