This page has all the info I have collected on using Cable/DSL modems
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12/3/1999 DHCP issues with OS 8.6 and OS 9: Many cable modem and DSL modem users have had issues using DHCP to conect to their service provider. The most common issue is a lost connection after 10min or so or pauses every 10min or so. The main problem is with the OpenTransport that comes with these OS's. OpenTransport seems to try and renegotiate an IP address license very often which disrupts the connection. There are 2 remedies for this until Apple can fix it.
1. instead of using DHCP you can set your IP manually. This has worked for a lot of people including me. As long as you have a static IP address you can manually set yout TCP/IP control panel and then you'll never have your Mac try to negotiate a new IP address which cuts the pauses and lost connections conpletely. At least the DHCP related one :)
2. If you don't have a static IP address or if manual is not working for some reason (I had one 6400 user not able to connect to Arizonas US West DSL with a manual setting in OS 8.6) you can revert to an older version of OpenTransport. I would only do this if DHCP and manual settings don't seem to work. You can do a custom install of OT from an OS 8.5.x CD. 1st choose Customize then deselect every option then choose custom install from the Mac OS 8.5 line. Now open up the Networking and Connectivity folder. In here you will find OT. Also if you wish to use AppleSharing then I suggest you also install that to make sure they are all compatible versions.
I know #2 will work if you have OS 8.6 installed and you revert to OS 8.5's OpenTransport but other variations might not? If you want to try it I suggest making a backup first. I think the reason Manual did not work for this user was because US West's service does not require a DNS server name. Without a name server address your computer cannot locate anything online. Somehow with DHCP this is not a problem for US West?
12/10/1999 MacInTouch's Router info page: I found this link to MacInTouch's info regarding internet routing solutions for the Mac. Very informative if you wish to get several Macs (or PC's) running over one internet connection.
Update on USWest's DSL service: The user I know that has the USWest DSL service here in AZ I mentioned in my last Just Update also reminded me of another problem she was having. The way USWest implements its service (without the need for a DNS server address in the TCP/IP control panel) also disables the Time & Date internet synchronization and the QT4 streaming features. This is not very good as who knows what else will break with their service. She is in contact with them right now and hopefully they can fix it.
DHCP / Manual IP setting: I also wanted to remind DHCP users that even though your IP address is not guaranteed as "static" it just might be static enough to allow for the fixes I posted earlier. Cox says they might never change my address unless they need to switch me to another node as load builds. This means you can manually set your IP address and in the event you notice your connections not working, just switch back to DHCP long enough to get the new IP address that will appear in the TCP/IP control panel. Then switch back to manual and type in the new IP address.
Cable/DSL router info: Speaking about these, I just found on Accelerate Your Mac some info on routers to let multiple Macs and PC's share one cable/DSL IP number.
[I just bought a G4/400 Sawtooth so here my 0.02 worth ;-)
I have an ADSL at home hooked up to the MacSense XRouter ($245.99 at http://web.hardwarestreet.com/bin/catalog/getProdPage.cgi?sku=120713) - PowerMac 8500, PowerBook 3400, Windoze98 Celery 400Mhz (;-)), and a Hitachi PC Laptop. No problem sharing the 1.2Mb/sec (150KB/sec) download.
I am considering the Linksys Cable/DSL Etherfast 10/100 Router ($179.66 at http://www.cdw.com/shop/products/default.asp?EDC=196823) for the ADSL at work. The setup appears similar to the Macsense XRouter, i.e.- use a Web browser to easily configure your setup. Not sure about the auto-negotiation however...
2/18/2000 Apple Talk issues with Cable Modems!: I found this page on MacFixIt's web site that is discussing issues people are having with Apple Talk and owning a cable modem. It seems that some of the cable companies are upgrading their equipment which is allowing Apple Talk to cross over into other peoples houses and if someone in your neighborhood is running an Apple Talk server then this may cause problems for your Apple Talk network. Click here to read all about it.
