Just switched from Qwest DSL to CableOne cable internet and now my mac won't connect to the internet.

Question

Just switched from Qwest DSL to CableOne cable internet and now my mac won't connect to the internet.

I've spent 2 hours on the phone with CableOne and they can't figure our why my MacPro isn't connecting to the internet through their Arris modem. I can connect to my network and see all my computers... so the ethernet port is working but the internet won't connect. I've tried Safari and Firefox browsers. My PC connects using the same ethernet cord with no problems. I've also tried connecting the computer directly to the modem with no results. And the ethernet port says it's connected and gives me an ip address. I'm out of ideas at this point. Any suggestions?

Mac Pro, Mac OS X (10.6.8)

Posted on Aug 27, 2011 12:42 PM

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Answer 1

sig

Level 8

35,862 points

Aug 27, 2011 12:57 PM in response to the racing life

Connect your Mac and the modem. Power down the Mac and the modem. Then power the modem, wait 30 seconds, then power the Mac.

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Answer 2

Aug 27, 2011 1:34 PM in response to sig

No luck. Same results.

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Answer 3

Linc Davis

Level 10

209,535 points

Aug 27, 2011 1:42 PM in response to the racing life

Are you connecting through a router? If so, does it have a DHCP lease?

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Answer 4

Aug 27, 2011 2:39 PM in response to Linc Davis

I've taken the router out of the loop. The mac is now connected directly to the Arris modem. (One thing to note is that the Arris modem is also a router in itself.)

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Answer 5

Linc Davis

Level 10

209,535 points

Aug 27, 2011 3:05 PM in response to the racing life

OK, then does the modem show that it has a DHCP lease? It would have some sort of web page with status and settings.

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Answer 6

Aug 27, 2011 3:14 PM in response to Linc Davis

Yes... it says the DHCP lease time is 3600.

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Answer 7

Linc Davis

Level 10

209,535 points

Aug 27, 2011 3:27 PM in response to the racing life

Open the Network preference pane and click the "Assist me" button. How far do you get?

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Answer 8

Aug 27, 2011 6:09 PM in response to Linc Davis

I get as far as it telling me to restart the modem then contact a system admin.

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Answer 9

Linc Davis

Level 10

209,535 points

Aug 27, 2011 6:22 PM in response to the racing life

In the Network preference pane, please click the Advanced button and select the TCP/IP tab in the sheet that opens. What does it show? Post a screenshot if you prefer.

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Answer 10

Aug 27, 2011 6:37 PM in response to Linc Davis

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Answer 11

Linc Davis

Level 10

209,535 points

Aug 27, 2011 6:51 PM in response to the racing life

That looks OK. Launch the Network Utility application and select the Ping tab. Enter "www.apple.com" (without the quotes) in the address field and press return. Post the output.

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Answer 12

Aug 27, 2011 7:42 PM in response to Linc Davis

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Answer 13

Linc Davis

Level 10

209,535 points

Aug 27, 2011 8:02 PM in response to the racing life

Now try pinging "8.8.8.8".

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Answer 14

Aug 27, 2011 9:08 PM in response to Linc Davis

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Answer 15

Aug 27, 2011 9:36 PM in response to Linc Davis

Forget that last post... with all the troubleshooting I just realized I still had it plugged into my router. My Mac is now plugged directly into to Arris modem. I did all the steps as you mentioned before with the same results except the last ping of "8.8.8.8". Here is the screen shot of that ping:

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