On the Lambda

Programming, Technology, and Systems Administration

On the Lambda

Entries Tagged as 'networking'

Cleaning an Infected Computer at Work

September 23rd, 2014 · No Comments · security, superuser

I have two basic philosophies underpinning how I approach infected computers. To begin with, I don’t really believe in cleaning an infected computer at all. I could cover the reasoning for this in more detail, but I already have a well-voted answer on SuperUser.com that I think says it better than I could fit here. For computers […]

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The N Word

May 9th, 2014 · No Comments · sql, Sql Server

No, not that N word. I’m talking about N string literal prefixes in T-SQL. Like this: SELECT * FROM Foo WHERE Bar = N’Baz’ If you don’t know what that N is for, it tells Sql Server that your string literal is an nvarchar, rather than a varchar… that is, that the string literal may […]

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Secure WiFi is Broken

November 20th, 2013 · No Comments · networking, Uncategorized, wifi

Today, I’m offering you a challenge. Go out and find a public wifi network that offers encryption without making you log in. I dare you. Unfortunately, this endeavor is doomed to failure. WiFi as it exists today makes it virtually impossible to offer such a thing. I find myself in the business of managing a […]

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What I did Last Night

January 26th, 2013 · No Comments · networking

Last night (or, rather, much too early this morning) I had the privilege to change out the old core network switch (a stacked pair of 3Com 4900SX’s) at the college where I work for a shiny new HP 5406zl. I started at about 2am, and as I sit in Starbucks typing this it’s now past 10am and […]

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AppleTV vs AirServer in the Classroom

September 24th, 2012 · 3 Comments · networking

AirPlay is fast becoming the go-to protocol for wireless display purposes. There is software to support mirroring your display to a device such as an AppleTV from iOS, OS X, PC, and even Android. In addition to the AppleTV, there are a number of other options to host a mirrored screen. This includes any device capable of running […]

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Are Client Access Licenses Enforceable?

January 5th, 2012 · No Comments · servers

One of the less-fun aspects of managing Microsoft Windows servers is dealing with the Client Access Licenses (CALs).  CALs aren’t only expensive, but with different licensing models (per seat, per user, per machine, etc) and different versions (CALs bought for Server 2003 are no good for your beefy new 2008 R2 box) they are also […]

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A Different Way to Wifi Part 1: Basic Requirements

March 30th, 2011 · No Comments · wifi

Before I really get into things I need to cover some basic requirements you will need for your network. First up is that you do need an existing, functional, wired network.  This network should already have established links to each building.  Your network should also already have adequate switching capacity (in terms of ports) for […]

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A Different Way to Wifi Part 0: Introduction

March 27th, 2011 · No Comments · wifi

Over the next several weeks I’m going to talk about Wifi, and how to do an extensive multi-building deployment on the cheap.  I’ll cover required background knowledge, basics and stages of a wifi deployment, site surveys and access point placement, security requirements, access point selection and preparation, and handling density and scale.  From there I’ll […]

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