Category Archives: Work

World IPv6 Day

In “Celebration” of World IPv6 Day, David suggested that we try a “Crazy Ping”, showing how easy it is to get IPv6 running, even on the most oddball networks.  For the heck of it, I configured up this evening the following

A Netbook with an Icom ID-1 D-Star radio plugged into its ethernet port.

A Laptop with both an Icom ID-1 D-Star radio plugged into its ethernet port, and a Kenwood TH-D72 configured in Kiss Mode (9600baud AX.25) plugged into a USB port. The laptop was then configured with an IPv6 over IPv4 tunnel to…

A Desktop, with a Kenwood TM-D710 configured in Kiss mode plugged into an RS-232 port.  The desktop also is my sixxs tunnel endpoint.

It isn’t often that you can ‘hear’ someone connect to your computer, but with every packet, the squelch on the TH-D72 opened. So I could hear every packet going to the notebook.

The “Testbed”:

The result:

j0n@scott:~$ ping6 -c 1 2001:770:132:deaf::2
PING 2001:770:132:deaf::2(2001:770:132:deaf::2) 56 data bytes
64 bytes from 2001:770:132:deaf::2: icmp_seq=1 ttl=60 time=3073 ms

--- 2001:770:132:deaf::2 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 3073.686/3073.686/3073.686/0.000 ms

Now why would anyone want to run IPv6 over IPv4 over AX.25? well that is a different question altogether, all I can say is that it works, but not very efficiently.

“Gorilla” Update

I’ve not been in the shack all that much recently (being part of the organising team the the Irish IPv6 Summit kept me busy) so I have not been doing much checking up on the PV installation and how it is working.  Today, after assisting the South Eastern Amateur Radio Group set up a station for the EI2GEO special event station, I got to sit down and do some investigations. I have a second 60 Watt solar panel that I mentioned before. We hooked it into the battery system on Jim, EI8IG’s camper van to keep the battery topped up via solar power, and ran the radio from the same battery bank.  This evening I dropped out my little 850 watt generator to keep the battery topped up overnight (and to give it a good run).

Today over a 12 hour period between approximately 08:00-20:00, my rrdtool graph says the system produced an average of 148 watts. 148 x 12 gives 1776kw, or approximately 28.5 cents of electricty (including vat). If we have about 7000 more days of sunshine like today  (unlikely) then the system will have “paid for itself”.  While it doesn’t seem like a whole lot, it is currently averaging about 1/6 of the ESB bill (over 30 days).

That is the first part done. Next I intend to replace my power hungry dell dimension desktop (approx. 125 watts, 24/7 or approx. 48 cents per day ) with a more efficient machine (approx 20 watts or approx. 8 cents per day). To do this I have purchased an Intel Pine Trail base D510MO a 40GB SSD drive, 4GB of ram and a DC powered case (I already have a DC supply in the shack, plus I can experiment with it in the car as well).

Thus far the machine seems to be able to do most of the tasks I need it to do, time will tell though as I need to get 6 RS-232 ports operational on it to control all the items I have running.

As an aside, we recently replaced the old washing machine (at least 10 years) with a super duper A rated new one.  Initial testing seems to suggest that it is no more efficient than the old one. My suspicion is that I tested the old one (which I no longer have) in late Autumn, where it would have the benefit of taking hot water from the cylinder (Central Heating). The new one doesn’t have a Hot water input, so has to heat the water itself.

Irish IPv6 Summit

Its taking up quite a bit of my time at the moment, and rapidly approaching (19th May).  Registration opened today (finally!), and the (draft) agenda is:

08:30 Registration and Coffee/Tea
09:00 Ministerial Launch

  • Minister of State, Science Technology and Innovation, Conor Lenihan

09:30 Welcome Address

  • Mícheál Ó Foghlú , (Chair, Irish IPv6 TF)


10:00 KEYNOTE New Zealand and Ireland: IPv6 Deployment Challenges for Islands

  • Brian Carpenter, Professor (University of Auckland)

10:30 Irish IPv6 Policy

  • Roger O’Connor , Director of Business & Technology (DCENR)

