Whitelist Java to provide better security and a better user experience

One of the best things you can do to improve your security in a corporate environment is to limit the use of Java, or whitelist Java. Undoubtedly there will be one or more legacy web applications your company uses that require Java, and it’s almost inevitable that at least two of them will be certified for one and only one version of the JRE, and it won’t be the same one.

Believe it or not there’s a solution to the problem of conflicting JREs, but it took me years to find it, because I had no idea that Oracle called it “Deployment Rule Set.” The secret’s out now. If you run Java, and you want security, you need Deployment Rule Set.

Read more

Model train won’t move? Here’s the fix

Model train won’t move? Here’s the fix

A common problem with HO, N, and other scales of electric train that run on DC power is that when you put them on the track, they light up but don’t move and instead make a weird noise. If your model train won’t move, I can tell you how to fix it. Here are my tricks for model train locomotive troubleshooting.

The cure is usually simple, involving switching a couple of wires.

Read more

Commodore 64 vs VIC-20

Commodore 64 vs VIC-20

How do you compare the Commodore 64 vs VIC-20?

The Commodore 64 and its predecessor, the VIC-20, look a lot alike, and the VIC-20’s design certainly influenced the 64. The 64 is the best selling computer model of all time, and I argue the VIC-20 was the first really successful home computer. The success of the two machines allowed Commodore to surpass Radio Shack as the sales leader in the computer industry. Yes, both Commodore and Radio Shack outsold Apple.

But even though the two machines are closely related, there are significant differences between them. It’s important to remember that in the 1980s, two years was a comparatively long time because the market was moving so fast. Plus, the VIC-20 was always supposed to be an entry-level machine. In 1982, the 64 was supposed to be fairly high-end. Let’s compare and contrast the two venerable machines.

Read more

How the Marx 1249 transformer connects to track

How the Marx 1249 transformer connects to track

There are four posts on the Marx 1249 transformer, but don’t fret if you’ve lost the instructions. Connecting it is easy. But first, you’ll probably want to check it out for safety before plugging it in.

There are two sets of posts on the transformer, but don’t let that confuse you. One set of posts powers the train, and the other set powers any accessories you might have, such as a station. If you don’t have any accessories, you can simply ignore the second set.

Read more

How I set up office hours in Google Voice

How I set up office hours in Google Voice

If you have a side business, you need to offer customer service, but it’s also perfectly reasonable to not want your phone to ring at 3 a.m. You can fix that if you set up office hours in Google Voice.

Fortunately it’s easy to set up Google Voice to allow your phone to ring during office hours and go straight to voice mail after hours. And the nice thing is, Google Voice transcribes your messages. This makes it very easy to filter out people who are calling you trying to solicit your services at 25 cents on the dollar. I can’t say for certain that people are more likely to do that at off hours. But it’s certainly more annoying to get awakened at 3 a.m. by someone wanting to lowball you. And yes, I speak from experience.

Here’s how you do it if you don’t want to be disturbed at unreasonable hours.

Read more

When will SSDs be cheaper than hard drives?

When will SSDs be cheaper than hard drives?

When will SSDs be cheaper than hard drives? Based on history, it’s possible to make an educated guess, and I’m going to do it.

Back in 2011, I noticed that historical hard drive pricing fell in line pretty nicely with Moore’s Law, and predicted that SSDs would do the same. I predicted that SSDs would reach 25 cents per gigabyte sometime in 2016, and was wrong. They hit that price in 2015. So I was late by a few months.

But I’m still willing to try to predict when SSDs will cost less than hard drives. I’ll predict when they’ll hit parity too. SSDs work differently from hard drives but their pricing trend is frighteningly similar.

Read more