Archive for the ‘Technology’ Category

I miss being bored

Sunday, January 10th, 2010

I’m a victim of CPA. I’m on Twitter. I’m Facebook. I’m still on IRC. I think that clicking “read all” in Google Reader is somehow cheating, so I’m left constantly playing Whack-a-mole on that and my iTunes podcast collection.

Anyway, the other thing I miss is genuine boredom. I can’t think when I last really said “I’m bored” and meant it, like you did when growing up. Leaving aside twee comments from teachers like “Bored people are boring”, the thing that I wonder is “Do you need to be bored sometimes”?

I don’t think this for any great spiritual reasons, I’m not going to suggest that we all go off on Vision Quests to find our Spirit Guides. I just think that sometimes, for some people, boredom is a driver to change things. In the words of some great children’s telly of the UK of the eighties: “Why don’t you turn the TV off and do something less boring instead.”

The never ending stream of messages, podcasts, feed items and conversations to tune into mean then you’re never bored. You’re sat there, sipping away at the information passing by, sating your CPA appetite but remaining ultimately unsatisfied. Sure you have close run-ins with boredom, but thanks to the omni-present inbox you can dodge it for another 30 minutes staring at Keyboard Cat on YouTube or debating constructively with like-minded individuals.

I’ll admit counter-point is that you can see lots of cool things online that you “might” want to do, but then you see so many cool things that you might want to do that choosing to actually do one of them becomes another exercise in itself (though you can always ask Twitter followers what to do)…

I think this year I need to try and unwire a little bit, feel a little more bored sometimes.

Saving power with Wake On Lan

Monday, August 10th, 2009

As I was saying to my friend Nick Taylor who’s clued up about identity management, I want my ID card integrated with the IT Wake-on-Lan systems.

When I walk in through the turnstiles, my card fires a message to the IT Asset management system, and if I’ve designated a computer, my machine is woken up, and by the time I arrive it’s ready to log on.

Saves me all of 45 seconds, but could well get at least some of the people who insist on turning their machines off overnight because “they don’t have time to waste”.

Ultimately though, this doesn’t have that much long term use given that everyone is moving towards laptops and wireless.

Suddenly Home Networking Matters

Monday, April 27th, 2009

Historically networking it was easy, you plugging in your 11mbps router and all was good. The 0.5mbps pipe from you to your provider was always so small that it didn’t really matter. You accepted patchy coverage as it was all quite new, and you had enough cable in place you could just deploy a second base station upstairs to fix that.

Now though, you can’t really ignore the performance of your internal network. If you’re using WDS to extend your network, have a slow WiFi bridge, or even just an inconveniently placed wall – it turns out it’s quite easy to reduce your throughput to the point that new services like BBC iPlayer in HD won’t work. With readily available broadband up to 16/24/50 megabits a second, your internal network matters.

I’m going through the pain of trying to get the WiFi network that both covers the house, covers the garden and works in my current room, which is helpfully the only place in the house without decent coverage of the existing network and precisely where the repeater to be for the garden coverage.

Do I bridge with Powerline networking? Do i just route a bit of Cat5 cable, because despite being ugly and low tech, it generally works?

While I know there are solutions to this, it does make me wonder that when someone who (mostly) knows the difference between 802.11a/b/g/n, has spare routers he can redeploy, and who despite the vagaries of compatibility that still seem to exist with WPA, (almost) has the patience to get this to work – what hope do the ordinary folk, and the Multi-service operators of the world of solving this.

Slingbox recommend using Powerline adaptors, and I’m beginning to see why.

On Wikipedia filtering

Friday, December 12th, 2008

A few thoughts on the now defunct UK Wikipedia censorship row:

  1. It’s good that it’s brought the IWFs presence into the open. It wasn’t really hidden, but many people didn’t really know it existed. Though in reality 95% of the people still don’t know or care.
  2. How come not all ISPs implementing the IWF list were affected? Was there some examination of the list (which from heresay I thought was verboten), or do the other ISPs just have a more rigid deployment/change control procedures for updates?
  3. Kudos to Thus/Demon for providing a descriptive error message (to paraphrase “the IWF told us to block this”), instead of a blank 404 which some other providers presented.
  4. Because of the implementation of the filtering, some ISPs presented all requests to Wikipedia from their outbound proxy IPs. Wikipedians then removed of anonymous editing from these IPs due to the possibility of abuse.

Ultimately, removal of anonymous editing of Wikipedia is not a huge deal. Most users can register, although there are reasons why some people may require/desire to make anonymous edits.

Regardless of the degree of the impact however, it’s now clear that some implementations of filtering can impact the normal operation of some bits of the internet. Deep Packet Inspection could possibly preserve the outbound IP, but at a far higher cost and latency impact than the “selective” transproxying that many ISPs have implemented.

Something for the Australian government/populous to consider.