11:00 Coffee/Tea Break and Networking


11:30 Dutch Experience with Fixed IPv6 Broadband

  • Marco Hogewoning (XS4ALL)

12:00 Campus Deployment of IPv6

  • Tim Chown (University of Southampton)

12:30 Irish Experience of Wireless IPv6 Broadband

  • Martin List-Petersen CTO (AirWire)

13:00 LUNCH and Networking

14:00 KEYNOTE: RIPE NCC and IPv6

  • Daniel Karrenberg, Chief Scientist (RIPE- NCC)

14:30 Irish IPv6 Deployment for Hosting Providers

  • Michele Neylon Managing Director (Blacknight Internet Solutions)

15:00 The Story so Far: IPv4 Depletion

  • Geoff Huston Chief Scientist (APNIC) (via Video)

15:20 Coffee/Tea Break and Networking

16:00 IPv6 Enterprise Strategy

  • Yanick Pouffary , HP Distinguished Technologist in IPv6

16:30 Panel Session: IPv6 Deployment Challenges

  • Yves Paindaveine (EU Commission)
  • Mat Ford (ISOC)
  • Tim Chown (University of Southampton)
  • Dennis Jennings Board Member (ICANN)
  • Dave Northey (Microsoft)

17.30 Finish

Looking forward to seeing you there!

Has computer Security improved in 15 years?

Not much apparently:

Matt Blaze

Don’t get me wrong; cryptography was, and is, important. But in 1995, broken or weak cipher algorithms and implementations were the least of our problems. Has anything improved since then?

Hmm. We’ve made some progress on #4 and #10, but basically, not much has changed in 15 years.

Read the full text here. Worth reading for anyone with any interest in computer security.

Speeding fines

I travel one of three different routes into work every day. i tend to follow one most of the time that brings me onto the Waterford City outer ring road. Now, given that I’m not exactly the slowest driver on the road, and have been known to do the odd doughnut myself, I’m astonished at the speed many many cars overtake me at.  If there was ever a speed trap, they’d be done for (and I would probably get a telling off).

Imagine my surprise over the last few days, with the icy threat of mashing their car off a roundabout or off someone elses vehicle, that I’ve been overtaken by precisely 1 driver in the last 3 or 4 days of driving into work.

So my disturbing conclusion is that the speeding fine and penalty points are of little interest to habitual speeders, and that the fine should be increased substantially (think of the price of replacing a panel or wheel or maybe a front bumper).

Now, what can we do with the folks that just drive too slow and hog the white line?

Sean Kelly Tour – a different view

And this is it…


What has this got to do with the Sean Kelly Tour? well, the Sean Kelly Tour took place last Sunday (August 30th), and from all accounts it was quite successful with roughly 2700 hardy cyclists taking to the roads.

The above screenshot (covering an area of roughly 900 square kilometers) is taken from the xastir window of my home Ubuntu desktop after I got home from the event. It shows the trails left from the APRS equipment in several vehicles (including some of these, these, one of these and one of these), several objects and a few home stations. As the screenshot is from the end of the day, it is quite confused looking.

AREN was at the event to assist Civil Defence in maintaining an accurate location of as many of the three different sub-events (50k, 100k and 160k) as we could, allowing them to more cleverly deploy their own medical resources around the course. Great use was made of the SEARG APRS digi-peater network, and it definitely (as can be almost seen) proved it’s usefulness on the day, allowing the guys in Net Control Tim, EI2KA and Bernard, EI8FDB (see below) to keep both the the Civil Defence and event organisers updated as to the locations of various items almost in real time, throughout the day.


It was a good days exercise for AREN, and best of all I wasn’t manning Net Control!

OSX go-slow.

I’m still running 10.4 on my MacBook Pro. This morning when I came into work there was a security update for Safari available which I duly installed. At this point it all went horribly wrong. Securityd swallowed 1.7GB of Ram (out of 2GB) and it caused my machine to page-in and out continuously.

A quick bit of googling, and I came across this post. Suffice it to say, it worked a charm.

The summary (I wasn’t brave enough to just rm the file)

sudo mv /var/db/CodeEquivalenceDatabase /var/db/

and then reboot the machine.

Many thanks to the poster, you have, most definitely, saved my day!