I have not been affected yet as I cannot see any other Macs or printers in my Chooser so maybe COX has not upgraded in my area yet? It seems the only fix for now is to notify your cable provider and hope they shut down the user with the Apple Talk server or get a software/hardware router to isolate your local network.
DHCP issues with Cox Cable modems: recently I have been using OT 2.6 for DHCP with my Cox Cable modem because the OT that shipped with OS 8.6 had issues with DHCP. Well it seems that DHCP does not work for me at all anymore. Even if I reinstall the older OT? I thought it might have been something related to installing OT 2.6 but no one else that installed it had complained about this. But I did just get a letter from Michael who also has Cox Cable and he has the same problem. Sounds like Cox has changed somthing and DHCP no longer works for Macs? I can connect manually with no problem just like he can but I will have to call them and find out what happend.
[Something you may find interesting. My internet access is through COX Cable. MACs are inherently lower than DOS machines by the way. I have a DOS lap top and my Performa connected via a local hub. The difference in speed is amazing. Anyway, I have to set the TCP/IP on both machines to a static (manual) configuration. They do not work in the dynamic (automatic) configuration which is the preferred set up of COX Cable.
Thank you for your time.
4/8/2000 Linksys help page: Here is a page with good setup info for the Linksys Cable/DSL modem router
7/16/2000 RoadRunner service in Florida and OS 8.6 DHCP issues: I have posted many times by now how OS 8.6 has problems with DHCP and cable/DSL modems. Mark sent me some info from RoadRunner on how to possibly solve these issues for their service. Thanks Mark. It may also work for other services? Note, I have OT 2.6.1 posted for download which also fixes certain DHCP issues with OS 8.6, but maybe not this same issue?
[I've been using the RoadRunner cable modem service with my 6400 with Sonnet 240MHz G3/L2 and OS 8.6 for a month now with no problems. I've been using the version of OT that comes with 8.6. I noticed some info on your site concerning DHCP problems. Here are the suggestions for Mac users from RoadRunner. Thanks, Mark
"MacOS 8.6 Update - Road Runner of Central Florida strongly recommends that all subscribers using MacOS 8.5 and MacOS 8.5.1 system software upgrade to MacOS 8.6. Installing the update will eliminate an incompatibility with Road Runner's DHCP servers, and the upgrade is free to all licensed users of MacOS 8.5.x. You can download this 34.3 MB file directly from Road Runner's servers in a fraction of the time it would take you to download it from Apple Computer's Web sites.
* MacOS 8.6 TCP/IP Options control panel - Some subscribers using MacOS 8.6 system software have reported problems with very large downloads (100MB+) and instant messaging clients such as America Online's Instant Messenger. When Road Runner's DHCP servers renew client IP addresses, these users' TCP/IP sessions may be interrupted briefly. Although the TCP/IP session is reestablished almost immediately, large downloads may be aborted and instant messaging sessions may be interrupted in the interim. These problems can generally be resolved by installing Apple's TCP/IP Options control panel and checking the checkbox next to "Don't retain DHCP lease on shutdown." (To install this control panel, download it, decompress it with Stuffit Expander and drag the decompressed file -- TCP/IP Options -- on top of your system folder. You'll get a message that the file needs to be stored in the Control Panels folder. Click OK. You should then be able to open this control panel and check "Don't retain DHCP lease on shutdown." You must restart you computer for the changes to take effect.)"]
2/24/2001 Another 6400 site devoted to helping you take apart your system and some good DSL info: Rav sent me a letter to inform me of his new site called 640Open that has some nice info on taking your 6400 apart. He also has some very good instructions on hooking up a DSL modem. Thanks Rav.
4/21/2001 Getting CU-SeeMe to work through a router: John sends some info on how to get CU-SeeMe to work through a hardware router. Basically it seems that you need a special router to do this and most hardware routers won't work :( Thanks John.
He wrote back telling me which ports are needed to be opened for CU-SeeMe. Thanks.
5/5/2001 More router info from John: John sent me some good info on which router worked best for using video conferencing software. He just sent me some info on why certain routers may work better then others. Thanks John. Click hear to read his letter as it was rather long.