On Internet Filtering in Australia

Saturday, November 1st, 2008

I read with dismay this week about the plan to offer all Australian internet users a content filter provided by their ISP. While originally there was to be an opt-out for this, it appears this is actually a switch from a supposed “clean feed” to a core list of illegal material. If the plans go ahead as mooted, Australians will not be able to avoid some form of government mandated internet filtering. (I’m sure there’s a pun here on Great Barrier Reef, Great Barrier of Grief is the best I can think of, please post a comment if you think of a better one).

The incorrect facts and rhetoric I’ve heard peddled got me riled, the Minister responsible says those who don’t want filtering (paraphrased) “want to let people access child porn”. He states that many countries, including the UK, already have such a system in place. During the interviews he doesn’t like the most obvious comparison of China who have the most notorious system, the “great firewall of China”. In the UK, according to the IWF/Hansard 95% of broadband connections block the sites listed by the IWF, which only concerns images of child abuse.

The idea of the system is pointless for so many reasons, but the following stick out for me:

  • False negatives will mean that the “clean feed” never will be entirely safe. It also can’t protect from many threats, including children being grooming on chatrooms, and the sharing of inappropriate personal information.
  • False positives will potentially mean that people can’t access legitimate information, or information hosted on the same server as “objectionable” content.
  • Ineffective as much of the harmful material that they want to limit access lives on darknets, peer-to-peer services, or is encrypted – so an upstream filtering proxy won’t prevent anyone determined from accessing it.
  • Easily bypassed as the China experience has shown. Anyone who wants to get past the proxy is able to (using VPN, TOR, etc). Given how much more savvy younger users tend to be than their parents, who are the ones likely to understand these workarounds?
  • Expensive for ISPs to implement another level of trans-proxying and traffic management. Will this be a new barrier of entry to the market?
  • Government logging is made an awful lot easier with servers running government approved software embedded in ISPs, with integration with the ISP’s authentication systems – the government could potentially have a complete history of what connections have browsed to, tagged with account details.
  • Performance reducing the already sluggish internet hanging on the end of a relatively thin bit of electric string, do users really want more latency added to their browsing?

The internet is a wonderful resource but has bad elements on it. Safe internet use requires a broader strategy than a single tool, the first step of which is putting the computer in a room where adults can supervise. Machine based filtering can help, and detect activity an upstream proxy can’t, but can never address everything. The strategy to protect children also needs to empower them: explaining that not everything on the internet is what it appears, and teaching them about being a geek, i.e. don’t click on links in spam, be slightly paranoid and protective of your personal information. (That said there’s probably another argument that this is less relevant now, and the problem isn’t that your mother’s maiden name is easy to get hold of from Facebook, the problem is that banks/utilities still think it’s a secure question).

While the goal of preventing access to illegal content is a valid one, and nobody would ever condone the illicit content covered in the core proposal – the idea of a government mandated filters that ultimately won’t even stop all access to the illegal material is worrying. These filters will have knock-ons for legitimate users in terms of false positives and performance detriments.

It’s especially concerning given that some fringe parties holding casting votes in the senate have even more “comprehensive” ideas of what should be banned (gambling sites have been mentioned). While that isn’t part of the government’s proposal today, whenever infrastructure and legislation like this is put in place scope creep take place – witness the UK recent seizing of Iceland’s assets under Anti-Terror legislation during banking crisis.

I leave Australia in a few months, I may yet return, but moves like this make me less keen to.

Details of the campaign against this.

HDMI Fail

Sunday, August 17th, 2008

HDMI was sold as a next generation connector, having used it a bit recently, some of the omissions surprise me.

  1. Explicit support for Audio and Video synchronisation only appeared in version 1.3. The forth revision of the standard. That’s a pretty big omission for a next generation audio-video connector; in the meantime every device seems to have optional delay values to tweak the setup.
  2. More generally the audio support is lacking. While you can deliver multiple audio formats, more with each revision, there isn’t (at least in early revisions) a way of sending both surround sound (AC3, DTS or better) and simple 2 channel PCM stereo at the same time. Devices have to elect which to send, and while some form of auto-negotiation is possible, devices like the HD TiVo require you to choose which form you send. And while your Amplifier can decode AC3/DTS, your TV potentially can’t. If the standard had just said from the beginning that you always send 2 channel PCM as a fallback/base level, and also any better standard if available, no negotiation or configuration would be needed.One workaround is to send Stereo audio to the HDMI connector, and send the AC3 audio out over S/PDIF connection, and get the surround sound amplifier to decode this. And then adjust various delays to provide lip-sync again. This is just faff that could so easily have been avoided by sending both, the connector is not lacking in bandwidth for audio.
  3. The inclusion of HDCP to provide the movie studios a misplaced sense of safety that content is protected. In reality all it does is cause sporadic errors when your Source, Amp and TV fail the negotiation and require you to power cycle everything. Meanwhile in the background is the threat that some studio somewhere could deem your TV insecure, and your expensive flat panel on the wall is prevented from showing certain HD content.

Having spent many years trying to get overly complicated SCART setups to work, I hoped that HDMI would be much better, and while impressed at the quality of HD, I’m disappointed at the level of user intervention and forethought required when they are setting equipment up, much of which could be avoided if some more pragmatic decisions were taken at the initial design meetings.