Sometimes machines stop working, or you install a new piece of hardware and just can’t boot again. That’s when you have to get back to some basics to troubleshoot what the problem is. Yesterday I saw a machine that wasn’t booting. It would display the splash screen and then power down. They had a new video card on a previous diagnosis using the indicator lights on the back (Dell). The add on card seemed to work, but the system was just not booting. Someone had suggested to them that it was a power problem.
Category: Hardware
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USB flash drive with electronic paper display
Just saw this over at engadget. It’s a Lexar jumpdrive with “amount filled” indicator. The twist is the “amount filled” is done with electronic paper. What this means is that you can see how full the drive is without plugging it into a pc. The electronic paper doesn’t draw power to hold the display.
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The Google PC and OS
Rumors have been around for some time about Google launching Google OS, an Operating System to compete with Microsoft Windows. Well…. now the rumors are circulating around the Google PC (with Google OS). The Latimes.com is reporting that Google has been meeting with people from Wal-Mart (and others) to distribute a cheap pc. This would be a Google PC running something other than Windows – Google OS….
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Blackberry Security Hole
There’s another security warning out related to specially crafted image files. This time it’s targetted at the blackberry, which is a small portable email/pda device. Basically a corrupted TIFF may lead the user to be unable to view other image attachments. The US-CERT advisory seems to indicate that remote code execution could be possible, although there is no comment to this issue from the makers, Research in Motion.
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The D-Link DWL-800AP+ as a wireless repeater to extend wireless range – Part 7
So, according to D-Link there is a short list of access points that the DWL-800AP+ will repeat for. They are all d-link branded access points. It seems that there have been firmware updates to improve the compatibility with more models (of d-link access points.) Some of the incompatibilities have been with WEP encryption from what I’ve read.
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The D-Link DWL-800AP+ as a wireless repeater to extend wireless range – Part 6
Ok, so here’s the synopsis… I’ve spent the last few articles setting up a D-link DWL-800AP+ as a repeater for a linksys WAP11 (v. 1.1) As of the end of the last entry I had a bit of a problem with WEP but that seems to have been resolved now and here I am to fill you in on what went wrong. It was really a simple mistake. When I copied and pasted over from the linksys….
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The D-Link DWL-800AP+ as a wireless repeater to extend wireless range – Part 5
So, I set a WEP key on the linksys (WAP11 v. 1.1) and it promptly disappeared… it stopped responding (over the WIRED network) to my wap11gui admin tool. I quickly realized that part of the problem is from having two network cards attached (both in the 192.168.0 range)… disconnect the usb card and reconnect. Then I use the “security” tab to enable WEP (128-bit)
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The D-Link DWL-800AP+ as a wireless repeater to extend wireless range – Part 4
Ok, so now I had to add the new D-Link’s MAC address to the list of authorized MAC’s in the Linksys WAP11 (v. 1.1) For this, I call on wap11gui. Used to (since I use linux), I would have to suffer through a Windows boot on the laptop and balance the laptop on the edge of the bed and connect through usb to the linksys… now I can just administer it from my desk. Nice… Anyway, I log into that and Visit the “security” tab and “Authorized Mac”, and add the d-Link DWL-800AP+ to the list.
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The D-Link DWL-800AP+ as a wireless repeater to extend wireless range – Part 3
So, now that I was “in” the DWL-800AP+ it was time to see if I could set it up as a repeater. I visited the “wireless” tab of the web based configuration and chose Repeater mode instead of AP mode and saw that I would need the Mac address of the access point that I wanted to “repeat” signal from. In this case it’s the old Linksys WAP11 v. 1.1 So, I opened up a console and (as root) did an arpping 192.168.0.250 (the ip address of my Linksys AP). Got the reply back and typed it in.
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The D-Link DWL-800AP+ as a wireless repeater to extend wireless range – Part 2
For starters, I hooked the D-link DWL-800AP+ up and connected it through a crossover cable to my usb network card. That way I could access it exclusively on one adapter and look online for information with the other adapter, which came in quite handy. The first thing I found was that by default the dwl-800ap+ was configured to use 192.168.0.30 as it’s IP address. This one was not configured with the default settings. (Used / via ebay….) So, I did an nmap -sT 192.168.0.* -e eth1 which scanned the whole 192.168.0. list of addresses using my eth1 adapter (as opposed to the default adapter eth0)