Open Transport 2.0 Technical Information - Part 2

This document contains technical information about Open Transport that may be useful to network managers and administrators. You do not need to read this document in order to use Open Transport.

Refer to article 58138: "Open Transport 2.0 Technical Information - Part 1." for the first part of this article.
Contents
Dialup network connectivity - AppleTalk
For dialup connectivity to AppleTalk networks, Open Transport supports Apple Remote Access version 2.0.1 or later.


Dialup network connectivity - TCP/IP
For dialup connectivity to TCP/IP networks (including the Internet) Open Transport supports third-party extensions known as "MDEVs." Serial Line Interface Protocol (SLIP) and Point to Point Protocol (PPP) connectivity are provided in this manner. Not all versions of all MDEVs are compatible with Open Transport 1.1 and later.


Native dialup network connectivity - AppleTalk

Apple Remote Access - version 3.0 or greater
ARA 3.0 supports AppleTalk and TCP/IP protocols concurrently over a PPP connection and is also compatible with ARA 2.x family clients and servers.


Native dialup network connectivity - TCP/IP

Apple Remote Access - version 3.1
ARA 3.1 offers the same features as OT/PPP for dialup access to a TCP/IP network.

OT/PPP - version 1.0 or later
OT/PPP is available on the Apple Software Update sites on the Internet and requires Open Transport 1.1.1 or later.


MDEVs

Open Transport 1.1 and later recognizes and is compatible with the following MDEVs. When properly installed they appear in the "Connect via" pop-up menu in the TCP/IP control panel.

FreePPP - version 1.0.5 or later
FreePPP is shareware and can be found on the Internet at the following sites: ftp://mirrors.aol.com/pub/info-mac/comm/tcp/conn/, and ftp://mirror.apple.com/mirrors/Info-Mac.Archive/comm/tcp/conn/.

FreePPP versions prior to 2.5 may experience problems when running with virtual memory turned on (including RAM Doubler). If you have problems using FreePPP with VM, either update to FreePPP 2.5, or temporarily turn VM off. The current version of FreePPP is 2.6. The FreePPP home page provides the latest information about FreePPP at http://www.rockstar.com/ppp.shtml.

MacPPP - version 2.1.4 or later (MacPPP 2.5 or later is recommended)
MacPPP versions prior to 2.5 may experience difficulties when running with virtual memory turned on (including RAM Doubler). If you have problems using MacPPP with VM, either update to MacPPP 2.5, or temporarily turn VM off. An Open Transport-compatible version of MacPPP (MacPPP 2.5) is included in the Open Transport Extras folder. For more information, please refer to the MacPPP Read Me document.

InterPPP II - version 1.1 or later
InterPPP II is a commercial software product. It has been replaced by CONNECT4ppp which is part of tcpCONNECT4. tcpCONNECT4 can be purchased from VisionSource at 800.326.7427. Additional information is posted on the InterCon web page at http://www.intercon.com.

MacSLIP - version 3.0.4 or later
MacSLIP is commercial software developed by Hyde Park Software. For availability and ordering information in the U.S., contact TriSoft at 800-531-5170 or 512-472-0744. For more details see the MacSLIP Web page at http//www.zilker.net/~hydepark/.

Sonic PPP - version 1.0.2 or later
SonicPPP is commercial software developed by Sonic Systems, Inc. For availability and ordering information in the U.S., contact Sonic Systems at 408-736-1900 (voice) 408-736-7228 (fax). For more details see the Sonic Systems Web page at http//www.sonicsys.com/.

NTS PPP - 2.0 or later
NTS PPP is commercial software developed by Network Telesystems, Inc. For availability and ordering information in the U.S., contact Network Telesystems at 408-523-8100 (voice) 408-523-8818 (fax). For more details see the Network Telesystems Web page at http//www.nts.com/.

LAN TunnelBuilder is a Virtual Private Network technology from NetworkTelesystems, Inc. For more details see the Network Telesystems web page at http://www.nts.com/.

SAT/SAGEM PPP - 1.02b1 or later
SAT/SAGEM PPP is commercial software developed by SAT/SAGEM. For availability and ordering information in the US, contact SAT/SAGEM at 408-446-8690 (voice) 408-446-9766 (fax). For more details see the SAGEM Web page at http//www.satusa.com/.

LeoTCP - 2.0.1 or later
LeoTCP is commercial software developed by Hermstedt GmbH. For availability and ordering information in the U.S., contact Hermstedt USA at 1-800-828-5522 (voice). In Europe contact Hermstedt GmbH at +49 621-76500 (voice) +49 621-7650100 (fax).

T-Online CSLIP - version 1.0.3 or later
T-Online CSLIP is commercial software developed by Computer Consulting GbR. For availability and ordering information in Europe, contact format network & communication at 49 2206 95840. For more details, contact format network & communication at info@format.de.

University of Michigan ISDN - 2.0.6 or later
In addition to these, there are a number of other MDEVs (examples include those from Pacer, FCR, and Tribe) which are indistinguishable from one another to Open Transport. When installed, these appear in the "Connect via" pop-up menu as "TCP/IP PPP."

AOL Link
AOL Link is commercial software developed by America OnLine. It is part of the America OnLine client software that is available from AOL's ftp site and allows use of MacTCP or Open Transport compatible TCP/IP applications while connected to AOL. The latest version of the AOL client is on the AOL ftp site at ftp://ftp.aol.com/.

CompuServe PPP is a commercial PPP implementation specifically designed for connecting to CompuServe. You can obtain it from the CompuServe web site at http://www.compuserve.com/.

Tips for SLIP and PPP configurations

Some MDEVs are known to be incompatible with other MDEVs. If you experience problems, remove unused MDEVs so that only the MDEVs you need are installed on your computer at a given time. If you still encounter problems, you may have to reduce the number of MDEVs installed to one to prevent conflicts.

Users who dial into a TCP/IP network or Internet Service Provider (ISP) may have been assigned a router (gateway) address that is not a part of their local subnet. This was an accepted but technically invalid configuration for MacTCP. Open Transport users should not enter a value for the router address or subnet mask; Open Transport/TCP generates correct values for these fields automatically. In unusual circumstances, these supplied values can be overridden using the Administration mode of the TCP/IP control panel.

If BootP is used over SLIP or PPP for interface configuration, and if BootP returns additional default router addresses, Open Transport will automatically add those addresses to the list of default routers.

When Open Transport is installed on a computer that previously had MacTCP configured for a server configuration, the initial configuration method--the selection in the "Configure" pop-up menu in the TCP/IP control panel--is set for the use of a BootP server. This default may not be the appropriate choice for you; please verify.

If your computer was previously configured for MacTCP "server" addressing and you experience connection difficulties using PPP or SLIP after installing Open Transport, follow these steps:

If your computer was previously configured for MacTCP "manual" addressing and you experience connection difficulties using PPP or SLIP after installing Open Transport, follow these steps:

Note: In MacPPP's ConfigPPP control panel, this setting is entered in the IPCP dialog box. Refer to the documentation that came with MacPPP or FreePPP for additional information.
Published Date: Feb 18, 2012