zog blog mk II

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October 1, 2014

wordpress comment spam has become insane.. fail2ban to the rescue

by @ 11:58 am. Filed under computerstuff

This informative blog post shows how to configure the fail2ban software to prevent the idiotic comment spam from causing high load on the server. Of course the excellent Kismet plugin stops the vast majority of it from appearing, but even the constant POST attempts to pump spam into the server was causing high load.
One minor tweak is in the case of this blog I had to change:
failregex = ^ -.*POST /wordpress/wp-comments-post.php
failregex = ^ -.*POST /wp-comments-post.php
to match the URL location on this site, but otherwise now its blocking repeat comment posters, and the MySQL load is dropping.

August 10, 2014

Interesting new approach to dynamic DNS services: knockdns.com

by @ 2:05 pm. Filed under computerstuff

Here’s an interesting new approach to Dynamic DNS services (such as DYNDNS.ORG, NO-IP.COM) - knockdns.com.. It uses the internet security technique known as portknocking as both the authentication technique and mode of getting the host IP. Presently only supports A records.

August 18, 2013

New Electric Bike: Kona Blast stealth conversion with Bafang motor

by @ 6:34 pm. Filed under electric bikes, kona-blast-stealth

I just purchased a new second hand electric bike from ebay - an already converted Kona Blast with a very good quality DIY conversion done:


March 30, 2013

Institute for Cultural Diplomacy

by @ 9:50 pm. Filed under general

Institute for Cultural Diplomacy and wikipedia - interesting article on blatant self promotion and wikipedia, and threats of legal action.

As referenced by good ol’ boingboing

March 16, 2013

Slamming the door on Jehovah

by @ 10:43 am. Filed under religion

Slamming the door on Jehovah


Jehovah’s Witnesses ‘a cruel cult’

February 12, 2013

Saudi preacher who ‘raped and tortured’ his five -year-old daughter to death is released after paying ‘blood money’

by @ 8:21 pm. Filed under religion

Saudi preacher who ‘raped and tortured’ his five -year-old daughter to death is released after paying ‘blood money’

January 6, 2013

lead poisoning link to violent crime

by @ 10:45 am. Filed under general

This is an intriguing theory:

A very interesting theory:


via boingboing:


some skeptical views:



December 16, 2012

ambient music release - ZOGAM - Melbourne Suburban Winter 2012

by @ 5:13 pm. Filed under bleeps

possibly more a polished demo than a fully realised release, but I thought it worthwhile making these experiments with guitar and timestretch software available on bandcamp.com:

ZOGAM - Melbourne Suburban Winter 2012

ZOGAM covert art

August 9, 2011

replacement battery back for greenewheels bike found

by @ 10:05 pm. Filed under electric bikes, greenewheels

I just quickly dropped in the 36V 9AH LiFePO4 battery pack I got from Value E Bikes and was pleasantly suprised it was a close, though not perfect fit.

value E bikes batter on greenEwheels bike

It did fit well enough that I felt confident going for a short test ride, and all was good.
For a longer ride I’ll fir it more snugly with some rubber matting and ratchet straps, but the fit is quite close. The “rail” the battery has to slide into place is quite differently sized from the greenewheels rail however.

vale E bikes battery pack on greenEwheels bike

Next step, range tests, after a visit to the $2 shop for mounting hardware.

I did have to remove one of the cable holders as the battery is taller, so that the DC out lead would fit.

update 1 week later
We’ll I’ve clocked up 80k in a few rides to work and the battery is working great so far. I would have ridden more except its been rainy. Havn’t done a full range test but no apparent loss of power after 22km, so looking good.

August 3, 2011

opening up the greenewheels 36V 10AH battery pack

by @ 8:47 am. Filed under electric bikes, greenewheels

Some quick notes:
Battery contains 10 cells strapped together with blue heatsrhink plastic stuff.
Cells measure 4.2V (no load) so I’m guessing 3.7 V when loaded.
Sticker on it contains phone number from which I am able to determine the battery was sourced from here.

Info is:
Model: JX-6 JX-6
Brand: Xin power
Operating current is 6A; maximum discharge current of 15A; size of 32 × 55 × 70mm (length × width × height); weighs approximately 310 grams. May form a 7.2V/10Ah (2 series), 10.8V/10Ah (3 series), 14.4V/10Ah (4 string), 24V/10Ah (7 string), 36V/10Ah (10 strings) and other forms of power.

The dimensions mentioned also match the right dimensions from measuring one of the cells after peeling back the plastic wrapper. Still havent been able to get the whole pack of cells out as they seem to be glued in hard!

Googling around I see these cells available, which might be a very close match? the ones listed as LT-325570

Peeling back the plastic wrapping on one of the cells it just has a barcode and the numbers “070806B 325670 0115″.

Another option is to get a 36V 10AH pack from Ping. The one listed is too square, but this blog post indicates these packs work perfectly with the greenewheelsbike, and the comment indicates Ping will pack the batteries in a longer narrrower packing if requested:

I did write to Ping to see if he could make me one that would fit in the battery space better, to accomodate my narrower shimano bottom bracket. He was most helpful, and wrote back with this:

[Yes, we can make it in different size. We can make the 36v10ah pack in size of 300×105x80mm. Is it suitable?

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jour·nal n. A personal record of occurrences, experiences, and reflections kept on a regular basis; a diary.

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