Great Circle Associates Firewalls
(December 1994)
 

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Subject: Twinsock
From: wallynet @ panix . com (Walter F. Netman)
Date: Tue, 20 Dec 1994 17:21:21 -0500
To: firewalls @ greatcircle . com

Has anyone tried TwinSock as a firewall extender?

What is TwinSock?
-----------------

TwinSock is a free implementation of proxy sockets for Windows.

Other Windows Sockets drivers use a network card, or a well known Internet
over serial lines protocol, such as SLIP, C-SLIP or PPP. These drivers may
access the network card or communications card directly, or via a VxD or DOS
based TCP/IP stack. their uses are limited to cases where either the machine
is directly connected to a network, or the host at the other end of the phone
line supports the same serial line internet protocol.

The other shortcoming of these drivers is that they require an official IP
address to operate, and frequently you will not be able to connect very far
beyond the host you connect directly to.

TwinSock, on the other hand, makes use of the IP address of the host to
provide socket services to the client. When an application running under
Windows requests socket services of TwinSock, TwinSock will transparently
pass these requests on to the TwinSock Host program running on the remote
machine for processing. The result is that you have all the same networking
capabilities as you would if your Windows machine were physically connected
to the network in place of the host machine.

For more information on what TwinSock can do for you, read on, or refer to
one of the following newsgroups, where TwinSock is discussed:

	alt.dcomp.slip-emulators
	comp.os.ms-windows.networking.tcp-ip
	comp.os.ms-windows.apps.comm
>
>



Follow-Ups:
  • Re: Twinsock
    From: "Alastair Young" <alastair @ cadence . com>
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