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Re: invalid PORT command

Hi there,

I don't know the reason of this message but I've had the same if I
mistakenly MASQ'ed
doubly, i. e. packet went throu by two rules with -j MASQ (one from FORWARD
and one from OUTPUT chain).

Regards for all

----- Original Message -----
From: "Gabor Gludovatz" <ggabor@sopron.hu>
To: <debian-user@lists.debian.org>
Sent: Friday, May 25, 2001 4:18 PM
Subject: invalid PORT command

> Hello,
> there is an NT FTP server with private IP ( behind a
> Debian, and on the Debian the port 90 is forwarded to the nt's port 21
> with redir. If I try to connect
> to the Debian's port 90, I get connected to the NT, but if my ftp client
> tries to download
> something or even do a directory listing, the nt's ftp servers says:
> 'invalid port command'.
> So, the server (the NT) is masquaraded, not the client, that's why I use
> PORT instead of PASV.
> My FTP client (Internet) --> Debian (masq firewall) --> NT FTP server
> (private IP)
> Cmd: PORT 63,112,201,195,4,136
> 500: Invalid PORT Command.
> Does someone know, what to do in this case?
> The ftp server is Microsoft FTP Service (Version 5.0).
> Thanks,
>   Gabor
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