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Frequently Asked Questions


I still can't get it to work, what should I do? See the Troubleshooting page on our web site. Or, you might want to see IPNetRouter's online guide.

What's the latest status of IPNetRouter? (8-Aug-2001)

1.6 was released in August, 2001. Release 1.6 contains some bug fixes and a handful of enhancements, mostly to the port mapping and IP Filtering capabilities of IPNetRouter. Release 1.5 included "Better PPPoE Routing", Dynamic DNS support, and an exposed host feature, along with numerous bug fixes and other improvements. Beginning in release 1.5.4 an optional browser using configuration application, previously available separately, is now installed. If you are using a version of IPNetRouter earlier than 1.4.7 on MacOS 9.x, we recommend yhou upgrade to the latest release. The upgrade is free to customers with valid paid registration key.

In July of 2000, a cheaper 68k only license was introduced for use with IPNetRouter 1.5.x. This is a good alternative for those that do not intend to upgrade and just want to keep an old 68k box running.

OS X support is in early development. You can use an OS X LAN client with an IPNetRouter gateway running under an older Mac OS. IPNetRouter 1.5 will install in the classic environment under Mac OS X, but we do not support that configuration. We will post announcements to the nettalk and netannounce mailing lists as more information becomes available.

See our download page and latest IPNetRouter release notes for other info on the latest available versions. Visit our OS X Status web page for the latest OS X information. A link to OS X troubleshooting info is currently at the bottom of that page.


Will your router work on 68K machines?

Yes, IPNetRouter requires a minimum of a 68030 CPU, 7.5.3 or later and a minimum of Open Transport 1.1.2 or later. The 68k version of IPNetRouter is available for download from our web site.


Is there an upgrade or downgrade path for the the 68k only license? (8-Aug-2001)

If you eventually plan to upgrade your gateway machine to a PPC platform, purchase the higher priced "universal" license. This will cost you less in the long run.

If you already have the full universal license you may not "downgrade" to a 68k license, but your older key will continue to work on both PPC and 68k versions of IPNetRouter.

If you replace a 68k machine with a PPC gateway, you can always purchase the cheaper 68k license and transfer the older PPC/68K license to the new machine for use there. The 68k machine can then be used as another router/gateway/DHCP server or sold. Keep the 68k machines in service! We hope the lower 68k only price will encourage everyone use these perfectly good machines rather then throw them in the trash.


Do I have to Install IPNetRouter on all my computers? Will I need to purchase a license for each machine?

No. In most small home or business networks, you only need to Install IPNetRouter on one Macintosh --known as the "gateway" Mac-- to share the Internet with any number of local network "client" machines (Macs, Windoze, Linux, whatever). For most Internet sharing installations, you will only need to purchase and install one copy of IPNetRouter for all local machines to benefit. The client machines will of course require that their TCP/IP settings be configured to use the Gateway machine as their Internet router.

How to setup IPNetRouter is covered in the various tutorials on our web site, the IPNetRouter guide, and in the automated web configurator application (included in 1.5.4 or later releases).

A single Mac IPNetRouter gateway can support hundreds (or even thousands!) of computers on your IP network. That's how the Internet Protocol and Apple's Open Transport were designed to work. Unlike other software routing solutions, we do not artificially limit the number of LAN clients based on how much you are willing to pay. That would be totally unnecessary!


Is there an easier way to configure IPNetRouter?

IPNetRouter 1.5.4 and later comes with a web configurator application that you can use if the IPNetRouter application's Interface Window is too confusing. If you have an older version of IPNetRouter and would like to use this web configurator application, it is available for download. It won't solve any hardware problems you might be experiencing but it should get you up and running quickly if IPNetRouter's user interface is causing confusion.

Note, you can only use this application for configuring your LAN if you have a direct connection to the internet that is not behind a firewall or NAT router. Some ISPs now use NAT to increase the number of IP addresses they can assign to their customers and proxy firewalls to increase network security.


