----------  Original message  ----------
Subject: Re: G4 MDD won't connect to internet
Date:    Saturday, 16. June 2012
From:    frrob <[email protected]>
To:      [email protected]
> Alex and Ken:
> 
> I did check all the physical connections, and they were fine. And again, as
> I mentioned in my original post, the machine reports being connected to
> ethernet, and gets a valid IP address, and "sees" the other Mac on the
> network.

Getting a valid IP is not an indicator of a good internet connection. It is 
merly a hint that the DHCP server works.

A DHCP server distributes IP addresses for all the computers in the network 
that connect to it. Having a DHCP server is one of the duties of the router.

A switch works on the hardware level of the IP protocol and as such it doesn’t 
make a difference if the computers are connected one on earch ethernet port of 
the route or through a switch.

> Also, the appropriate link and activity lights come on on the switch when
> the Mac is started.
> 
> The mac is getting the valid IP from the router.

So the ethernet part works. You get an IP. All should be fine, right?

> If it is a network config problem, then why do the other machines (B&W G3,
> windows boxen) connected to the same router via the same switch have no
> problem connecting? And how would I fix this?

Well, my router has the “feature” to “[allow|deny] internet access for new 
devices”. This would result in a similar behavier as you describe: the 
machines that are already known by the router (your other machines, B&W G3 and 
Windows PCs) are allowed internet access, whereas the new device, which 
happens to be your new Mac, is not.


As I’m saying, this is only one possibility.

I assume we are talking IPv4 here?

Other routers allow or disallow internet access for specific IP ranges, i.e. 
192.168.0.1 though 192.168.0.50 are allowed WAN, whereas 192.168.0.51 through 
192.168.0.255 are allowed LAN only.

(WAN = wide area network, i.e. everything external to the internal network, 
i.e. the internet)
(LAN = local area netork, i.e. your internel network, where you can “see” the 
other computers)


Note that some routers use different IP addresses, like 10.0.0.138.

You should see the setup of you router if you type its IP address in a browser 
(like Safari or Internet Explorer):
        http://10.0.0.138
        http://192.168.0.0



Though it could be also a configuration problem on the Mac OS X side of you new 
Mac, I think that the very likely explanation is a network (i.e. router) 
configuration problem.


In order to help:
1.) What IP addresses do your computers get from the router (through DHCP)?
2.) Which router do you use?
3.) What is the IP of the router and the IP ranges for the devices (via DHCP)?
4.) IPv4 or IPv6?
5.) Which Mac OS X is on the new Mac? Is it a fresh installation?


Cheers,
Andreas  aka  Mac User #330250

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