8/18/2001 Issues with getting a Mac to work with a Linksys router: A reader had issues of not being able to connect to the internet after installing a Linksys router and the fix was either adding a second Name Server (DNS) Address or filling in the Additional Search Domain info? After doing both of these with his @Home cable service, he was able to access the internet through the router. I thought that others may be having similar issues and wanted to let you all know :)
COX@home service usually gives you two Name Server (DNS) Addresses that look like 24.x.x.33 and 24.x.x.34 where x.x are numbers for your particular location. But they all seem to end in 33 and 34
Their Additional Search domain address look like chnd1.az.home.com for my location. The beginning of the address represents the area you live in.
So if you are having trouble and you do not have info similar to this entered in your TCP/IP control panel, then find the info for your area and give it a try. Not sure about DSL service but I assume they do something similar.
5/23/2002 Ethernet issues with an interesting fix!: Todd was having issues getting an ethernet connection with his 6400 through a Linksys router and found a simple solution that worked. Thanks Todd.
I am not sure why this worked but maybe he had one of the cables in the uplink port by mistake before?
10/15/2002 PacBell DSL Enternet software issues with Opentransport 2.6 install available from my site: I reader of my site tried the OT 2.6 software I have posted that fixes a DHCP issue in OS 8.6, and said his DSL network access software no longer functioned afterwards. Later he wrote back to say that just reinstalling the access software fixed it. Thanks for the info.
Later he wrote back with the fix.
Usually software like this will actually alter your OT drivers or hook into them in such away that changing the OT drivers breaks the special software. This can also happen from just upgrading your OS as that will also replace the OT drivers with new ones.
11/2/2002 Another solution to fix Enternet DSL issues. Using a router: I had noted on a previous update that a DSL user had issues with the Opentransport software I have posted because it interfered with his Enternet software. Reinstalling the Enternet software fixed it for him but VRic has a more permanent solution that is good for any cable/DSL user. Thanks VRic.
Basically this is good info for any user that needs special software for an internet connection with Cable or DSL services. The software is basically used for what is called PPPoE which means PPP over Ethernet. This allows for authenticating the user on the ISP's network. By doing PPPoE in hardware via a router, you get rid of the need for special software and no longer have to worry about that when doing any OS upgrades. Also for those with multiple computers, a router can allow all of them to share one IP address which can save you money :)
OpenTransport 2.6 for older OS's to fix DHCP issues1/21/2000
OT 2.6 from OS 9.0-
OT 2.6.1 from OS 9.0.4-
Well most of you may know that Apple released OT 2.6 to fix a denial of service attack that OS 9's OT created and it also is supposed to fix the DHCP issues in OS 8.6 and 9. Well OT 2.6 is advertised as only for OS 9 users and OS 8.6 iBook, iMac DV and G4 owners so that leaves us 6400 cable/DSL modem users stuck. Wrong. I haven't tried the OT 2.6 on my 6400 yet but I am running it right now on my B&W G3 and it runs great! I can get online and use Apple Talk with no issues so far so it is compatible with older systems.
The installer although will not install it on older Macs :( TomeViewer did not work either because the installer file is not a typical Apple tome :( so what did your favorite 6400 Zone guy do? I placed the files on the web for you to download and try for yourself :) I included the 2 OT 2.6 files plus the Apple Talk and TCP/IP control panels from OS 9 in case they were needed? I am running OS 8.6 and just dragged out all six old 2.0.3 OT extensions and dragged over the two new OT 2.6 extensions and all is fine. If you have problems with Apple Talk after this then try the ones I supplied. I don't know if this will work for older OS's but on OS 8.6 and a B&W G3 it does. I will try the 6400 soon. OS 8.5.x and older do not have the DHCP issue so OT 2.6 is not really needed for them anyway.
