No internet after sleep/shutdown

I put my imac to sleep every night and turn off cable internet at power button on top (Motorola surfboard cable modem). When I take imac off sleep, it will connect to Safari and Enourage but does not download pages or get messages - it takes forever. I can fix it by unplugging power at back for about 15 secs and then trying again and it works.
What I do now is I have computer NEVER SLEEP, DISPLAY SLEEP ON AFTER 30 MIN AND LEAVE MODEM ON. That works OK, but I do not want my computer being on all the time at night.
Any ideas - this has only been happening for about 6 months - Ok before that. Thanks Paul

IPv6 is next generation internet apparently. Not really used unless your ISP has adopted this protocol I would not worry about it.
Try turning off your cable box wait a few seconds then turn it back on, this usually works to stabilize your internet connection.
If that doesn't solve the problem repost your set up and maybe we can identify the problem.

Similar Messages

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    Welcome FIMuPhi198
    1. Go to Start > System Update > Install all critical and recommended updates.
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    Knowledge Base Document #106858, which is The Airport Troubleshooting Guide
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    I am having the exact same problem.  It started with 10.7, was fixed with 10.7.1, then came back again with 10.7.2.

  • Can't connect to Internet after sleep mode

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    I am trying other solutions today.
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  • Problem with internet after "sleeping"

    Hi.
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    Hello ghesser,
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    Wi-Fi: How to troubleshoot Wi-Fi connectivity
    http://support.apple.com/kb/HT4628
    Thank you for posting in the Apple Support Community.
    Best,
    Sheila M.

  • I5 iMac slow internet after sleep

    When waking from sleep my iMac has incredibly slow internet until I reboot it. Is this a known issue? If so, how do I fix it?

    Hello,
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  • MBP won't connect to Internet after sleeping

    Last night I woke up my MBP (2.2Ghz, 2GB RAM, OS X v10.5.6) and it wouldn't connect to the Internet. I thought it was a problem w/ the network itself and confirmed it by testing another computer. However, when the network connection was restored on the other computer, I still couldn't get my MBP to connect.
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  • Anybody else lose internet after computer sleeps?

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