RE: [cobalt-users] Raq550 FTP client problem

["Oleg Volkov" <voleg@xxxxxxxxxxxx>]

> -----Original Message-----
> From: Oleg Volkov 
> Sent: Wednesday, September 11, 2002 1:47 PM
> To: cobalt-users@xxxxxxxxxxxxxxx
> Subject: Re: [cobalt-users] Raq550 FTP client problem
> 
> > I can connect and logon fine (through a scrreening router) from the RaQ550
> > to the RaQ3 but when I try to do a "get", I get a message saying:
> "Entering
> > passive mode" and the FTP clinet hangs. Coing from the other 
> > direction, everything works fine.
> > 
> 
> Get RFC for FTP to learn more about this strange and antique
> protocol.
> 
> In brief: there is one TCP/IP connection called control
> connection (port 21 - FTP). Using this connection both peers
> agree about another channel, called data. It may come
> on random free port that both agree on it. This agreement
> cover by commands PASV and PORT. What mean what, I've
> already forgot, because it was unimportant for me - check in RFC.
> 
> About your problem:
> 1. some kind of firewall resides between two boxes, that
> does not understand FTP, or suppose to do FTP only in one direction -
> from IN to OUT.
> 
> 2. You trying so called Third party FTP. What meen you open
> control connection to both computers from third one. After that
> you trying to establish data connection between two of them.
> This option open security hole, and closed by default on many
> FTP servers for years. It may be opened, however, if you insist.
> ---------------------------------
> I don't really need a tutorial on the FTP protocol. What is giving me
> problems
> is that the FTP client on the RaQ550 is using passive mode by 
> default. When I do ftp -help I get:
> 
>        Usage: { ftp | pftp } [-pinegvtd] [hostname]
>            -p: enable passive mode (default for ftp and pftp)
>            -i: turn off prompting during mget
>            -n: inhibit auto-login
>            -e: disable readline support, if present
>            -g: disable filename globbing
>            -v: verbose mode
>            -t: enable packet tracing [nonfunctional]
>            -d: enable debugging
> 
> I can write a perl script using Net::FTP and the get works fine
> except for being a slow as a snail.
> 
> So the firewall nor the screening router is not my problem
> it is the FTP client. I can't figure out how to NOT use passive
> mode.I would have thought that if the FTP client operated
> differently thatn it did on predecessor RaQ's Sun/Cobalt
> would have tipped people off and told them how to make it
> work the was it used to.
> 
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Sorry, that I was supposing you does not understand
what happening.
Look here for configuration manual:
http://compsoc.dur.ac.uk/cgi-bin/man2html?proftpd.conf+5

--
Oleg Volkov
System Administrator
SHUNRA Software Ltd.
http://www.shunra.com

+972-9-7643743/93121(w)
+972-51-601914(m)