I placed OT_26.sit on Apples new iDisk (thanks Apple) so let me know if you have trouble getting it to download. Apple just gave me a free 20M of web space. Wasn't that nice of them :)
1/29/2000 OT 2.6 under OS 8.6 update: Joe wrote to let me know he is having a memory leak using OT 2.6 under OS 8.6 on his Yikes G4. Below is an email discussion I had with him. Thanks Joe. This is the only report I have of this issue so far.
> Thanks very much for the great tip regarding installing Open
> Transport 2.6 on Macs running Mac OS 8.6. I have a G4/400 (Yikes!
> motherboard with PCI Graphics Card) and it came with Mac OS 8.6
> installed as well as Open Transport 2.0.3. The Open Transport 2.6
> installer would not install on my G4 (I assume it will only install on
> Sawtooth G4's and iMac DV's with Mac OS 8.6 installed). I use a Road
> Runner (soon to be AOL I fear) cable modem and after reading your tip on
> Open Transport 2.6, I downloaded the files you posted, removed the six
> Open Transport 2.0.3 extensions and installed the two OT 2.6 extensions
> and restarted.
> To my pleasant surprise, I seem to be getting much faster download
> speeds with the new version of Open Transport installed. In getting the
> Game Sprockets 1.7.3 updater from the Apple web site, the download
> topped out at over 450k/sec. Prior to installing Open Transport 2.6 I
> never saw download speeds over 300k/sec. THANKS Joe!
I checked my B&W G3 and my 6400 and neither seem to have a memory leak but like I said I use RD on both which might mask the issue. I haven't tried without RD yet and I asked Joe to try VM and see what happens. Email me if your having this issue.
Well not everyone is having this issue. John writes that all is perfect with OT 2.6 under OS 8.6 on his 6400. Thanks John. He is having trouble with RD 9 though :(
[I thought I'd let you know about my experience with OT 2.6 on 8.6. I tried it first on my iMac (8.6 US). I used Conflict Catcher to disable the OT network group. Then I installed the files you made available (all four) and rebooted. Everything loaded and worked the first time. On my 6400 I upgraded to 8.6 (French) and then followed the same procedure. As with the iMac it loaded and worked the first time. Both machines seem to have consistantly faster and more stable dialup connections.
John Gunnison firstname.lastname@example.org
PS. re: RamDoubler 9 with 8.6. Thinking that Ramdoubler 9 would do no harm I updated the iMac. After several unexplained program crashes, unreleased program memory, and slower window refreshes I retrograded to RD 8. The problems went away. I didn't benchmark the system so I can't give you any statistics but there were clearly negative effects.]
4/29/2000 DHCP info from Apple: Here are 2 links to Apple TIL info on their DHCP implementations. From reading them it sounds like OS 9's OT reverted to the same DHCP licensing scheme used in Pre OS 8.6 systems? This may be why OT 2.6.x work so much better again?
DHCP behaviors with Mac OS's
Apple registration may be required to view the above links?
I had left a post on my forums asking if anyone was interested in trying OT extensions from OS 9.2.2 in an older OS since these extensions greatly increased online speed for me with my cable modem when I installed OS 9.2.2 on my other Macs. Maurice requested to try them on his 6500 running OS 9.1 and he says they work great! Thanks Maurice.
If anyone else would like to try, you can download them from here. Please do not trash your old extension in case these cause problems for you! I also include the AppleTalk and TCP/IP control panels because generally they are all tied together so you would need these with the newer OT extensions. Also AppleShare extension is included to go with the newer Apple Talk control panel. Please email me your experiences with these. Thanks.
9/1/2002 More user info from using Open Transport 2.7.9 in earlier OS's: I received two user reports on OT 2.7.9 in earlier OS's. Thanks guys. Robert noticed speed improvement while Len did not? I don't know how either of them connect to the internet but its possible that this may only increase the speed of ethernet connections?
Tom, The Texas MacMan, sent me some info he found on using Yahoo's DSL internet connection on his 6500. Personally I prefer a cable modem as setup is much simpler but for those that have no choice and must use DSL for high speed internet, this information should be of grate value! Thanks Tom.
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This page last updated 5/25/2004