Diary of a Network Geek

On this day in 1951, my profession was, essentially “born”.

Today marks the anniversary of the unveiling of the UNIVAC, the world’s first commercially produced and available electronic digital computer in the United States. The first electronic computers were invented during World War II by the military. Engineers in Great Britain invented the Colossus computer to help break Nazi codes, and engineers in the United States invented the ENIAC, to help calculate the trajectories of missiles.
The ENIAC used 17,468 vacuum tubes, 7,200 crystal diodes, 1,500 relays, 70,000 resistors, 10,000 capacitors and around 5 million hand-soldered joints. It weighed 30 tons, was roughly 8 feet by 3 feet by 100 feet, took up 1800 square feet, and consumed 150 kW of power. The ENIAC radiated so much heat that industrial cooling fans were needed to keep its circuitry from melting down. It took two days to reprogram it for each new task.

The men who created the ENIAC decided to go into private business for themselves, and it was on this day in 1951 that they unveiled their first product, the UNIVAC I, the world’s first commercially available electronic computer. It was quite an improvement over the ENIAC, using a mere5,200 vacuum tubes, UNIVAC I weighed just 29,000 pounds (or 13 tons), consumed 125 kW, and could perform about 1,905 operations per second running on a 2.25 MHz clock, which was the fastest calculation rate in the world at the time. The Central Complex alone (i.e. the processor and memory unit) was 14 feet by 8 feet by 8.5 feet high. The complete system occupied more than 350 square feet of floor space.
The first customer to buy the UNIVAC was the United States Census Bureau, and the computer was used to predict the presidential election of 1952, after early returns began to come in. It correctly predicted that Eisenhower would win. Originally priced at $159,000, the UNIVAC I rose in price until they were between $1,250,000 and $1,500,000. A total of 46 systems were eventually built and delivered.
Thomas J. Watson, the chairman of IBM at the time, thought that computers, with all their incredibly complex vacuum tubes and circuitry, were too complicated. He famously said, “I think there is a world market for maybe five computers.” But with the invention of the microchip in 1971, all the processing power of those thousands of vacuum tubes and punch cards could suddenly be crammed into a space the size of a postage stamp. Within a decade, the first personal computers, or PCs, began to appear. Ironically, Apple made them popular and inexpensive enough for the home user and drove what we think of as the computer revolution.

But, it all started with UNIVAC. So, happy birthday, big guy. Thanks for being just delicate enough to keep me working!

My users think I’m a magician or a sorcerer.

Frankly, I’m not sure which is better.
In any case, this week I finally cleaned up the last remnants of some nastiness that one of my users got himself into. He followed a link from Google search results to what seemed like a perfectly legitimate blog. He was looking for some poetry reference in the Sex In The City movie. (Yeah, I know, I know. A big, tough oil industry service guy looking for poetry in a chick flick. Go figure!) Well, when he got to this blog, it had an embedded player with what it claimed was a clip from the movie. But, when he went to play the clip, it told him he needed to update his Flash player and provides a “helpful” link. That’s when all manner of unholiness broke loose on his computer.

Well, he got updated, all right. With spyware and virii. I lost count of how many and what kind there were. One changed his time and date format to include the text “VIRUS ALERT!!”, so that it appeared next to the time on his Taskbar. Another made his main hard drive, his “C” drive, disappear from his My Computer! And, at least one of these was the FakeAVAlert trojan, but I never did figure out which one scrambled his My Computer. The funny thing was, after running every anti-virus and spyware removal tool that I normally use, the drive was still hiding somewhere. But, he was running from that drive just fine! Well, I searched for a day or two, while doing the rest of my normal gig, but never could find why this had happened.
I did, however, find a fix. TweakUI from the Windows XP Power Toys. I loaded that on his computer then went in to it under the My Computer section and, sure enough, the local drive was shown as being hidden. I corrected that and **SHAZAM**!!
UPDATE: It occurred to me this morning, after posting, that I should let you all know how to fix the clock issue in more detail.  The setting is found in the Control Panel, under Regional Options, which is not quite intuitive.  Under Regional Options, choose Custom, then find Time and adjust the format per the screen instructions.  If you’re in Windows 2000, once Regional Options is open, choose the Time tab and adjust accordingly.

Yep, just like magic, I am.

At least, as much as you can secure anything.

Some time back, I pointed you all toward an article about extending your wireless connection. Some of you expressed concern regarding security in relation to wireless connections in general and, specifically, after expanding the range of your wifi router. So, I thought I should get you all some links on how to batten down the hatches, so to speak.
I do think it’s important, though, to say a little something about security in general first.
Nothing is totally secure. If a computer is on a network, it can be compromised eventually, given enough time and money. Security is a matter of degrees, of balancing ease-of-use with peace-of-mind. And, while having wifi makes mobile communication easy, it is, by it’s very nature, insecure. Anything that broadcasts over an unsecured medium can only be so secure, you know? So, I think it’s important as you look at the links below to keep in mind that a determined attacker is going to get into your wifi network, no matter what you do. And, personally, I am more than a little paranoid, so there are just some things I wouldn’t do over a wireless network.

