Great Circle Associates Firewalls
(October 1992)
 

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Subject: Re: How to do proxy ftp?
From: Brent Chapman <brent @ GreatCircle . COM>
Date: Mon, 05 Oct 92 11:00:33 -0700
To: Marc Frajola <marc @ escargot . RAIN . COM>
Cc: firewalls @ GreatCircle . COM
In-reply-to: Your message of Mon, 05 Oct 92 02:19:13 PDT
Reply-to: Brent @ GreatCircle . COM

Marc Frajola <marc @
 escargot .
 RAIN .
 COM> writes:

#     While there are advantages to a custom FTP client, it's also an
# option to run a proxy FTP server that will work with a standard FTP
# client. In fact, after working within a firewalled environment for
# several months, I finally got the hacking urge to do just that. After a
# few months of testing, user feedback has been very positive.
# 
#     From the user's point of view, here's how it looks:
# 
#     $ ftp -n proxy_server proxy_port
# 
# 	[FTP connects to the Proxy Server, which is sitting on a
# 	 different TCP port number than a regular FTP server. The FTP
# 	 client thinks it's talking to a real FTP server at this point,
# 	 but it's not. The -n is to tell it not to authenticate since
# 	 it's not talking to a real server yet.]
# 
#     ftp> quote open real.internet.host.domain

There's the problem...  You're assuming a "traditional" UNIX-style FTP
client, where the FTP protocol is pretty much directly accessible to
the user.  What about Mac and PC GUI-based FTP clients, where the
"quote" command is NOT easily accessible, or is a pain in the ass to
use?  I've seen a lot of those...


-Brent
--
Brent Chapman                                   Great Circle Associates
Brent @
 GreatCircle .
 COM                           1057 West Dana Street
+1 415 962 0841                                 Mountain View, CA  94041


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