My Macbook Pro cannot connect to the internet using an ethernet cord.

My Macbook Pro cannot connect to the internet using an ethernet cord. It was working fine for weeks, then all of a sudden just stopped. What could the problem be?

Hi bean07670,
If you are having an issue with the Ethernet connection on your MacBook Pro, you may find the following article helpful:
Mac OS X: Troubleshooting a cable modem, DSL, or LAN Internet connection
http://support.apple.com/kb/TS1317
Regards,
- Brenden

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Just bought MacBook Pro, cannot connect to the Internet at home. I have wifi at home and my iPad and cell phone can connect to the wifi

Just bought MacBook Pro, cannot connect to the Internet at home. I have wifi at home and my iPad and cell phone can connect to the wifi

*** When you post for help, please state which OS X is installed.
If you aren't sure, click About this Mac from your Apple menu 
Troubleshooting advice can depend on that information.

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Hi! Please help me. We have an internet WIFI connection in our office but only my MacBook Pro cannot connect even when I entered the correct password. My Iphone and Ipad work just fine. It says "connection timeout" but all other laptops can connect. I tried network diagnostics already and it always say "connection timeout". I dont know what to do anymore.

Yes, and when I open the Network Utility it shows a working IP address, and a 54Mb/s speed from the wireless router. It even shows the shared computers from my roomates. But when I try to access the internet it does not load anything on Safari or Firefox ( or any other internet application for that matter). It is completely unconnected. YET, As soon as I activate the AirPort card on the top right where I have my signal strength, it shows on the Network Utility information that there are 'packages' being sent and received, and I have NO programs open what so ever, I have closed everything except finder and network utility... Does this mean I am being hacked, or have some sort of Trojan or something in my computer? I ran an antivirus that my school provided, called Virex by McAfee, it came out clean except it says it cannot read one file.
I tried repairing my disk, and that did not work either. I did the Ram reset like you suggested, but that also did not work. I doubt it being a hardware error. I am going to try to connect it to an ethernet cable to see if that will work. Then I will let you know what happens with that, but that would still not be a solution since I need it wireless, cause the router is in another part of the house.
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MacBook Pro Cannot Connect to the Internet

My MacBook pro was perfectly active and online, in my linksys router last night before I went to sleep. I left it active as I was downloading some files, they were going awfully slow, but I didnt pay attention and left up. When I woke up today, and tried to use my computer it seemed to be kind of slow and frozen, so I forcefully shut it down and then powered it on. Everything was normal, and my airport card connects to my network, as it is supposed to do. I try to load Safari, Mail and even Firefox, but nothing works. All my other programs seem fine. I started running Virex to see if it detects anything, but I dont know what is happening.
I have made sure that my network is working, since 3 of my roomates use the same internet from the same router, and they all have internet. Even my iPhone has internet. Everything is working except my MacBook pro.
So, I tried going to preferences and getting a renewed IP and DHCP server, like I do when the computer is lagging a little bit, it did not work either. I have reset again, by using normal reset setting on Finder. Still no Internet, I have no clue what do or why it's happening, this has never happened before, and I do not think is anything but my computer software.
I appreciate any help and suggestions. Thank you very much.

Yes, and when I open the Network Utility it shows a working IP address, and a 54Mb/s speed from the wireless router. It even shows the shared computers from my roomates. But when I try to access the internet it does not load anything on Safari or Firefox ( or any other internet application for that matter). It is completely unconnected. YET, As soon as I activate the AirPort card on the top right where I have my signal strength, it shows on the Network Utility information that there are 'packages' being sent and received, and I have NO programs open what so ever, I have closed everything except finder and network utility... Does this mean I am being hacked, or have some sort of Trojan or something in my computer? I ran an antivirus that my school provided, called Virex by McAfee, it came out clean except it says it cannot read one file.
I tried repairing my disk, and that did not work either. I did the Ram reset like you suggested, but that also did not work. I doubt it being a hardware error. I am going to try to connect it to an ethernet cable to see if that will work. Then I will let you know what happens with that, but that would still not be a solution since I need it wireless, cause the router is in another part of the house.
Thank you for your help, and I hope we can get this sorted out.

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What makes you think that you are connected to the internet then?
Try:
- Resetting the iPod. Nothing will be lost.
Reset iPod touch: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Power off and then back on your router
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The PC Repair Guy,
If you haven't already, verify that you can connect to the internet through some other means such as Wi-Fi or Ethernet with your laptop to rule out any network setting issues. If you are able to connect successfully to the internet, use that opportunity
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I am having difficulties connecting to the wi-fi in my apartment. I was able to connect to the internet just yesterday, and it worked perfectly fine. When I try and connect to my wi-fi, there is a check mark next to the router name, however the wi-fi symbol on the top portion of my computer displays an exclamation point, stating that there is no internet connection.
I have tried restarting my computer, restarting my router, and tried running network diagnostics.
The internet is also working perfectly fine for my roommate; my computer is just having difficulties connecting to the internet, which is odd because it worked perfectly fine yesterday.
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Hello there, chellingtons.
The following Knowledge Base article offers up some in-depth steps for troubleshooting Wi-Fi connectivity:
Wi-Fi: How to troubleshoot Wi-Fi connectivity
http://support.apple.com/kb/HT4628
Thanks for reaching out to Apple Support Communities.
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Pedro.

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I also had several problems using WPA passwords in Europe but found ethernet connections worked fine. Some WPA connections worked without problems. While somewhat annoying I managed with the ethernet when necessary.
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Cannot connect to the internet using wireless, but dhcpcd passes...