Does IPNetRouter work with AirPort and other wireless cards?

Yes. Apple licensed a version of IPNetRouter's routing software for use with Mac's equipped with AirPort cards. In cases where more complex routing of wireless LANs is needed, IPNetRouter may be a better solution then the software that Apple provides. Our AirPort and IPNetRouter Guide has useful information for users interested in setting up wireless networking, with or without IPNetRouter. The "AirPort" and "OS 9 Compatibility" topics on the IPNR Troubleshooting page also denotes how to reduce potential compatibility issues introduced by AirPort software.

IPNetRouter will also work with Farallon Skyline cards for wireless networking. Skyline cards can be installed in many older Powerbooks that do not have AirPort capabilities. Using IPNetRouter, a Powerbook with an AirPort card and an additional Skyline PC card has been demonstrated to provide a dual wireless NIC routing solution.


Is there a way to suppress the initial dial-out of the PPP connection until it is actually needed?

Not for Mac OS 8.6 and earlier.

There isn't a good solution without modifying the way the OT/PPP configurator works. In order to have IPNetRouter detect whether there is PPP traffic, the IP module in Open Transport needs to have a corresponding interface that it can route traffic to. When this interface is defined by building the corresponding link stack (the chain of protocol modules from IP to the data link provider). The PPP configurator runs and tries to establish a connection. If you set PPP to not connect automatically when opening TCP/IP applications, the PPP configurator fails to create the corresponding link stack.

For Mac OS 9 (OT2.5.x), you can suppress the initial dial out by unchecking "Dial on Demand" in the Gateway options window, and using ResEdit to change 'STR#' resource 131 "Option Settings" from "IPNRDials=1" to "IPNRDials=0". I plan to make this easier in a future version.

See the Technical Specs section for more info on modifying parameters in IPNetRouter's resource fork.


IPNetRouter won't disconnect, or keeps trying to reconnect. What can I do to prevent this?

IPNetRouter might remain connected, keep trying to reconnect, or be prevented from disconnecting properly for the reasons listed below:
  1. "Remain Connected" is selected in the Gateway window.
  2. Some process on your network is generating traffic for your PPP interface. Check IPNetRouter's log window to see if there is any information on which LAN client started a diaout connection. A prime source of this problem is the Network Time Server feature present in MacOS 8.5 or later Date and Time control panel, either on clients or the gateway machine.
  3. The "Show PPP Dialogs" Gateway option may not interact properly with the gateway's connection client software. Turn this option off if experiencing problems.
  4. Starting in OS 9.0, Apple permitted the use of TCP/IP filesharing. There is a keep alive request periodically sent out if there are any remote TCP/IP filesharing volumes mounted on/from your gateway machine that may cause IPNetRouter to redial.
  5. In OS 9.1, the "SLPplugin" extension release 1.1.3 will periodically attempt to access SLP services using the SLP multicast address. Version 1.1 from OS 9.0.4 does not do this. This may cause your IPNetRouter to attempt to dial. Disable or replacing the SLPplugin with 1.1.


I get an error that another machine is using the same IP address, what can I do?

Verify that the IP conflict does not come from having two machines on your own LAN configured with the same IP address (in the Mac TCP/IP control panel).

If you are connected with a cable/DSL modem using the "Single Ethernet" configuration your LAN is directly attached to the cable/DSL network. It is quite possible someone else on the cable modem network is already using the IP addresses suggested in the Getting Started examples. In this case you can either choose different IP addresses, or switch to a "Dual Ethernet" configuration to isolate your LAN from the cable modem network.

The address specified in the error dialog may be incorrect. Check to make sure that any IP address you are trying to use with IPNetRouter is not in use elsewhere, even if it is not the one mentioned in the error dialog.

IPNetMonitor may be of use in tracking down the problem.


Will IPNetRouter work with more than two physical Ethernet interfaces?

