Computer Tips -Tech Info

I remember many years ago watching a Dr. Who episode where a very important key was “hidden” in a display of many other keys. Kind of like hiding a tree in a forest. This concept is “security by obscurity”. Generally this is considered a bad approach to security. It is a bad approach if this […]

I’ll confess to having a lot to learn about IP ethernet networking. I feel pretty comfortable with basic TCP/IP (v4), the concept of UDP vs. TCP ports, ICMP pings, etc… but ARP is something that I haven’t dabbled much with. It is, of course, a layer that TCP depends on. When a machine sends a […]

There are ways that risks can be avoided. Recently, there was what was called a zero-day exploit for Internet Explorer. As I write this, the exploit surfaced 3 weeks ago and tomorrow there will be a patch. The vulnerability would allow remote code execution through a vulnerability in the way javascript is handled. So, for […]

I REALLY like secure shell (SSH) for remote access to linux machines. You can do more than just a “telnet” like remote shell with it. (Port forwarding.) However, the default configuraton for the openssh-server is sometimes a bit less tight than I would like. For that reason on a new install, I usually like to […]

Once upon a time I did an article about the biggest computer security vulnerability ever. I’ve also passed along the old “the most dangerous part of a car is the nut behind the wheel” joke. If you haven’t got it yet, the computer user can be the “weakest link”. Let’s face it, you’ve got antivirus, […]

I’ve talked about Antivirus software as an essential. Today we’re going to look at Antispyware software. There is a difference. By definition a virus is a piece of software that infects other files or copies itself. A worm is a virus that spreads without user intervention. (From one open network port to another for instance.) […]

Alright, so you’re still reading this series and you’re thinking. Look, I’m not protecting national security secrets. All I’m doing is (running a business|emailing my grandkids|using the web for research). True, good point. You’re not at the defense department. OK. Let’s say you just use your computer for email and web browsing. That’s low priority […]

In a small, trusted network you might be able to get away with weak passwords for file sharing for instance. What’s a weak password? Anything you might find in a dictionary. Most people don’t realize this, but there are programs designed to crack passwords. They’re designed to take a dictionary file and run through it […]

Once more into the breech… Ok you’ve taken account of the software and services on your pc. The next thing we need to talk about is knowing your network. Do you have any wireless access points? Not sure? Print servers? How many pcs? Are any of them portables? Public access? Are all of them secured? […]

Deep breath time. We’ve covered a lot of good topics and it’s important at this point to take a close look at what we’ve talked about and think. “Am I overwhelmed?” If so that’s fine. Maybe you don’t have enough time to think about all of this network security stuff. Maybe, no matter how hard […]