Internet does not work. Modem is fine. iMac is fine. SOS!!!

My iMac is connected to the internet via ethernet. For some reason my internet doesnt work anymore. I went through all the diagnostics and went through all the proper steps provided on the homepage of safari to try and get working myself. NOTHING. I then called my ISP and had them remotely check and see if they can work it out and they said,"It was not an issue with their hardware they can see, nor and issue with their line. You should take your iMac to get it checked."
I did. I went to the Apple retail store in Escondido, Ca. and like always they were awesome! They checked my iMac and ran all the diagnostics that they have in-store. They even connected it to the ethernet cable that they had. INTERNET!!! Everything checked out clean and with no issues, Even my non Apple ram that I installed. I then went to the ISP and even exchanged my modem for a brand new one with new cables. Went home and nothing. short of pulling my hair out I scheduled an appointment for the ISP to come and take a look at the issue. The tech even pulled out his laptop (which was not apple) connected the ethernet and wala!! INTERNET. For the next 45 mins he toyed with the settings and tried to work his way around the computer and I got nothing, just a handshake and in a regretful tone, like my dog failed to make it home from being lost across country, "I'm sorry, but you still have no internet." I am currently at work, but when I get home I am going to reformat my computer and reinstall snowleapord and see where that takes me.
Thanks,
Chris

Wait, don't reinstall yet.
Hi, this has worked for a few...
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.7…
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
10.5.x/10.6.x/10.7.x instructions...
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
For 10.5/10.6, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
208.67.222.222
208.67.220.220
Click OK.
Also, turn off IPv6:
System Preferences » Network » Ethernet » TCP/IP tab » Configure IPv6
Or whatever Interface you use.

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~~~~~~~~~~~~~~~
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Last edited by handy (2008-10-18 00:14:44)

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Please help! Just purchased my new ipone 4. I have wireless conection at home, the phone finds it, I enter the password, it seems like it connects to it, but I only get the wireless icon for a few seconds and when I open Safari it says that internet is not available. When I check the Ip, it shows 169.254.118.54. I have a PC and an ipod touch connected to the same wireless and they work just fine... Can you please help with some advice? Thank you soo much!

Thank you. It didn't work unfortunately :((
Here are my router's details (Huawei):
Product name HG655b
Device ID 00E0FC-21530307237S0B028701
Hardware version VER.C
Firmware version V100R001C02B018
Batch number RWC3P0.010.29066
Physical address 5C:4C:A9:A5:41:B0
System up time 0 days 0 hours 15 minutes 56 seconds
I don't have Mac filtering enabled.
Now it doesn't even find the wireless network anymore...
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Internet does not work after kernel upgrade...

I have been reading all of the other threads and have tried everything possible to downgrade my kernel to 2.6.26 rather then 2.6.27. I have found a package for kernel 2.6.26.2-1 and nvidia 173.14.12-2 but they do not mix and wont let me start x when i downgrade both of them. Is there some way i can get past this as not having internet is frustrating
Edit:
I have tried using this
echo 0 >/proc/sys/net/ipv4/tcp_sack
echo 0 >/proc/sys/net/ipv4/tcp_dsack
and it did not work, i have also tried downgrading dhcpcd and that didn't work so i'm assumin git is infact the kernel.
Edit again:
When downgrading both the kernel and nvidia with those two packages i found, my computer boots up fine up untill i get to the command line to type "startx". The i get this error message after typing "startx" :
Error: API mismatch: the nvidia kernel module has version 173.14.12, but thus nvidia driver component has version 177.80. Please make sure that the kernel module and all NVIDIA driver components have the same version.
After i got this i went and reinstall kernel 2.6.27 and the latest nvidia to look at the nvidia package i had installed. I extracted it and all the was in it was a hierarchy of folders "/lib/modules/2.6.26-ARCH/kernel/drivers/video/nvidia.ko" and that nvidia.ko file. Is it possible that i'm not installing the driver jsut a kernel module?
Once again... Edit lol:
Also i found a package for nvidia-utils and installed it with nvidia and the kernel and i can "startx", but it freezes everytime and i have to manually restart the computer with the reset button
Last edited by opeth115 (2008-10-19 22:03:56)

I use nvidia96xx legacy drivers with no trouble, so I'm not sure I'll be of much help. I did read the announcment that nvidia no longer supports a certain card/cards, and there is a new legacy driver in the repo. Maybe you need to be using that one?
Also, I wasn't effected with any issues with the new kernel, but I did have a small issue with dhcpcd shortly after the kernel upgrade. It kept failing when trying to connect to the Internet. It was a simple fix though. I compared my /etc/conf.d/dhcpcd with /etc/conf.d/dhcpcd.pacnew and there was a significant difference.
I was using the string....
DHCPCD_ARGS="-N -t 30 -h $HOSTNAME"
I just needed to change it to the string in dhcpcd.pacnew....
DHCPCD_ARGS="-q -L -t 30 -h $HOSTNAME"
Anyway, sorry if this doesn't help.

Internet does not work. Modem is fine. iMac is fine. SOS!!!

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