Okay, so, without further ado, here are the links:
First, if you don’t mind the pop-ups on About.com, here are Ten Tips for Securing Your Home WiFi Network. They’re not bad, but, really, some of them aren’t all that secure. Or, rather, they just give a somewhat inflated sense of security. Still, they’re better than nothing.
Better than those tips, though, is the Lifehacker Guide to Setting Up a Wireless Home Network. This takes you through setting up a wifi router and network from scratch and gives you fairly good tips about securing it along the way. (But, make sure to follow the link to their article ToDo – Secure Your Wireless Home Network!) Better still, follow the article at Ars Technica titled The ABCs of Securing Your Wireless Network.
Freakishly, Microsoft, who’s not known for their security practices, has an article about making Windows XP wireless a little more secure. If you run XP, it’s worth a look.
And, finally, for those of you with a little extra time, some spare computer resources, and a high level of paranoia, read the Step-by-Step Guide at SearchWindowsSecurity.com titled How To Create A VPN For Your Wireless Network. (Or, if you’d rather download a printable PDF, check out TechRepublic’s A Secure Wireless LAN Hotspot For Anonymous Users. It’s another way to do the same thing.) Frankly, it doesn’t get much more secure than that!

Hopefully, that gives all those curious minds out there enough to chew on to keep you off the streets at night!

I am, however, a Level 5 Perl Monk.

Monday, I was informed that I had gained enough experience to be granted the status of Beadle, or Level 5, on PerlMonks.org as of Monday morning. Now, this may not mean much to you non-geeks, but for Perl geeks this is really something. Granted, it’s not as impressive as getting that rank in a week or getting all the way up to Level 13, which gets you listed on the “Saints in Our Book” node, but it does represent a certain achievement in my book.

And, yes, I will still be working toward higher levels. ‘Cause that’s just the kind of geek I am.

I love OpenSource software.

I especially love it when it’s free. I love free extensions for OpenSource software I use on a regular basis, too. Microsoft Office isn’t the only game in town and people do develop for OpenOffice.

If you haven’t yet, check them out.

Well, more precisely, extending your wifi signal.

Not too long ago, I bought an antenna for my wifi router, in an attempt to broaden the range of my laptop in my own house. I could barely get a signal in my bedroom. Outside, on the back porch, I could only get a signal if I sat with my back to the yard! Well, unfortunately, before I could even test the antenna, my router fried and I had to get a new one. Luckily, the new LinkSys wifi router had better signal coverage, so I didn’t need the extra help.
But, if you still do, or just want to get a little bit more out of your wireless router, this article on ZDNet titled Expert tips on extending your home WiFi range has some good suggestions.

I have a dream.

I want to make money, without selling, day and night.
Basically, I dream of what everyone who’s ever done any freelance programming or creative work of any kind dreams of doing. I want to have a product, or automated service, that people pay for and that I don’t have to keep after all the time. Originally, I thought I might manage that with a couple of really killer books, but, at the rate I’m going, that’s a long way off, at best. Then, I thought I’d found it with the plugins I’d written for WordPress, but, alas, it was not to be. It still might happen with some really good themes for WordPress, but, honestly, I doubt it.
But, if you dream of that, too, then check out Creating Passive Income for Freelancers over at FreelanceSwitch. And, for a larger, less specific look, see The Global Microbrand.
This is my dream.

There’s something about this that appeals to me.

When I was fresh out of college, I won a trip to Long Beach with a bunch of amenities. A buddy of mine and I went, since we were both single, and enjoyed ourselves, in spite of the worst rainy season the greater L.A. area has seen in more than 20 years. I mean, roads would shut down after we’d use them, forcing us to find another way back to the hotel and I think we only two days of sun. The day we arrived and the day we left.
But, what I remember most was a t-shirt I saw at a tourist shop on Catalina. It was a Parrothead shirt that had the lyric “I used to rule my world from a payphone” on the back, with a nice, relaxing picture of a hammock between two palm trees. The idea of being so unattached, free and mobile really appealed to me, but, alas, it’s a life I’ve never known.

Now, what does that have to do with a USB drive? Well, thanks to Lifehacker, more than you’d think. Have you ever thought about how nice it might be to travel with all your information and favorite applications, but leave your laptop behind? Yep, free and easy living. All you need is a good-sized USB thumb drive and three articles: Top 10 USB Thumb Drive Tricks , Carry Your Life On A Thumb Drive and Tiny USB Office (via LifeHacker). That’s it. Your key to carrying your life in your pocket. Well, your digital life, at any rate.

And, before you write this off, I know a guy who did just what they describe. He loaded everything that mattered to him on a thumb drive and had no computer at all for more than a year. Of course, now, he has a MacBook, so you can take that with a grain of salt. But, also, according to ZDNet, Microsoft is coming out with a product to help you do all this via their suite of programs and operating systems called “StartKey“. You know when Microsoft gets behind an idea, you’ll see it implemented, one way or another.
So, do you all think you could do it? Could you make the switch?

