Date: Sun, 28 May 2000 16:00:44 -0400 From: Laurence Berland <stuyman@confusion.net> To: "Mark S. Reichman" <reichman@twcny.rr.com> Cc: Mike <mike@rockatronic.com>, freebsd-stable@FreeBSD.ORG Subject: Re: FTP_PASSIVE_MODE=YES ???? Message-ID: <39317AEC.EDC7E1EA@confusion.net> References: <392F2A57.4B2C52EA@twcny.rr.com> <392FCE92.3F7A809@rockatronic.com> <392FD34A.7DD13055@twcny.rr.com>
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Passive is more likely to work than active. Under FTP, you connect to
the listening server for the control connection. Then, when you send a
PORT command you tell the server where to connect for the data
connection. Then you listen and the server connects. Under passive
mode, you send a PASV and then the server listens and tells you where to
connect for the data connection. This will work in more situations,
because often people have a firewall preventing incoming connections but
not outgoing, or something like this. You tend not to see the reverse
as relevant, since you probably couldn't have opened the control
connection under those circumstances.
Hope that helps,
Laurence
"Mark S. Reichman" wrote:
> My question is, and this must
> be a 4.0 Realease thing, why was it changed to FTP_PASSIVE_MODE=YES
> in the login.conf? I must admit I dont entirely understand what passive
> mode is, but I have never needed it or used it in all my years of
> computing. And
> if I'm not crazy, the ftp client in 3.4 FreeBSD and below did not start
> up in passive mode by default. Was it a change during the IPV6 mod? Is
> this necassary? I preferred the old behavior.
>
>
--
Laurence Berland, Stuyvesant HS Debate
<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
Windows 98: n.
useless extension to a minor patch release for
32-bit extensions and a graphical shell for a
16-bit patch to an 8-bit operating system
originally coded for a 4-bit microprocessor,
written by a 2-bit company that can't stand for
1 bit of competition.
http://stuy.debate.net
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