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Windows 7: Single Network Computer Cannot Access Internet

28 Jul 2013   #1

Windows 7 Home Premium x64
Single Network Computer Cannot Access Internet

Hello, this is my first post here and I apologize in advance if any information is missing or incomplete.

I recently set up an old linksys router to act as a wifi repeater using DD-WRT firmware. It appears to be functioning fine, except for the fact that the desktop computer I set it up with cannot access the internet. All of the other devices on the network have totally normal (and better, actually) access to the web. As I said, it appears to be working fine and I do have a thread open at the DD-WRT forums in the event of a router issue. At this point, however, the problem is isolated to my desktop, which I why I'm seeking help here.

What originally was happening was that I could access the WiFi network on said computer for a few minutes, then it would stop working, and I would have to switch to the other network (the original or the repeater, or vice versa) in order to get it to work again. That cycle repeated over and over. Today, it's not working at all, and won't let me access the internet through Firefox or Chrome on either network despite showing a full internet signal.

The computer in question is an HP p7-1020 running Win 7 64 bit. I have disabled and re-enabled the wireless network adapter. I have triple checked that it is set to automatic IP and DNS and not on static. I have tried disabling ipv6 and then later renabling it. I have released/renewed my IP several times. I have flushed the DNS. I have deleted and re-added the SSID. I have rebooted the computer traditionally and done a "hard" power cycle as well. All of these have offered no solution. I'm typing this post from my laptop, running perfectly on the repeater network, as it sits directly in front of the desktop that won't access the internet, which as you might imagine, is terribly frustrating.

I tried googling and searching the forums for a similar problem, but if one exists I must have been using bad keywords to find it. I'm really stumped as to what is going on, as I've tried everything I can think of to remedy the situation.

What might I try next?

My System SpecsSystem Spec
28 Jul 2013   #2

Windows7 Home Premium 32 bit

What are the 'other devices'?
Is the HP the only device running 7?
What's the router your using and what sort of set up options have you got after installing the firmware?
I had a very similar problem trying to get wireless up my shed. One time I thought it was fine, next, nothing yet my iPhone was 'seeing' the wireless signal just fine.
I faffed with the advanced settings in the AP, like the preamble, the beacon interval, antenna selection etc., and eventually got it working.
My System SpecsSystem Spec
28 Jul 2013   #3

Windows 7 Home Premium x64

As far as other devices:
  • iPhone 5
  • 2 Samsung Galaxy SIII's
  • Kindle Fire
  • PS3
  • HP Desktop running Windows Vista
  • Asus laptop running Windows 8
  • Toshiba Netbook running Windows 7 Starter
All of these devices can "see" and use both the original and repeated connection without any trouble. The repeater router is a Linksys WRT54G ver 6, and the original router is a Linksys E1000 that hasn't been edited at all.

As far as settings go on the WRT54G:

Wireless -> Basic Settings
Mode: Repeater
Network Mode: Mixed
(Added a virtual interface matching the original SSID but with _Repeater suffix.)

Security -> Firewall
Disabled SPI Firewall
Unchecked everything under "Block Wan Requests" except for Filter Multicast.

I think that's everything I've edited. I haven't edited the advanced settings at all, yet. I think I'm going to attempt booting in safe mode with networking to see if that helps at all. I'm also about to run (another) MalwareBites scan to cover that base.
My System SpecsSystem Spec

28 Jul 2013   #4

Windows 7 Professional 64bit

Network Posting Tips Follow this and reply.
My System SpecsSystem Spec
28 Jul 2013   #5

Windows 7 Home Premium x64

Alright, for anyone that comes across this thread in the future, I went to the post linked above by tomerello, downloaded the file FlushDNS.bat attached to the first post, ran it as instructed, and now everything appears to be in working condition.

If I experience further problems, I will let you know. Thanks to everyone for the help!
My System SpecsSystem Spec

 Single Network Computer Cannot Access Internet

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