Great Circle Associates Firewalls
(September 1996)
 

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Subject: Re: TN3270 and TN5250 through a firewall using OS/2 Clients
From: "Sean Fuller" <c60201 @ zone . arnold . af . mil>
Date: Tue, 3 Sep 1996 15:02:07 -0500
To: firewalls @ GreatCircle . COM
In-reply-to: <firewalls-owner @ GreatCircle . COM> "TN3270 and TN5250 through a firewall using OS/2 Clients" (Aug 30, 11:43am)
References: <841423389FriCDT . firewalls-owner @ GreatCircle . COM>

>Why would a proxy written for Port 23 not be able to accomodate all forms of
>telnet?

I can tell you why my proxy does not currently support tn3270.  It is
because I do not send a 3270 data stream for the initial login.
Instead, I use line mode.  Emulating a 3270 data stream is a lot
harder.  I plan on supporting it soon because it was requested by
our users, one of which is my wife who is a DBA on the mainframe here.
If I did not have to converse with the client before allowing them
through the firewall, it would be easy to write a proxy to allow
passthrough.

:)  Actually, I'm a Unix guy now and, of course, I deny 3270 because :)
:)  it is an IBM Mainframe protocol and non-Unix things suck.        :)

Indexed By Date Previous: Re: Any virtual telnet proxy gateways about?
From: "Sean Fuller" <c60201 @ zone . arnold . af . mil>
Next: Re: Win NT PPTP vs. VPN
From: Ron DuFresne <dufresne @ winternet . com>
Indexed By Thread Previous: Re: TN3270 and TN5250 through a firewall using OS/2 Clients
From: nto2584 @ dsacg1 . dsac . dla . mil (Steven C. Payne)
Next: Re: TN3270 and TN5250 through a firewall using OS/2 Clients
From: Zachary Roger Amsden <amsden+ @ andrew . cmu . edu>

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