John Kawakami's blog

Cloud Computing Costs

I was checking out cloud services a year ago, and pricing them out. The general rule of thumb seemed to be that the up-front costs were lower, but the cost over time was higher. The ongoing costs generally work out to around $60 to $500 per application per user per year.

A typical situation is buying 25 Exchange mailboxes for $5 per month. That's $1,800 per year. That's cheaper than buying a server and Exchange, but not necessarily if you factor in other services running on your hardware.

Photo Wall that Scrolls Forever Loading New Photos at Bottom

I was reading the code at and learned how to do this "scrolling forever wall" effect. It's clever.

Deliverability Blues 2013

We recently had a rash of spam sending due to someone finding, guessing, or leaking a user's password. Sometimes, it just requires that, not some security breach. Well, we didn't catch it and stop it in time, and now we're suffering some deliverability problems ranging from slowdowns to outright blocking by some servers.

Sign in sheet website

I spent way too much time tonight putting together a sign-in sheet website, called, generically enough Sign-in Sheet.

Computer Professional Overtime Exemption

Under US labor rules, some computer programmers are exempt from overtime laws. There is considerable misunderstanding about this law. I'm not an expert, or even novice, about this law, but am compiling this page as a resource for study and to increase understanding. Corrections to johnk-at-riceball-dot-com are appreciated. If you would like to network and get on a mailing list about this issue, please write to that address as well.

LastPass Rocks

I just lost my bag, and in that bag was a sheet with all my slightly obfuscated passwords and usernames and website urls. My trick was to make the information incomplete, so that it's hard to use.

RIP Slaptech Framework

Slaptech framework was a PHP 4 based framework that never got released into the public, that we built to do projects.

Almost Done with Refinishing (part of) my Mother's Kitchen

I'm almost done refinishing my mother's kitchen. This blog details some of the work, some problems, and some of the solutions.


Control Ingress (incoming) bandwidth... with Bittorrent and others

I wanted to download a file, but we just got this awesome high speed fiber optic internet...

Got Semi-Scammed by Discount SSL Vendor Comodo with "PositiveSSL CA 2"

(Just to be fair, I think the SSL cert business is a scam, so there.)

More Impressions of the ZyXEL ZyWALL USG-50

I've finally started to work on the network because, while things are heating up at work, I'm mostly on-call for the next week. I have some time on my hands to experiment.

FEC on WiFi... sure... but on disks?

[Security Now has commented on the original article (which I found through Hacker News). It's coming at it as a debunker. I guess that's okay - because FEC *doesn't* increase bandwidth - it just reduces retransmissions, helping to prevent waste. It's also not a huge breakthrough when the basic technology was used in CDs back in the 70s and 80s... and it was pioneered in 1960. [...though you could say the same for the PC or iPad.]]

Headaches from Configuring Authentication and Encryption for Unix MTAs

Though I'm now officially an Exchange hater, there's still one thing that really sucks about running a Unixy email server: authentication and encryption.

It's been hard to configure for years - Sendmail, qmail, and now exim4, have put me through the grinder when it comes to setting up authentication, particularly authentication for SMTP relaying.

Out of box, the mail servers in the Debian and Ubuntu distros seem to be configured to relay email for your localhost, and that's all.

Inside a Gimmick Antenna

I fell for marketing and advertising, again. I bought one of those stupid antennas with the little dial knob on it. What's really stupid is that I already had one similar to it, and it sucked.

Syndicate content