Thanks for reading this in advance
So, I'm trying Arch Linux (going from XP/Ubuntu) on my desktop since all my friends at the university have been migrating to Arch, and even I loved the concept, and even installed it on a VirtualBox without problems.
Problem is I don't have a network card in my desktop, only a wireless one. So I NEED to get this one working. Ubuntu 9.04 delivered support for this card (SMC EZ-Connect USB 2.0 blabla, I'll save you on the details) so I tried Arch and after a LOT of googling and help from a friend, I managed to build a pkg to install the wireless firmware that was lacking to the p54usb module, and finally my wireless card was detected and appeared in ifconfig/iwconfig
However, after doing all the steps in the Arch Linux Begginer's Guide for configuring wireless, when I get to the last step (after using "dhcpcd wlan0" to acquire the IP from my wireless router, with sucess) that involves pinging just to test the connection, it fails. Unknown host. I've tryed almost everything and don't know the problem...
I'll post some of the details here from the commands I've used.
ifconfig wlan0
wlan0 Link encap:Ethernet HWaddr 00:04:E2:DE:C4:ED
inet addr:192.168.0.13 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:229 errors:0 dropped:0 overruns:0 frame:0
TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:47510 (46.3 Kb) TX bytes:2160 (2.1 Kb)
iwconfig wlan0
wlan0 IEEE 802.11bg ESSID:"ZON-B5D2"
Mode:Managed Frequency:2.437 GHz Access Point: 00:24:8C:B1:BB:5B
Bit Rate=1 Mb/s Tx-Power=27 dBm
Retry min limit:7 RTS thr:off Fragment thr:off
Encryption key:8888-8888-8888-8888-8888-8888-E5 Security mode:open
Power Management:off
Link Quality=45/70 Signal level=-65 dBm Noise level=-93 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
ping -I -c 3 www.google.com (or any other derivate of this command)
blablabla unknow host www.google.com after a long while
iwlist wlan0 | grep "ESSID"
all the networks in my range according to my laptop running Vista/Ubuntu 9.10, so fine here :)
dhcpcd wlan0
connects to my router, everything is fine and I get the 192.168.0.13 atributed to my for 3600 seconds, and the program forks to the background. All fine I think?
ping 192.168.0.13 (the IP my desktop is using from dhcpcd)
PING 192.168.0.13 (192.168.0.13) 56(84) bytes of data.
64 bytes from 192.168.0.13: icmp_seq=1 ttl=64 time=0.066 ms
64 bytes from 192.168.0.13: icmp_seq=2 ttl=64 time=0.053 ms
64 bytes from 192.168.0.13: icmp_seq=3 ttl=64 time=0.024 ms
ping 192.168.0.1 (my router IP according to dhcpcd)
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
From 192.168.0.13 icmp_seq=2 Destination Host Unreachable
From 192.168.0.13 icmp_seq=3 Destination Host Unreachable
From 192.168.0.13 icmp_seq=4 Destination Host Unreachable
From 192.168.0.13 icmp_seq=6 Destination Host Unreachable
From 192.168.0.13 icmp_seq=7 Destination Host Unreachable
From 192.168.0.13 icmp_seq=8 Destination Host Unreachable
--- 192.168.0.1 ping statistics ---
8 packets transmitted, 0 received, +6 errors, 100% packet loss, time 6999ms
, pipe 3
Now I noticed that while starting, when Arch is at "initializing network components" or w/e, I get a short DHCP timedout thing...
I have this in /etc/rc.conf
LOCALE="en_US.utf8"
HARDWARECLOCK="UTC"
USEDIRECTISA="no"
TIMEZONE="Europe/Lisbon"
KEYMAP="pt-latin9"
CONSOLEFONT=
CONSOLEMAP=
USECOLOR="yes"
HOSTNAME="metabrain"
INTERFACES=(wlan0)
wlan0="dhcp"
gateway="default gw 192.168.0.1"
ROUTES=(!gateway)
DAEMONS=(syslog-ng network netfs crond)
I'm posting this from the same machine, running Ubuntu 9.04 and I have wireless here (and way stronger signal than in my Windows XP partition )
Thanks for your time
Last edited by MetaBrain (2010-04-10 18:51:14)

ewaller wrote:It may be redundant to your rc.conf file, but could you post the output of 'route' ??
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 * 255.255.255.0 U 305 0 0 wlan0
(this last line took a while to print. the kernel hang here for more than 20 secs... relevant?)
default 192.168.0.1 0.0.0.0 UG 305 0 0 wlan0
I've checked everything, dunno what I'm doing wrong

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== yesterday ==
== User Agent ==
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# Select both '''Cookies''' and '''Cache'''.
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NB200 Can connect to wireless networks, but cannot connect to the internet

I have been able to connect my Win XP netbook to my secure wireless network at home, other people's networks and public networks like the library and McDonalds. This week I'm away from home and discovered that while I can still connect to a number of different wireless networks, I cannot connect to the internet using Internet Explorer.
I've had this problem once before and fixed it by reinstalling Windows XP and all my other software. I have no idea why it has happened again. I'm hoping for a less drastic solution to the problem..?

Hi Nakia,
> I cannot connect to the internet using Internet Explorer.
Have you tested other browsers like Mozilla Firefox and does this work?
As MasterG wrote try to renew the IP address using the commend line.
Last week I had a similar problem and I could solve it by updating the WLAN driver. Just remove the driver, restart the notebook and install the newest one. :)

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Hello, my sister her macbook pro cannot connect to our wireless internet. My imac however can, so the problem has to do with her laptop. We were wondering how we could solve this problem? Thank you very much in advance!

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My Macbook Pro cannot connect to the internet using an ethernet cord.

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