Re: 2003 FTP with IIS

From: Bernard (qbernard_at_hotmail.com.discuss)
Date: 10/25/04 

Date: Mon, 25 Oct 2004 11:32:25 +0800

:) even it is MS may not follow it.
anyway, reason I brought is this command line tool allow you to do a quick
test (if you can't get hold of a decent ftp client app), just like what Alun
has pointed out. 

-- 
Regards,
Bernard Cheah
http://www.tryiis.com/
http://support.microsoft.com/
http://www.msmvps.com/bernard/
"Paul Baker [MVP, Windows - SDK]" <paulb@online.rochester.rr.com> wrote in
message news:OWD7nYRuEHA.2972@TK2MSFTNGP10.phx.gbl...
> Sorry, I was being dumb. Section 5.1 of RCF 959 makes it clear that PASV
is
> not required in a minimal implementation.
>
> Paul
>
> "Paul Baker [MVP, Windows - SDK]" <paulb@online.rochester.rr.com> wrote in
> message news:eNPCoRFuEHA.224@TK2MSFTNGP15.phx.gbl...
> > Alun,
> >
> > My thought process was that, since the FTP standard would seem to imply
> that
> > the PASV command is required to be supported, there would be no point in
> > testing if it is supported, because it is :) But maybe it is not on some
> > servers?
> > ftp://ftp.rfc-editor.org/in-notes/std/std9.txt
> >
> > It occured to me that I could use telnet in the way you describe, and I
> have
> > done so in the past. My thought process was that if you're going to all
> that
> > trouble, you may as well just use telnet for the whole thing or else use
> any
> > number of alternative FTP clients, as you say.
> >
> > Anyway, I think we all agree that it does not have the effect of making
> the
> > FTP command line tool use passive FTP all by itself which is where this
> > thread started off, I think.
> >
> > Paul
> >
> > "Alun Jones [MSFT]" <alunj@online.microsoft.com> wrote in message
> > news:uvWXfLFuEHA.4040@TK2MSFTNGP09.phx.gbl...
> > > There are some uses to "quote pasv".
> > >
> > > First, to reassure people that the server you're connected to really
> > _does_
> > > support PASV.
> > >
> > > Second, to eyeball the numbers returned, to see if the intervening NAT
> is
> > > correctly translating the IP address and port.
> > >
> > > It's certainly not enough on its own, though, for you to be able to
test
> > > that PASV connectivity works.
> > >
> > > You can use "quote PASV" and a telnet command in another window to
> > > accomplish the test, if you're reasonably quick.
> > >
> > > You enter the "quote PASV" line at the FTP client, and quickly take
the
> > last
> > > two numbers quoted back, and turn them into a single port by
multiplying
> > the
> > > first by 256 and adding on the second.  Then you take the first four
> > numbers
> > > as the IP address, and supply that with the port as your arguments to
> > > telnet.  Once connected, you can enter "quote LIST" back at the FTP
> client
> > > (don't use "dir", that will send a PORT command and blow away your
PASV
> > > connection), to get a file listing, demonstrating that all is well.
> [The
> > > telnet will close immediately after the file listing is over.]
> > >
> > > But that's really an awful lot of effort, compared to finding an FTP
> > client
> > > that you really like, and which will do PASV FTP transfers.
> > >
> > > Alun.
> > > ~~~~
> > > "Paul Baker [MVP, Windows - SDK]" <paulb@online.rochester.rr.com>
wrote
> in
> > > message news:%23Z0rCrDuEHA.4040@TK2MSFTNGP09.phx.gbl...
> > > > Bernard,
> > > >
> > > > I agree with Alun. It's useless. What does it achieve?
> > > >
> > > > Paul
> > > >
> > > > "Bernard" <qbernard@hotmail.com.discuss> wrote in message
> > > > news:%23Lb4d89tEHA.3476@TK2MSFTNGP14.phx.gbl...
> > > >> At least it does try to connect as passive mode and see if the
socket
> > can
> > > > be
> > > >> open, right ?
> > > >>
> > > >> -- 
> > > >> Regards,
> > > >> Bernard Cheah
> > > >> http://www.tryiis.com/
> > > >> http://support.microsoft.com/
> > > >> http://www.msmvps.com/bernard/
> > > >>
> > > >>
> > > >>
> > > >> "Alun Jones [MSFT]" <alunj@online.microsoft.com> wrote in message
> > > >> news:#zKnqS4tEHA.2808@TK2MSFTNGP14.phx.gbl...
> > > >> > "Bernard" <qbernard@hotmail.com.discuss> wrote in message
> > > >> > news:eZZngkytEHA.904@TK2MSFTNGP11.phx.gbl...
> > > >> > > you can do this in command line ftp.exe
> > > >> > >
> > > >> > >> quote pasv
> > > >> >
> > > >> > That's hardly useful.  All it does is tell the server to open up
a
> > > >> listening
> > > >> > socket.  It doesn't tell the client to connect to that listening
> > socket
> > > >> when
> > > >> > it makes its next transfer.  Passive transfers are not supported
in
> > the
> > > >> > command-line FTP client - but there are numerous third-party
> clients
> > > > that
> > > >> > are available which do support passive mode file transfers.
> > > >> >
> > > >> > Alun.
> > > >> > ~~~~
> > > >> >
> > > >> >
> > > >>
> > > >>
> > > >
> > > >
> > >
> > >
> >
> >
>
>

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