Yes. You can use multiple ethernet cards in machines that support them. IPNetRouter is generally limited by what Apple supports in Open Transport and by card manufacturer compatibility with Open Transport for any particular MacOS. Most (if not all) card manufacturers do not support more than one card at the same time for IP multihoming with their ethernet drivers. The workaround for this is to use different Ethernet cards from different manufacturers--you can easily get four Ethernet interfaces in this way. See the Troubleshooting page for more info on Ethernet card conflicts. IPNetRouter supports up to four separate NAT interfaces (they all have to be physically separate interfaces).


What Other Interfaces Can Be Used Besides Ethernet?

Some Macs cannot take additional Ethernet cards. You may be able to use LocalTalk (via MacIP), AirPort, Firewire, TokenRing, or even a Skyline wireless card as a second (or third or fourth), physically separate interface besides or in addition to Ethernet. Any interface that can use IP through Open Transport (using standard APIs) may be able to take advantage of IPNetRouter. In addition, IPNetRouter works with various PPPoE implentations such as the Alcatel USB, Enternet, and MacPoet solutions.


Can I use IPNetRouter to share my cable modem connection with VPC?

IPNetRouter is an Open Transport native IP router. That is, it enables Open Transport to perform routing.

VirtualPC bypasses Open Transport completely and talks directly to the Ethernet hardware so it can run the PC networking stack. The best way to look at VPC is as a separate stand alone PC that shares your Macs hardware.

To use VPC through IPNetRouter, you would need to run VPC and IPNetRouter on separate Macs so VPC can connect through your gateway that runs IPNetRouter.

See also


How do I configure my Windows 95 machine to use my Mac as its gateway?

You will have to be somewhat familiar with the Windows95 Network control panel. Here is basically what you need to do:

  1. Open the Windows Network control panel.
  2. Select the TCP/IP line for the Windows Network card.
  3. Open the Properties of this device. You should see several Tabs (IP Address, Gateway, and DNS configuration are the ones we are interested in).
  4. Go to the IP Address tab. Give your machine an IP Address within the range of your Private LAN (for example,
  5. Go to the Gateway tab. Enter the IP Address of the machine running IPNetRouter (typically Click the Add button. This address should now be added to the list of Installed Gateways.
  6. Go to the DNS Configuration tab. Enter a host name (any name, without spaces, for this machine, such as "Win1", will do). For the domain, enter the domain of your Internet service provider, such as Then go to the DNS part and enter your DNS server addresses (as provided to you by your ISP). For each address, click the Add button.
  7. Click the OK button. This will take you back to the Network control panel. Click the OK button again. You may have to insert your Windows CD-ROM (or diskette) and restart Windows.

    This should do it! (You'd think!)The only other thing you may have to check is that your Internet connection is setup (on the Windows machine) to use the Ethernet card and NOT a dial up connection. There is another Windows control panel to let you select how you want to connect to the Internet.


Configuring a Windows 2000 client machine for Ethernet

You will have to be somewhat familiar with the Windows2000 Network interfaces. Here is basically what you need to do:

  1. Right-click on My Network Places
  2. Select Properties from bottom of menu
  3. In the window that opens, right-click on your Ethernet adapter
  4. Select Properties from the bottom of the menu
  5. Select Internet Protocol (TCP/IP) from the list in the properties window

If you don't see TCP/IP, then

  1. select Install / Network Protocol / Microsoft / TCP/IP
  2. Click on the properties button
  3. Click on "Use the following IP address" button and enter your private LAN client's IP address (for example,, subnet mask (usually, and Default gateway (forwarding router) IP address (in this example,
  4. Click on the "Use the following DNS server addresses" and enter your ISP DNS address (or LAN gateway IP address if using IPNR's DNS forwarding feature).
  5. Click OK until all the menu windows are closed.

It is probably a good idea to restart your Windows box after saving these changes.

