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Hi. I'm a Unix Administrator, mathematics enthusiast, and amateur philosopher. This is where I rant about that which upsets me, laugh about that which amuses me, and jabber about that which holds my interest most: Unix.
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In preparation for an anniversary

Posted 10-16-2012 at 05:20 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)

It's been nearly a year since I started working at Rackspace, so I've been thinking alot over the past few days about how my life has changed since I started this insane wild ride. Aside from the expected "I live in San Antonio now", or "I make better money now", or even "I can't begin to explain how much I've learned in the past year", there are deeper, more subtle changes that have had oddly profound effects on my day to day life.

For starters, its...
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Old

Automated OpenBSD-STABLE build

Posted 10-08-2012 at 04:54 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)
Updated 10-08-2012 at 05:14 PM by rocket357 (refactoring?)

It's ugly. But it works.

Code:
#!/bin/sh

set -e

export LOGFILE=/var/log/build_stable.log
export ARCH=`machine`

# DEFAULT: BUILD -STABLE (UPGRADE TO LATEST -RELEASE FIRST!!)
export BUILDVER=OPENBSD_`uname -r | tr '.' '_'`

cat > ${LOGFILE} << EOF


STABLE BUILD - `date` - `uname -a`


EOF

echo "Updating Sources for ${BUILDVER}"
...
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Old

I am a networking idiot

Posted 10-01-2012 at 10:36 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)
Updated 10-02-2012 at 09:22 AM by rocket357

So a while back I got my hands on a Cisco 2948 for my home network. Sure, it's only 10/100. Sure, it's an older model. Sure, it's EOL.

But damn it's sexy in my livingroom...48 ports of Cisco goodness. Port security! VLANS! So much more than my other "dumb" switches! Imagine the possibilities! I set off flipping knobs and tweaking everything as tight as I can. Months of restful sleep ensue, with my world protected by pf and a locked down switch.

Then...
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Old

Auto-block ssh brute force attacks using built-in tools (OpenBSD and Linux)

Posted 08-30-2012 at 01:28 AM by rocket357 (Musings on technology, philosophy, and life in the corporate world)

I've run a cool trick for a while on my OpenBSD firewall at home, where traffic from any given ip address and port 22 on the firewall is rate limited. If an ip exceeds the given rate, it is put into a ban list (table, actually) that the firewall is configured to drop all traffic from. It works well, and the same functionality can be setup in Linux, too.

To set it up on OpenBSD (this is lifted verbatim from the OpenBSD website pf manual, hence port www instead of port ssh):
...
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Old

Boredom gets the best of me...twice.

Posted 08-22-2012 at 04:58 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)

Woke up this morning feeling a bit groggy. I'd stayed up entirely too late last night debating different human interactions with my wife and a friend of ours. People are not like computers. They are not predictable...at least, that's my story and I'm sticking to it.

I stumbled through my morning routine, wandered out to the kitchen to grab my lunch, threw the work laptop under my arm and walked out to the car. Bird poo on the driver's side window...again. Not just any bird poo,...
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