I think I may not ever buy a new PC again.

Notice, I didn’t write that I’d never buy another computer, but, rather not another PC. Hear me out. With prices the way they are, laptops are so cheap that I could easily find one in whatever price range that I might set for myself, within reason. I mean, MicroCenter always has laptops in their sale fliers. Not to mention every one else who sells them. And, what’s more, in recent years, laptops have come configured to replace similarly priced PCs from the year previous. Now, I know you’d think that a super-powered IT geek like me would be working on the latest, greatest hardware at work and at home, but, I’m sorry to tell you that it’s just not so. Everyone else gets new equipment before I do. I end up working on last year’s model, at best! And, upgrades? Forget about it! The last time I did an upgrade of any value, I might as well have just gotten a new PC anyway. Besides, now I have a LinkStation Live 500Mb Network Attached Storage device to use as a backup before upgrading, so I shouldn’t have to worry about losing data. In fact, I should be able to use this little toy to backup my servers, my workstations, my router configurations and even my one Linux laptop.

So, to recap, the only things I really upgrade on a machine are memory and diskspace. Laptops, which are adequately configured most of the time anyway, are priced well enough to be affordable and can easily take my normal, preferred upgrades. Laptops take up less space and are, obviously, more portable in case of emergency, but still can handle all my peripherals, thanks to USB. And, furthermore, I can still get laptops that have docking stations, if I want to have them hooked up to a monitor, keyboard and mouse most of the time.

Pretty much, I can’t see a reason to buy a regular PC ever again. If I need something special, like a server or a firewall, I can get a specially configured machine, or build one myself specifically for that purpose.
So, what do you all think, is the desktop dead?

Advice from your Uncle Jim:
"The real art of conversation is not only to say the right thing in the right place but to leave unsaid the wrong thing at the tempting moment."
   --Lady Dorothy Nevill

What do you run on your monitor server?

Do you think you’re too small to run a monitoring server? Well, I have two local servers, a remote web server and a remote e-mail server that I’m in charge of worrying about and I run a monitoring server. It’s not much of a server, really, just an old workstation to which I added a bunch of spare memory and a large, clean hard drive. Naturally, I run Linux on my monitoring server, which, ironically enough, I named Monitor. Specifically, Monitor runs Red Hat Fedora.

Monitor runs Nagios, which I’ve mentioned before. With Nagios, I monitor both my main file server and my accounting SQL server. I also watch the off-site web server and the SMTP and POP3 e-mail services on the managed e-mail server we have through our ISP, just to make sure they’re up and running. (It’s a long story on why we have that, but, rather than run my own, to reduce hassle, headache and potential disaster, I let someone else worry about it.) Nagios tells me the status of drive space, the memory usage, the CPU usage and uptime on both servers. On the accounting SQL server, it verifies that the SQL service is available and that users can log into it. On the file server, it tells me the status of the Backupexec modules. Unfortunately, I haven’t figured out a way to get Nagios to tell me more than the running status of Backupexec, but, in my spare time, I still try to find a way to have it report the status of the last backup or restore job run. No joy yet, but I keep trying.

I also have a browser window open to the SolarWinds installation at our ISP. They monitor inbound and outbound traffic over the Internet connection we have. Usually, I keep a window open on the standard “interface details” reports which update regularly. Most of the time, I also open a window to the weekly history report on the min/max/average packets in and out. I have to update that manually, but it lets me quickly compare today’s traffic to network traffic for the past week. It’s nice to see those trends!
Lately, I’ve been keeping a browser window open to the national weather forecast, by hour, for our local area. In hurricane country, keeping track of the weather can be vitally important! But, if you live in snow country, the same thing would probably be true, too. I don’t recall heavy snow causing an outage during my time up North, but it’s not out of the realm of possibility.

Finally, I almost always have Wireshark running a packet capture, too. If I see a sudden spike in traffic, having a packet capture already running could make a big difference. I have that capture set to save files locally, too, just in case. I’ve been setting the capture to rotate nine files and to keep the files at seven megabytes each. That should give me a pretty good spread of captured network data if I ever need to go back and diagnose a traffic problem. And, since the machine is actually kind of stinky hardware and crashes on occasion, when I restart the packet capture, I rename the base file using the current date. That way, I can tell at a glance when the capture was started.

One day, I’d like to move this all to another machine that’s more stable, faster and has more drive space, but, until then, this works. It’s only on the private network, so I can’t look at it directly from the Internet, but, it still does enough for me. One of these days, I’ll look into some of Nagios’ data presentation modules and teach this old dog a few new tricks, like automated uptime reports and that kind of thing.

Hopefully, that hasn’t bored too many of my non-geek readers. And, I hope it’s given my geek readers something to think about. So, tell me in the comments, if you have a monitoring server/station/whatever, what does it run? If you don’t have one, why not?