Configuring a Windows client to work with IPNetRouter is just like configuring a Windows box to work with any other IP router. See other web sites, such as the MacWindows web site, and your Windows documentation for more for more info on configuring Windows for IP networking.


How do I configure IPNetRouter to work with Timbuktu?

In order for Timbuktu Pro to work through a firewall (IP masquerading), UDP port 407 and TCP ports 1417 through 1420 must be open. Timbuktu Pro uses UDP port 407 for connection handshaking and then switches to the TCP ports for Timbuktu Services: Control (1417), Observe (1418), Send (1419), and Exchange (1420). Chat, Notify, and Intercom use Dynamic TCP ports. Netopia's web site covers this in greater detail. As explained there, how Timbuktu 2 and Pro work with port mapping varies somewhat. If you search our nettalk web archives on the term "Timbuktu" you will find a host of solutions to all sorts of different Timbuktu deployments.

You can map ports using the Port Mapping window in IPNetRouter. See the Inbound Port Mapping section.


Does IPNetRouter work with FreePPP?

IPNetRouter does not support dial on demand with FreePPP. You must use OT/PPP 1.0.x, Remote Access 3.x, or FCR PPP (aka LeoMLP) for auto connection to work.

Notice that Apple's current Open Transport implementation does not support "dial on demand", but rather dials when a client opens a TCP/IP endpoint causing PPP to be configured. With IPNetRouter, the client opening a TCP/IP endpoint might not be on the same machine as IPNetRouter, so IPNetRouter needs to detect traffic for your PPP interface and instruct PPP to dial out if it is not already connected. IPNetRouter currently knows how to do this for OT/PPP and FCR PPP. FreePPP uses a different API.


Does IPNetRouter work with ISDN cards from Hermstedt that use LeoTCP?

Yes, but you must obtain LeoTCP/OT version 3.03 or later (version 3.01 will not work). Depending on the ISDN hardware connection method, you may need to treat your connection as a PPP or Ethernet interface for purposes of using instructions in our guide. The latest versions of the Hermstedt drivers appear to support Remote Access connection directly and do not appear to use LeoTCP.


Will your router work on the same machine as MacDNS or QuickDNS Pro?

They should. Because of limitations when using a Masqueraded interface (NAPT), you may want to deploy this software on a different machine and not deploy them on the routing Mac. An understanding of how port mapping works in IPNR may be required to get this to work correctly.

In the case of DNS servers (MacDNS and QuickDNS), if you private LAN interface is not your primary interface or you wish to share the DNS server for both your private LAN, you may need to turn off DNS Forwarding and map UDP port 53 between the gateway's public and private IP addresses.


Will AIMS work on the same machine as IPNetRouter?

Yes, but...because of the way AIM is designed, you may only be able to either use it on your gateway or on the other machines on your LAN, not both.


What is the performance like on older machines?

IPNetRouter itself is very fast by virtue of being Open Transport native. Routing is handled by OT within the OS kernel. Even a Mac IIsi (68030) can provide good performance depending on your network configuration.

Older machines have other limitations however. Trying to use LocalTalk and a serial port at the same time will cause performance to suffer on machines that do not have DMA serial ports (non AV 68Ks). On these machines, LocalTalk disables interrupts for so long that your serial port can lose characters causing frequent retransmissions. The maximum serial port speed is 56k on such machines. Some PowerPC Performas may also suffer from DMA handling problems.

Routing between two IP interfaces on a single Ethernet can also reduce performance (Cable or DSL modem with single Ethernet for example). In this configuration, the Ethernet must transfer each packet twice so the second transfer has to wait for the first transfer to get out of the way.

Older machines typically do not have built-in Ethernet which can be another limiting factor.

The older versions of Apple's Ethernet drivers do not support 100mb ethernet very well. When using pre-G3 machines, 100mb ethernet may only reach throughput of 40megabits/sec. Some third party ethernet drivers, especially later ones, may not have this limitation.


