Odd network (and Firewire) problems cured by unplugging iMac

I experienced a weird problem with my May 2005 20" iMac G5 running 10.4.2. In October I suddenly lost the ability to connect with one of my computers but not the other. I could connect just fine to the G4 Powerbook running 10.4.3, but could no longer connect to my G4 tower running 10.2.8. The iMac would spend several minutes trying to connect and then the message I got was that the server did not exist or something similar, or sometimes it would say that the version of AFP on the G4 tower was incompatible (I hadn't changed anything). I could still connect from the Powerbook to the G4 tower without any problem so I knew that the tower was OK, and all of the computers were able to print normally through the laser printer on the network. My workaround was to transfer data between the iMac and the tower by going through the Powerbook, but this was a pain since it took twice as long.
Of course I tried rebooting the iMac a number of times, but this did not help. I was thinking it was a software corruption of some sort, and was thinking of wiping the hard drive and reinstalling the whole system (fortunately I hadn't gotten around to doing that yet).
This problem persisted for about 2 months until I also realized that my Firewire ports weren't working either when I tried to hook up a new external Firewire drive. The Firewire ports did not even appear under system profiling. I had a very hard time locating info about troubleshooting the Firewire ports, but finally came across the suggestion to unplug everything from the computer, unplug the iMac from the power and leave it off for a while.
This unplugging cured the Firewire problem and also cured the networking problem!
(I don't know why this worked. I keep the iMac plugged into a UPS to protect it against power outages if that makes any difference.)
(The network configuration: iMac and Powerbook connect to Airport Express via Airport extreme, and the Airport Express is connected to the G4 "Digital Audio" tower through an 8-port Ethernet switch (which also connects to laser printer, a PC, and another very old Mac.))

Chime,
Good news for you. Actually, it's an emphatic YES!
Every ISP I've ever used had fine print explaining that multiple computers require multiple accounts. The interpretation of this is: Every computer you want to have assigned a PUBLIC IP address from your ISP requires it's own account. If you try to get clarification, your ISP will argue it, they want you to pay them more money for unnecessary accounts!
You only need one PUBLIC IP address from the ISP in order to establish internet sharing throughout your house. Your gateway will establish PRIVATE IP addresses for the computers on your home network.
Plug the phone cord into your Base Station (if it has a dial-up modem), the base station then becomes the one PUBLIC computer allowed on your ISP. Configure it to dial out on demand. It becomes the gateway between the internet connection and your internal network.
This is completly legitamate as long as you are sharing over an "in-your-own-home-for-personal-use-only" PRIVATE IP LAN behind your ONE gateway connection.
Not familiar with the new Base Stations, all the older ones had modems. The base station with a modem IS the most convenient way to do this (esp. for dial-up) and provides the best firewall security for the whole network. However, if yours doesn't have a modem, it's still possible to establish internet sharing using one of your computers as the gateway to dial-out and share the connection.
BTW - if BB options are limited, have you considered satellite options (DirecPC, etc.)?
Mark

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http://discussions.apple.com/thread.jspa?threadID=383931&tstart=0
Re: External Hard Drive Problem
Posted: Feb 28, 2006 7:11 PM in response to: Jkalmeda ( http://discussions.apple.com/mailpost.jspa?messageID=1830549 )
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Why reward points?(Quoted from Discussions Terms of Use.)
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Members may reward you with 5 points if they deem that your reply is helpful and 10 points if you post a solution to their issue. Likewise, when you mark a reply as Helpful or Solved in your own created topic, you will be awarding the respondent with the same point values.

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