Differences between TCP and UDP

TCP and UDP are two very different protocols.  I’ve spent a fair amount of time over the years explaining these two issues to our power engineers and technicians.  What better topic to post here. TCP is more reliable but has more overhead. Probably the most important thing to realize is only TCP has a true … [Read more…]

Random DNS lookups by Chrome

After a couple hours of boredom waiting for a conference to start, I decided to fire up Wireshark and see what I could see across the wireless.  I was greeted with the first few packets appearing to be my machine reaching out to random domains on the internet (see below). Something was attempting to lookup random … [Read more…]

Sendmail took down my site!

After a week of being very busy with other things, I wanted to take a few minutes and check on my blog only to be greeted by “Site cannot be reached.” SSH’ing into the site resulted in a similar response. So what happened? A week prior, I decided that I needed to migrate Sendmail over … [Read more…]

Oh you sneaky bastards!

Equifax lost over 140 million customer’s personal information during a recent breach.  44% of Americans just lost control over their social security, drivers license, and credit card numbers along with their names, birth date, addresses…basically everything required to start building false identities and robbing them blind. The company’s initial response is to give us all free … [Read more…]