The Wrongness: Route and Identity

2016-09-25 01:46 by Ian

Of all the species of Wrongness I commonly observe in the wild, the conflation of Route and Identity is of particular concern at layer 7 of the OSI stack.

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Intro to DTLS

2016-09-24 21:25 by Ian

This post is aimed at technical readers who know what TLS is used for, but may know nothing about its operation. It is also an attempt to explain why DTLS was developed, and how it applies to IoT.

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Open ports are not a security hole

2015-11-23 22:19 by Ian

What follows is an email I wrote for our sales department, which had to regularly field questions surrounding these issues when our VoIP product came up. The scary thing is that the misconception is most prevalent in the minds of people who should know better (engineers and sysadmins). So here is the most unpopular position you can possibly take in a group of network admins. Maybe it will help someone else dismantle some technical hear-say.

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Three-minute history of telephony

2014-11-11 12:44 by Ian

This is something I wrote for some coworkers in an effort to describe why the telephone signalling system is full of what appears to be arbitrary cruft and inconsistency. I thought it might be worth poasting.

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Installing asterisk 10 realtime

2012-09-04 11:28 by Ian

This is a brief guide to setting up asterisk on a generic linux host. This particular guide was written using CentOS 6. The process and configuration have been checked for accuracy on CentOS 6, Debian, and Gentoo. I have tried to indicate steps where such differences are relevant,

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An accessible introduction to PHP optimization

2009-09-07 22:09 by Ian

This was a ticket that I had from a customer who wanted us to increase the upper-limit on PHP script execution because his crappy script wouldn’t finish in time before our server-wide limit shut down his PHP process.

I’m posting it with the hope that it will be of help to someone new to PHP trying to write a cleaner script.

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Where I work

2009-02-24 02:19 by Ian

I’ve not seen such an impressive collection of servers before working at the datacenter. So I took some pictures.

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Fixing the WordPress HTTP-500 error

2008-03-16 22:44 by Ian

The Internet has seen a good deal of speculation as to why WordPress fails on an otherwise working PHP installation. A co-worker and I dug into it and found the problem.

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MySQL potpourri (Backup, restore, and migration)

2008-03-16 22:35 by Ian

Some general information about MySQL tools and using them to backup and restore a database.

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Installing PHPbb3 on CrystalTech servers

2008-03-16 22:30 by Ian

This is a simple overview of the installation procedures for various open-source PHP packages that our customers frequently install. This entry gives an overview of PHPbb3

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