MacBook Pro and Ethernet

Hello guys,
So in the past few days I've been trying to connect my macbook pro to the ethernet and failed everytime. I use a cable that I connect to my Mac and on the network preferences it says that the ethernet is connected but I don't have internet. The ip is one of those 169 and no matter what I do it doesn't work. I also tried it in my work and it doesn't work either, so I am thinking is something to do with my computer. I have 10.8.3 and I never use the ethernet so I don't know if it worked before or not. What do you recommend?
Thanks!

HerPortrait wrote:
... I use a cable that I connect to my Mac and on the network preferences it says that the ethernet is connected but I don't have internet.
That means the device at the other end of the Ethernet cable is not supplying your Mac with an IP address. That's all your Mac knows.
Translated into English, this means you have to fix the device at the other end.
I don't have acess to the router,
You will be unable to fix this problem until you do.

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Educated guess. The networking devices have priorities as to which are used. The standard order is that Ethernet has a higher priority than Airport.
While your Ethernet is unplugged it is inactive and the Mac ignores it. Once you plug it in, the Mac sees that it is active and switches traffic to that interface.
I actually take advantage of this feature at home, but configuring my Airport and Ethernet with identical fixed IP addresses. Normally I'll use Airport, but if I'm copying a huge file and I want faster performance, I'll just walk my MacBook (previously iBook, previously Powerbook) over to my Ethernet switch and plug in my MacBook. Magically, the Mac detects that the Ethernet is active and continues the file transfer uninterrupted over the faster 100baseT Ethernet connection. When the transfer is finished, or if I really need to move back to the Comfy Chair, I unplug the Ethernet cable, and all activity reverts back to the Airport, all without disrupting any existing networking connections.
You on the other hand have totally different settings for your Ethernet and your Airport, so when you switch to Ethernet, you basically loose your Airport connections.
Something you can try:
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MacBook Pro
- Mid 2010
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Routers
Netgear WNDR3300
Firmware up to date
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DCHP, NAT, UPnP only on one.
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I consider myself very tech savvy, of course that is opinionated. At this point I am clueless because of the randomness of the connection refusal and how all other devices are ok.
Not sure if I mentioned it but if I try to recconect to the netowkr after it drops it either says "Timed out" on Mac or "Unable to connect" on iPhone.
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This is version 5.
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well ok, for some this might sound ridicule. Why should I still be using a 13 year old PowerBook. Let me tell you, this is writing/typing heaven, Zen-like; no distractions at all, no twitter, no internet (although possible), no emails just pure you and your text and if you spin down the HDD, absolute silence. as said before pure Zen writing heaven. and on top of that you're typing on the best keyboard ever on a laptop.
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Since I Installed Snow Leopard on my MacBook Pro 17" I just haven't been able to establish a connection between the two machines.
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My PowerBook 1400cs/166 runs on 8.6 and I use a Global Village Platinum PCMCIA card (modem and Ethernet combi card). this setup worked perfectly with 10.5 but I have not been able to make establish a connection since running 10.6 on my MBP.
I am really desperate since I heavily depend on being able to exchange files between those two machines through an ethernet connection.
So I kindly ask anyone who might be able to help me to please consider posting any solutions or at least ideas which could help me with my problem. I really would greatly appreciate any effort whatsoever.
Thank you very much for your time.
EDIT:
What I forgot to mention: strangely enough, when I enable Internet Sharing on my MacBook Pro (through Airport) to Ethernet, my PowerBook 1400 can connect to the internet without any problems.
Message was edited by: Apolloss

First of all let me thank you very much. It actually works (partially).
There seems to be a problem though. While I can connect perfectly from my MBP 10.6 to my PowerBook 1400, the other way round doesn't work.
My MBP does not show up in the Network browser of OS 8.6 but I could life with that.
The problem is that if I try to connect to my MBP from my PB1400 by entering the IP directly a alert message appears reading that the "User Authentication Method required by this server can't be found, please check the AppleShare folder in the Extensions folder and try again".
Do you have any clues what I'm doing wrong or where the problem may lie?
PS.
Even if you may not be able to further help me with this problem, I ow you a great deal of gratitude and am very thankful for your help so far. At least I can exchange files between the two machines and that's what I needed in the first place.

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I would suggest you upgrade your computer's OS minimally to Snow Leopard 10.6.8.
Upgrading to Snow Leopard
You can purchase Snow Leopard through the Apple Store: Mac OS X 10.6 Snow Leopard - Apple Store (U.S.). The price is $19.99 plus tax. You will be sent physical media by mail after placing your order.
After you install Snow Leopard you will have to download and install the Mac OS X 10.6.8 Update Combo v1.1 to update Snow Leopard to 10.6.8 and give you access to the App Store. Access to the App Store enables you to download Mountain Lion if your computer meets the requirements.
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       1. Mac computer with an Intel processor
       2. 1GB of memory
       3. 5GB of available disk space
       4. DVD drive for installation
       5. Some features require a compatible Internet service provider;
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Upgrading from Snow Leopard to Lion or Mountain Lion
You can upgrade to Mountain Lion from Lion or directly from Snow Leopard. Mountain Lion can be downloaded from the Mac App Store for $19.99.
If you sign into the App Store and try to purchase Mountain Lion but the App Store says your computer is not compatible then you may still be able to upgrade to Lion per the following information.
A. Upgrading to Mountain Lion
To upgrade to Mountain Lion you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion from the App Store. Sign in using your Apple ID. Mountain Lion is $19.99 plus tax. The file is quite large, over 4 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
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         See App Compatibility Table - RoaringApps.
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If your computer does not meet the requirements to install Mountain Lion, it may still meet the requirements to install Lion.
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MacBook Pro and Ethernet

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