Great Circle Associates Firewalls
(March 1995)
 

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Subject: Re: Outgoing ftp and filters
From: Brent @ GreatCircle . COM (Brent Chapman)
Date: Thu, 30 Mar 1995 22:41:56 -0800
To: dfci . harvard . edu!ellozy @ sam . wal-mart . com
Cc: Firewalls @ GreatCircle . COM

At 16:22 3/30/95, mtaie01!mtaho02!root @
 sam .
 wal-mart .
 com wrote:
>Passive ftp is available for UNIX computers in source form, but what
>about its availability on other platforms (Macs and PCs running ftp
>software tcp/ip)?

Don't know anything about PCs.  For Mac, I've been told that the Anarchie
program (which is real slick because it combines an Archie client and an
FTP client into a single program) supports passive mode, and that Fetch
doesn't; I'm sure others do, too.

Also, most of the WWW browsers (Mosaic, NetScape Navigator, etc.) have
built-in FTP clients, and most of these are passive-mode.

>Also, how widely do the "main" public ftp servers support it?

I'm tempted to say "universally", but I'm sure there are exceptions.  If a
server doesn't, people using the built-in FTP clients in WWW browsers like
Mosaic and NetScape Navigator can't access the server; those clients are
responsible for a pretty significant fraction of the activity on the
Internet these days.

----------------------------------------------------------------------
For info about the Internet Security Firewalls Tutorial and a schedule
of upcoming dates, please send email to Tutorial-Info @
 GreatCircle .
 COM
----------------------------------------------------------------------
Brent Chapman                                 Great Circle Associates
Brent @
 GreatCircle .
 COM                         1057 West Dana Street
+1 415 962 0841                               Mountain View, CA  94041




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