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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.
Old

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

Posted 08-30-2012 at 02:28 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 05:58 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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Old

Ante up

Posted 07-04-2012 at 04:47 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)
Updated 07-04-2012 at 05:05 PM by rocket357

I used to work for a software/hosting company that half-a$$ed every expenditure they could. They put in a residential cooling unit in one of their datacenters because it was considerably cheaper than the industrial units, they ran all traffic over a single, flat network rather than spend the cash to build proper service/backup networks, they purchased Dell switches instead of Cisco switches, no bonding/teaming on production connections, etc...

During that time, I designed what I...
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Old

Hello again, LQ!

Posted 03-07-2012 at 06:18 PM by rocket357 (Musings on technology, philosophy, and life in the corporate world)

Hi.

I've been busy. Very busy.

I managed to find time to boot up my Ultra5 the other day. It complained that the clock was wrong...apparently someone turned the clock forward 118 days. Sigh...in all truth, the sparc was in storage for 115+ days, and since I finally got settled into an apartment in San Antonio, I've had time to set things back up. The Ultra5 now has a friend...an Ultra2 that was given to me by a coworker at Rackspace. He never used it much, and...
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Old

RHCE - a bit late, but almost done!

Posted 02-08-2012 at 10:46 AM by rocket357 (Musings on technology, philosophy, and life in the corporate world)

A little while ago (2007?) I joined LQ.org. In one of my first posts I asked a question about the RedHat Certification courses and studying for them. I wanted to get my RHCE, but didn't have the knowledge needed to get it...so I wanted to know if studying CentOS was a good start.

Fast forward 5 years. I'm sitting in a week-long RHCE "boot camp" class. We're supposed to be doing a lab for PAM configuration for the next few minutes, but I'm already done...so I'm blogging...
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