Great Circle Associates Firewalls
(June 1996)
 

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Subject: FTPing with a GUI thru a fw
From: security @ crpht . lu (Security Responsible)
Date: Mon, 3 Jun 1996 18:54:58 +0100
To: Firewalls @ GreatCircle . COM

        Hello,

Some time ago,  david .
 black @
 e-mail .
 com launched the debate on using a GUI
ftp client to connect thru FW1....

Now suppose this:

      (ftp)
you ---------> FW1 (gateway) -------> host

>From a UNIX station, ftping is no problem,
* HOST: you connect to the gateway
* USER: give your user name on the gateway
* PASSWD: give your passwd on the gateway
* INTERNAL HOST: give the host to which you want to connect

and you get connected to that host.

Now supposedly your should be able to do the same from a GUI client by
giving out:
* HOST: the name of the gateway
* USER: when asked for your user name on the gateway, giving
          host_username @
 gateway_username@host
* PASSWD: host_passwd @
 gateway_passwd

But as said David Black, it doesn't work !

Now to test things, I tried to ftp from a unix box thru the gateway and act
as if I came from a GUI client. That is:

* HOST: gateway
* USER: host_username @
 gateway_username@host
.... STOP

and there it doesn't work. The gateway says it doesn't know the user
"host_username @
 gateway_username@host" which seems to indicate it doesn't
interpret the @ in the username as it should, and looks in the database for
the name as is! No need to go further and give the passwd...

Has somebody worked this out ? Are there people from Checkpoint out there ?

Bruno MAMER


__________________________________________________________________
Bruno MAMER                                   bruno .
 mamer @
 crpht .
 lu
Centre de Recherche Public Henri Tudor - Computer Network Services

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