How can I get dialin PPP services for my IPNetRouter network?

The router is actually a User Interface to configure forwarding in Open Transport, a routing protocol module to handle routing table updates, and a STREAMs module to provide proxy services (Network Address Translation) to allow multiple hosts to hide behind a single public IP address (single user ISP account).

For dial in capability, you must run Apple's Remote Access (ARA) server on a client machine. On the gateway Mac, when IPNetRouter is running, the ARA server dialin functionality should not be enabled. The two network applications conflict in the way that they use the TCP/IP control panel to route networks. However, this does not mean you cannot deploy a PPP dial in server behind an IPNetRouter gateway to access the Internet.

With MacOS 9, the ARA personal server is included. Hence you can easily create a "mini-ISP" dial-in service using an OS 9 client machine and have a remote computer connect to this server via PPP. This remote machine will then have direct IP access to all machines on your LAN as well as to the Internet through IPNetRouter functioning as the Internet gateway. The PPP dialin server and IPNetRouter just can't be running on the same Mac at the same time.


Can Filemaker Pro Server use more than one IP at one time on the gateway machine?

Unfortunately, Filemaker Pro Server was designed only to recognize the IP address in the TCP/IP control panel primary configuration. It cannot bind to more than one IP address. As far as we know, the FMP developers never considered the dual NIC case. For a shared server/gateway Mac, the only workaround we know of is to point your Appletalk interface at one NIC and use the primary, active TCP/IP configuration for the other.


What ports should I map to get Filemaker Pro Server to work through the gateway?

As described on the website you must map UDP and TCP port 5003 through the gateway. For more information on port mapping, see the "Inbound Port Mapping" section of the IPNetRouter guide.


Does IPNetRouter "multihome" Appletalk?

IPNetRouter does not effect your Appletalk network in any way. Whatever Apple permits Appletalk to do, it will do. What does this mean? This means that whatever interface is selected in the Appletalk control panel is the one on which Appletalk will be active. IPNetRouter does not use Appletalk, nor can it manipulate the Appletalk transport layer. If you are experiencing problems getting your Appletalk printer to work, it is extremely unlikely that it has much to do with IPNetRouter. The same goes for Filesharing over Appletalk.


What is MacIP?

MacIP is Apple's way of transporting TCP/IP packets over Appletalk. While IPNetRouter can send IP packets to a MacIP interface, IPNetRouter cannot send Appletalk packets themselves anywhere. The Appletalk Control panel determines where encapsulated MacIP packets are sent. An example of using MacIP is shown in our LocalTalk setup section.

Although MacIP is slower than straight IP on an Ethernet network, you might want to consider using MacIP for your Mac LAN clients in a single ethernet configuration to improve security.

According to Apple's technical notes, MacIP over LocalTalk is not supported in OS 9.


Since IPNetRouter does not multihome Appletalk, how can I get my Appletalk printer to be shared on a routed LAN?

If you have an Appletalk capable printer, you can use Apple's printsharing in many instances. You may also find Apple's unsupported Localtalk Bridge software to multihome Appletalk between an ethernet and a localtalk interface handy. Farallon and Asanté make Localtalk to Ethernet converters to put a localtalk printer on an ethernet network.


How come Software Updates and some installers do not work with IPNetRouter?

Due to limitations in Apple's OS, IPNetRouter must run as an application. This makes IPNetRouter incompatible with any installer or updater that requires all other applications to be quit during software installation. Fortunately, this incompatibility does not effect client machines behind your IPNetRouter gateway. You can test whether an installer or updater may be incompatible with IPNetRouter by running it on a client machine first. If the Finder Desktop is lost during software installation, it is not one you should run on your IPNetRouter gateway without first quitting IPNetRouter.

