The settings saved on this computer for the network do not match the requirements of the network

If you replace your wireless router with another one, your Windows machines may give you a red X along with this error message when you try to reconnect: the settings saved on this computer for the network do not match the requirements of the network.

The quickest, easiest fix is to forget the network and reconnect. Here’s how.

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Linksys EA6200 DD-WRT installation

I picked up a couple of refurbished Linksys EA6200 routers this past weekend. For whatever reason, DD-WRT isn’t officially supported on them, though it does seem to be a popular DD-WRT router. A lot of people make the upgrade far more difficult than they need to. With some simple hacks, Linksys EA6200 DD-WRT installation is pretty straightforward.

I came up with an 18-step process that I simplified just as much as I could. Unlike some methods I’ve seen, I don’t have you editing any binary files or creating custom startup scripts.

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Why MAC address filtering doesn’t help security

The other question that came out of my recommended DD-WRT settings was why not filter MAC addresses. I hate to be flip, but MAC address filtering doesn’t help, so why bother?

The reason is because your MAC addresses are broadcast as part of the network traffic, and it’s unencrypted. So your MAC addresses aren’t any secret at all. So it doesn’t do any good. One could argue it doesn’t do any harm. But it adds an extra step every time you put something on your wireless network. Why go to the inconvenience if you don’t gain anything from it?

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Why hiding your SSID makes your security worse

I got a couple of questions about my recommended DD-WRT settings, but I’m going to start with the question about why not to hide the SSID. It actually turns out that hiding your SSID is bad for you, and makes your security worse. I’ll explain.

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Recommended DD-WRT settings

I’ve been asked a few times now for my recommended DD-WRT settings, or at least my good-enough settings. I think that’s a great idea, so I’ll walk through how I configure a DD-WRT router. Follow these steps and I can almost guarantee you’ll have the most secure network on your block.

For the purposes of this tutorial, I am going to assume you are configuring DD-WRT as your primary router.

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Password management advice from CSO Online

Over at CSO Online, there’s a nice war story about tracking down and resetting 300 passwords.

I could pick nits at a few of his details, but that’s annoying and counterproductive. His overall advice is very good–manage your passwords, set them to something random, keep in mind that some sites just won’t allow for a very strong password so do the best you can, and protect your main e-mail password and your password management system password with all the diligence you can muster.

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Change a headline, go to prison

A former journalist whose track record includes being fired from the Tribune Co. and from Reuters is facing two decades in prison for giving the hacking group Anonymous credentials to log into a Tribune web site and change stuff.

Anonymous changed one headline, and it took about 40 minutes for someone at Tribune Co. to notice and change it back.

It reminds me of something that happened at the newspaper where I used to work.

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New password advice from GCHQ

The GCHQ is the British equivalent of the NSA. They recently published a new document containing the GCHQ’s new password advice in light of the things we’ve learned in the last few years. It’s worthwhile reading, whether you’re a sysadmin or a web developer or just an end user who wants to stay secure online.

Some of the advice may be surprising.

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