13 Replies Latest reply: Sep 9, 2010 6:37 PM by genobenda
skazac Level 1 Level 1 (0 points)
Internet connection fails via HS cable to modem to ethernet configuration
G5 2.5, OSX 10.4.11, Safari .... also tried Firefox
Cable installer technician made several attempts to configure Network System Preferences
All wires and external modern are new
I am still able to connect to internet via phone; Dial up

Two PC laptops connected successfully via same HS cable to modem to ethernet config
Connection with laptops required only resetting modem, without Network System Pref adjustments

G5 2.5, Mac OS X (10.4.11)
  • BDAqua Level 10 Level 10 (120,060 points)
    Hi skazac, and a warm welcome to the forums!

    Is that Interface dragged to the top of Network>Show:>Network Port Configurations and checked ON?

    Then... Try putting these numbers in Network>TCP/IP>DNS Servers, for the Interface you connect with...

    208.67.222.222
    208.67.220.220

    Then Apply

    At the Apple Icon at top left>About this Mac.

    Then click on More Info>Network, then click on the Ethernets on the right, any info there?
  • DaddyPaycheck Level 6 Level 6 (16,035 points)
    Is the Ethernet jumper between the Mac and the router new?

    Have you tried leaving the telephone cable disconnected from the Mac when trying an Ethernet connection? Have you tried a different port on your router?
  • skazac Level 1 Level 1 (0 points)
    Internet connection failure Part 2: Power Mac G5 (tower)



    Thanks for the welcome and your assistance




    About This Mac > More Info... > Network
    Lots of data here, seems to match info:
    System Prefs > Network > Built-in Ethernet >TCP/IP


    Network > Network Status
    • Built-Ethernet : Built-in Ethernet is currently active and has the IP address
    71.239.164.212. You are connected to the Internet via Built-in Ethernet.

    Safari :
    sits blank to any http typed, with progress bar frozen

    You are not connected to the Internet.
    Safari can’t open the page “http://www.google.com/” because your computer isn’t connected to the Internet.


    .... Activity Monitor reads: 2.35 KB/sec ( and is fluctuating ) to 6.88 KB/sec



    Assist me .... > Network Diagnosis
    Network Status ( all LED are green )
    • Built-in Ethernet
    • Network Settings
    • ISP
    • Internet
    • Server

    Proceeding through the navigation buttons, all is Green
    Final Message Reads: Your Internet connection appears to be working correctly.


    .... Activity Monitor reads: 2.56 KB/sec ( and is fluctuating )



    Network Utility > Ping test
    .... 10 packets transmitted, 7 packet received, 30% loss


    I tried installing an Ethernet card into expansion slot,
    absolutely No Response ( blank read-outs) in System Prefs > Networks < TCP/IP
    • Encore Electronics ( $ 20.00 returnable )
    • ENL832-TX-EN
    • 10/100 Fast Ethertnet Network Adapte
  • DaddyPaycheck Level 6 Level 6 (16,035 points)
    Try that new cable yet?
  • skazac Level 1 Level 1 (0 points)
    Internet connection failure Part 2: Power Mac G5 (tower)



    I tried your suggestions, with no results.

    Thanks for your assistance
  • skazac Level 1 Level 1 (0 points)
    Re: Internet connection failure Power Mac G5 (tower)

    yep, 2 new cables and sprayed the port with air
  • old comm guy Level 4 Level 4 (2,235 points)
    Your G5 seems to think it is connected to Internet but your browsers aren't convinced. On your Network preference panel for your Built-in Ethernet connection, click the PPoE tab and make sure Connect using PPoE is not checked.

    Just a thought.
  • BDAqua Level 10 Level 10 (120,060 points)
    Open System Preferences>Network>Configure>Proxies Tab, make sure none are set, like for HTTP & HTTPS.
  • skazac Level 1 Level 1 (0 points)
    Re: Internet connection failure Power Mac G5 (tower)


    Thanks to everyone for the quick response & suggestions.


    The issue was resolved.
    I by-passed the internal ethernet port via an USB / ethernet adapter ( $24.95 ).

    Happy camper now !
  • BDAqua Level 10 Level 10 (120,060 points)
    Good to hear, thanks for the report!
  • Donovan Kruger Level 3 Level 3 (535 points)
    I don't think that buying a USB/Ethernet adaptor resolves the issue of your ethernet not working.

    I suddenly am having the same problem with my dual 2.5 G5. I've run TechTool Deluxe and don't have any errors to report. However, the ethernet port is simply not working. I haven't changed anything on my network. I can't even connect to the router. All other networked devices are fine.
  • DelSF Level 1 Level 1 (0 points)
    Me too! I've been trying to figure out why it suddenly stopped recognizing that it's actually connected to internet (I get a green light for built-in ethernet connection) but safari says that I', not connected.

    I thought it must be because I'm running Mac Leopard Server software on it, but this has been installed for past 3 years and has always connected no problem.

    Message was edited by: DelSF
  • genobenda Level 1 Level 1 (0 points)
    I thought I was losing my mind. I too cannot connect to the Internet. Got a G5 donated and bought a USB wireless adapter to eliminate a long ethernet cable across the room. Followed all the specs and procedures, got a connected green light on the network presences as well as all green lights and connections with the wireless USB. Set up manual settings with DHCP and get a green connection, green network, and even green ISP. But cannot connect to Internet. Mac Mall is telling me that the USB is defective but I think not.
    Then I decide to run a 25' ethernet cable across the room and again, same thing! Green lights and connected status but cannot connect to Internet. I do not know what to do.