On your IPNetRouter gateway, you can work around most problem installers and updaters by quitting the IPNetRouter application and running the installer or updater as you normally would. After you have verified that the software has been configured properly, you may launch IPNetRouter and go back to using your Macintosh as a router/DHCP server again.


When is a good time to download IPNetMonitor?

If you are having problems getting your IPNetRouter configuration to work, we often suggest downloading IPNetMonitor to test for IP address conflicts. The PIng, Traceroute, Address Scan, Monitor window and DHCP Tools are particularly handy for troubleshooting network problems.

If you mention to your ISP that you have a tool that can scan address ranges, traceroute, and bind DHCP client addresses they may be more willing to help you troubleshoot over the phone. It also saves time in seeking tech support from us as we often request that you install this to help figure out what's right and wrong with your IPNetRouter one-way telco configuration.

For one-way telco cable modem users, we highly recommend downloading and familiarizing yourself with IPNetMonitor.

IPNetMonitor may show that performance can be improved on your internet connection or LAN. See the IPNetMonitor and IPNetTuner sections of our web site for more info.


How do I get x-windows to display on a LAN client?

X-windows uses ports 6000-6063 to communicate with display procs. If you map these ports to a LAN client, you should be able to get that client to work as an x-display terminal, provided you tell your remote Unix host that the x-display IP address is your public gateway IP address.

There is probably a way to get this to work for multiple clients on your LAN by mapping a subset of the above ports to different IPs, although we have not figured out how to do it as yet. If you figure out how, please submit an info support ticket explaining how to setup the remote display host. We'd love to share that info with other users!

One solution that appears to work is to use an SSH client session that supports X11 Forwarding to tunnel the X-display session between a LAN client and a remote OpenSSH or F-Secure session. Two client applications that support this type of forwarding are XFree86 and MacX 2.0.


Can I dial into AOL and use IPNetRouter to route to my private LAN?

No, IPNetRouter supports standard OT/PPP negotiation. AOL 5.0 and earlier uses a proprietary implementation of PPP to negotiate connectivity to AOL's servers. Consider getting a service provider that uses industry standard connectivity if you would like to use IPNetRouter for Internet sharing on your home LAN.

However, many AOL services are available over a shared internet setup if all you need is access to AOL on the internet, independent of an AOL dialup. This means that you can use many AOL services on a client machine behind an IPNetRouter gateway.


About Apple Remote Access (ARA) and OT/PPP

IPNetRouter supports ARA 3.x and OT/PPP for connecting your gateway to the internet. IPNetRouter does not support the dialin feature of ARA 3.x Server. Turn off the dialin feature if enabled.

OT/PPP 1.0.x is a derivative of ARA 3.0. You can download OT/PPP 1.0 from here. 1.0.1 was included with 8.1. ARA 3.x is available for installation as a client install on 8.5 and later MacOS installation CDs. Apple no longer appears to be selling ARA 3.0 software but you may be able to find copies in a local software store--3.0.x runs on all machines supported by OT 1.1.2. Both OT/PPP and ARA 3.x are scriptable although 3.x has many more supported commands. Versions of ARA before 3.0 do not support PPP and are therefore not useable by IPNetRouter as a dialup client. Version 3.1 support MS-Chap. Remote Access 3.5 server is included with OS 9. Remote Access 4.0, included with MacOS 9.1, no longer uses ASLM and appears not to be as scriptable as previous versions as a result; the latest version also appears to have dropped ARAP support.


Do you have any plans to integrate S/WAN into the router?

I've been following S/WAN with some interest as it seems like an ideal feature to include in a router making it easy to secure a stub network. I would like to include it, but I'm focused on doing other things first.


How Do I Share a LANTunnelBuilder Internet Connection?

If you want to share a LANTunnelBuilder 5.0.9a Internet connection, use the method described for EnterNet in the PPPoE chapter of the IPNR guide.


Can I get IPNetRouter to work with other Virtual Private Network software?

