apache Archives - The Silicon Underground

Finding and blocking an abusive host from your Apache log

Dave Farquhar — Thu, 17 Aug 2017 13:07:41 +0000

My web site slowed to a crawl last night, my CPU usage soared to 100%, and my built-in security measures weren’t helping. I ended up having to do some old-school Linux sysadmin work to stop them. I haven’t been an

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What is vltov1?

Dave Farquhar — Tue, 12 Jul 2016 11:00:59 +0000

On the afternoon of July 5, 2016, a mysterious directory called vltov1 appeared in the filesystem of my web server. A few files on my site changed, and soon my blog crashed, due to changes I’d made in the database

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I got hacked. I did it to teach you a lesson, and I’m sure you believe it.

Dave Farquhar — Mon, 09 Nov 2015 11:00:23 +0000

The other day, this showed up in my e-mail: A file change was detected on your system for site URL https://dfarq.homeip.net. Scan was generated on Tuesday, November 3rd, 2015 at 5:25 am A summary of the scan results is shown

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Port 2381: What it is and how to manage it

Dave Farquhar — Wed, 28 Jan 2015 11:00:38 +0000

I was doing some scanning with a new vulnerability scanner at work. It found something listening on a lot of servers, described only as Apache and OpenSSL listening on TCP port 2381. The versions varied. Luckily I also had Qualys

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Stand up for net neutrality

Dave Farquhar — Thu, 15 May 2014 11:00:49 +0000

Neocities has decided to do something about Net Neutrality–shunt the FCC into the slow lane, and post the code for doing it so the rest of us who run web sites can do it too. The original was written for

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Some security short-takes I never got around to posting

Dave Farquhar — Wed, 26 Feb 2014 11:00:08 +0000

Here’s some stuff I’ve found in recent weeks that I never got around to posting, so I’ll just round it all up briefly. Let’s lead off with an interesting walkthrough of reverse-engineering: http://www.devttys0.com/2014/02/reversing-the-wrt120n-firmware-obfuscation/ There’s little I can add to this,

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How long does a hard drive last?

Dave Farquhar — Thu, 21 Nov 2013 11:00:25 +0000

If you’re asking how long does a hard drive last, I found this study on hard drive longevity last week. I take issue with the opening paragraph but the rest of the article is very good. The opening paragraph is

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Libre Office and Open Office both grow up a bit–together

Dave Farquhar — Fri, 26 Jul 2013 11:00:20 +0000

Both Libre Office and Open Office released new versions this week, and the changelog indicates a good amount of shared code between the two, at least in this go-round. The animosity between the two—Libre Office is a fork of Open

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Computer burn in explained

Dave Farquhar — Sat, 13 Jul 2013 11:00:12 +0000

I’ve worked several different shops now that seem to have a misconception about computer burn in. So I’m going to explain it. I think there’s a misconception that if you let a computer run with a light load for a

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Linux admins beware, there’s a web server exploit in the wild

Dave Farquhar — Tue, 07 May 2013 23:09:35 +0000

No OS is 100% secure if there’s enough desire to get in. There’s a web server exploit targeting Apache, Nginx, and Lighttpd running on Linux–a first of its kind, in at least one regard. According to this page, if you

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