DDOS attack on Steve Gibson

Steve Gibson, creator of SpinRite, ShieldsUP, and a number of other tools over the last 15 years, suffered a Distributed Denial of Service (DDoS) attack on his web site (http://grc.com) over the first part of this month.  The script kiddies fooled with the wrong guy.  Steve is nothing if not a very accomplished hacker, and he put his considerable skill to good use tracking down the perpetrators of this attack and figuring out how they did it.  His detailed report of the attack and its aftermath makes for very interesting reading.  It’s a very long article, but well worth the time.

The attack on the grc.com web site was performed by 474 computers that had been previously compromised and were running a “bot” that takes commands from a central server.  The person responsible for the bots just had to give the command, and the bots started flooding grc.com with millions of TCP packets.  This type of attack doesn’t attempt to compromise the victim’s computer or data–it just floods the site with so much data that legitimate requests can’t get through.  This type of attack is made possible by the structure of the Internet and the protocols used to communicate.

One of the most important statements that Steve makes (at the end of his article) is:

The days of an Internet based upon mutual trust among interconnected networks has passed.  The Internet’s fundamental infrastructure MUST BE SECURED before the Net becomes further threatened by increasing levels of malicious attacks.

I couldn’t agree more.  This is fundamentally the same issue as the spam (unsolicited commercial email) problem, and will require much the same solution.  I’m convinced that it will cost anonymity, which is no big deal to me but will likely get some people all in a lather.

The effects of exercise on appetite

In his web diary entry for May 26, my good friend Jeff Duntemann points out something that I either conveniently forgot or never really knew:  Vigorous exercise increases your appetite, whereas moderate exercise reduces your appetite.  Read Jeff’s diary entry for the details.

This explains my limited success so far in attaining my goal of losing one pound per week.  I’ve been steadily increasing my cycling speed; staying aerobic most of the time, but really pushing my body because I want to get faster.  I vary my workouts to some extent, but for the most part when I’m done with a ride my legs are rubber and I’m ready to collapse.  I’ve been working too hard, punishing my body (see my May 20 entry), and not achieving my primary goal, which is to lose some weight.  Sure, I’m somewhat faster than I was two months ago, but not appreciably healthier.  I’m working on a total rewrite of my training plan.

‘Possums and armadillos

My brother sent me a note today about my May 17 entry.

I think I’ve been in Arkansas too long. When you mentioned enjoying wildlife in the area I did a double take on the word opossum.  Then my brain said that IS the correct name.  I’ve been referring to them and hearing them referred to as ‘possums so long I’d forgotten that the name actually starts with an ‘o’.

I remember that when I typed the word “opossum,” I half expected the spell checker to complain at me.  Maybe I’ve been in Texas too long.

My brother also reminded me that an armadillo is nothing but a ‘possum on a half shell.

I used to joke that armadillos don’t really exist.  The only armadillos I’d ever seen until about 2 years ago were either stuffed, or splattered on the road.  I thought maybe they were props strategically placed on the road by the Texas Department of Public Safety for the tourists.  “See, we have armadillos in Texas.”  But then I actually saw a couple of live ones when I was on a night mountain bike ride, so I can’t believe the conspiracy theory anymore.

Adult content is big business

I’ve always known that adult content was big business on the Internet, but until today didn’t realize just how big.  Being in the “e Business” consulting business, Catapult Systems gets all kinds of periodicals–solicited or not.  I happened to run across a copy of AVN Online magazine at the office today.  The magazine is 170 pages of very slick advertisements on expensive paper, with just enough editorial content (You, Too, Can Be An Adult Webmaster) to classify it as a magazine rather than a catalog.  Most of the advertisements are for credit card processors, hosting services, and sponsors who pay a kickback ($35 or more) if a click-through results in a subscription to the sponsor’s services.  The idea:  post some naughty pictures on your site and provide a link to the sponsor’s site.  If a user who clicks on the sponsor’s link from your site ends up signing up for more porn (excuse me, “erotica”), then you collect $35.  I guess people who actually sign up spend lots of money.  With all the free por…err..erotica available out there, I’m surprised that anybody pays for it.

Wind breaks tree

We got a good taste of Central Texas weather last night.  A huge thunderstorm came out of the northwest about 9:30, carrying baseball sized hail, 60 MPH winds, heavy rain, and some reported funnel clouds (although thankfully no tornadoes touched down).  We were fortunate enough not to get any of the big hail, but we got plenty of rain and the wind did some damage.  It tore shingles from the house, the garage, and the pool house, scattered debris all over the yard, and tore a foot-thick limb from one of our oak trees.  That broken branch made up about a third of the tree’s upper canopy.  The image above shows the tree from the front, where you can see the hole that’s left in the tree’s canopy.  The image below is from the back, where you get a better idea of the size of the limb.

All told, we were fortunate.  At least a half dozen large trees in the neighborhood simply fell over in the wind.  That’s not surprising, as the bedrock in some places is just a few feet under the soil.  Most trees can’t sink a tap root in this ground.  Instead, many small shallow roots spread out over a large area.  It’s stable enough in normal conditions, but sustained 60 MPH winds with higher gusts will rip a tree right out of the ground.  One of our neighbors had to start the chainsaw at 6:30 this morning to clear a path out of his driveway.  I, too, got to start the chainsaw (as I’m fond of saying, “any day you get to start the chainsaw is a good day”).  The larger pieces are now a pile of firewood, and the smaller limbs are ready for the mulcher.