Yes and no. IPNetRouter supports some transparent IPSec and GRE client tunnelling schemes. In many cases, you can use at least a single client behind IPNetRouter's gateway to connect to a remote service. IPNetRouter does not usually support Virtual Private Network (VPN) connection as an interface directly on the gateway machine. Regrettably, you may have to get a non-VPN connection to the internet first if you require IPSec or GRE support for a client machine routed to by IPNetRouter.

In order to get a secure client machine connection to work, you may have to map certain ports in IPNetRouter. Version 1.5 and later has an exposed host feature that you can easily use to test whether port mapping is a likely solution for a VPN client you may be experiencing problems with. Some IPSec software, Interport's Mac client software for instance, can be configured to easily work behind any standards compliant NAT router, which IPNetRouter happens to be. See the "Inbound Port Mapping" section of the IPNetRouter Guide for more info.

We have considered implementing other methods of secure tunnelling on the gateway but have nothing to announce at this time.


How does your router compare with the VICOM Gateway (

IPNetRouter is Open Transport native, so it is much faster, and more compatible with other OT software. It's also simpler and less expensive. See also the router comparison web page.

Open Transport is based on Mentat/TCP, the same networking infrastructure used by Solaris. Mentat/TCP is already capable of forwarding (routing) within the kernel, but Apple hasn't enabled this yet. What I have written is a UI to configure interfaces and routing, and a proxy module to allow multiple hosts to hide behind a single dynamically assigned IP address. [Along with a set of IP tools I've already released]

In contrast, the existing VICOM product has to replace the network stack with its own PPP, PPPoE, and IP network code. This leads to an incompatibility between IPNetRouter and Vicomsoft IP driver engine. How to remove the Vicom driver is explained on the IPNR Troubleshooting web page.


How does IP addressing work on the gateway machine?
Where is the "mirror port"?

IPNetRouter doesn't need a "mirror port" because it is Open Transport native. VIG has its own IP stack which does routing and then presents one of its router ports to Open Transport as if it were a simple driver.

With IPNetRouter, the IP module in Open Transport does the routing and talks directly to the driver for each physical port on your machine.


How does your router work with OT1.3 and the IP Secondary Address file?

It may help to realize that IPNetRouter is mostly a configuration utility for sending IOCTL commands to the IP module in Open Transport. It is similar to the TCP/IP control panel, but exposes more features of Open Transport allowing you to configure and bring up additional IP interfaces.

The Configure Interface and Configure Routes window in IPNetRouter query the IP module in Open Transport to show the actual interfaces and routes that OT knows about. Based on this design, it doesn't matter what other programs may have configured IP interfaces. IPNetRouter simply shows the current configuration and allows you to modify it.

OT1.3 or later does not actually provide full IP "multihoming", the ability to be homed on more than one IP network as a user configurable feature. It provides what Apple has dubbed "single-link multihoming", the ability to have more than one IP address on a single physical network link. (See the Open Transport documentation from Apple for how this works.) IPNetRouter is not restricted in this way and allows you to configure IP interfaces on different physical network links, multiple networks on a single link, etc.

So to answer the question, it works just fine thank you.


Where can I find versions of Open Transport?

You can download Open Transport from the Older Software Downloads section of Apple's website.


Where can I learn more about DHCP?

See the "DHCP and MacOS" section of our guide for general information about DHCP on MacOS. IPNetMonitor now has DHCP tools that you can use to test any DHCP server from a PowerMac. How to use the DHCP Server feature of IPNetRouter is explained in the "Using The DHCP Server" section of the IPNR guide. There are links to other Internet resources referenced on those two pages.


Is There Any Benefit in Using IPNetSentry with IPNetRouter?

Yes. IPNetSentry's instant blocking and logging features can enhance the security of an IPNetRouter Internet shared LAN. See the IPNetSentry FAQ on our web site for more info on configuring IPNetSentry security software with IPNetRouter.