Bicycle update

I’ve been biking a lot the last couple of months, trying to commute to work twice a week and do a long ride on the weekends.  I think I did too much too soon.  I cut back this week because my legs were perpetually sore, the tendonitis in my left leg was acting up, and I was always tired.  I didn’t ride last weekend, and this week I only did the commute to work once.  Letting up paid off.  This morning I rode 53 miles, and my legs felt fine.  The tendonitis only acted up once–when I was pushing it up a long steep hill.  Working on the new garden bed after doing 50 miles was hard (and hot–it got over 90 today), but I’m happy that I figured out why I wasn’t feeling well.  I guess I’ll just have to take this training a little slower so I don’t destroy my body.

More landscaping work

As part of our landscaping plan, we’re creating beds in the front of the house to get the grass away from the building.  This weekend’s project is to prepare the grassy area between the house and the sidewalk.  I actually took this picture a couple of months ago after I’d torn out the overgrown bushes next to the house.  I then used a tiller to plow the grass under, but got stopped in my tracks by over a month of heavy rains.  Tilling, of course, didn’t kill the grass.  On the contrary, it loosened the soil so that grass and weeds could grow much better.  Today I got the tiller out and plowed the (much thicker and greener) grass under again, and then added three yards of compost to the soil.  Tomorrow I’ll till the compost into the soil and level the ground (sloping it away from the house), and start laying mulch to prevent grass and weeds from coming back.  We probably won’t plant anything until the fall, as it’s coming on to the hot and dry season here when the plants that were so green in the spring shrivel up and die for lack of water.  Running a tiller is work, especially when I have to stop every minute or so to remove a rock.  Between today and the first time I tilled this area, I’ve pulled three trailer loads of rocks from that area.  When I go to plant trees, I’m hiring a backhoe.

Book review: Forces of Habit

Book of the week (last 2 weeks, I guess–I’ve had little time for serious reading) is Forces of Habit, Drugs and the Making of the Modern World by David T. Courtwright.  In it, the author gives a short history of psychoactive substances in society, and offers explanations of why some (alcohol, tobacco, caffeine) became largely accepted and others (marijuana, cocaine, and opiates) have become controlled substances.  This book is especially interesting in light of what I learned from reading Guns, Germs, and Steel (see my March 29 entry).

I found the chapters on governments’ drug addictions especially enlightening.  Governments have a very difficult time with drugs.  People like psychoactive substances (our national addictions to caffeine and sugar, for example, or nicotine and alcohol), and get very upset when their access to these drugs is restricted.  Governments also obtain considerable income from licit drug trade.  Balancing the social damage (health costs and lost productivity) due to drugs with citizens’ happiness and government revenue obtained from licit drug trade is a very tricky thing; witness our own experiment with Prohibition in the 1920s, Russia’s attempt to curtail the vodka industry in the 1980s, and China’s attempt to stop the opium trade in the 1920s.

My only complaint with the book (and it’s relatively minor) is that the author is pretty heavy handed in criticizing the tobacco industry.  I’ll grant that the tobacco industry is hardly blameless (there are plenty of well-supported anecdotes in the book), but their tactics are no less deplorable than those of alcohol, cocaine, or opium industries both past and present.  I would have preferred a more even handed approach–more exposure of all the industries.

Newborn fawn

It’s fawning season (or is that calving season?) for the neighborhood deer.  Last week my neighbor came home to find a doe with a new fawn in his yard.  He got some video footage of the fawn’s first steps.  A couple of days later I scared a very young fawn with the lawn mower.  This morning on the way to work, I saw a doe and new fawn in my other neighbor’s yard, and let Debra know.  She went over with the camera and got the picture to the left.  Debra actually found two fawns.  One was either stillborn or died shortly after birth (the one in the picture is the live one).  Twins?  Probably, as multiple births aren’t uncommon with our neighborhood deer.

The deer are a mixed blessing.  I like having wildlife in the neighborhood (we also have opossums, raccoons, armadillo, snakes, lizards, tarantulas, and roadrunners), but the deer eat most ornamental plants, and almost all of the food plants.  Some of our neighbors set out deer corn for them, which I find obnoxious.  Fortunately, nobody does that for long–feeding a herd of 25 deer can get rather expensive.

Hybrid cars

Hybrid cars aren’t really new, but they’ve just recently become available to the general public.  Honda and Toyota have production models that you can order, and Chrysler and Ford have concept cars that are in various stages of pre-production.

The idea behind a hybrid car is very simple.  A gasoline powered engine charges batteries that in turn are used to power the electric motor that actually propels the car.  You can find a more detailed explanation here.  (The HowStuffWorks site, by the way, is a fantastic place.  If you ever wonder how anything works, look there first.)  Hybrid cars use a number of techniques to operate more efficiently than traditional cars:  lighter materials, more aerodynamic shapes, kinetic energy recovery (energy recovered from braking goes back into the batteries), and turning off the engine when it’s not needed.  The cars are viable transportation, and prices, though still higher than for traditional cars, are within striking distance.  The Honda and Toyota models, for example, both list for about $20,000.  They still burn fossil fuels, so they’re less than ideal, but they’re a step in the right direction.  It’ll be a few years before I need to buy another car.  You can bet I’ll keep my eye on developments in this area.