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Hoi, ik ben Iljitsch van Beijnum. Op deze pagina staan alle posts over alle onderwerpen.

IPv6: to firewall or not to firewall?

Yesterday I wrote about my new printer, which supports IPv6. I posted a photo on Twitter with the printer's IPv6 address, and before long people attempted to print over the internet. Eventually, two succeeded.

I'm not very happy that Canon allows this by default, and doesn't give you any way to block this other than to disable IPv6 or put the printer behind a firewall.

Here's another link to that part of the story, as the title I used yesterday doesn't mention IPv6 or firewalling.

Permalink - posted 2015-03-04

The Canon PIXMA MG7550 and the state of printers in 2015

Today, I bought a new printer: a Canon PIXMA MG7550...

Full article / permalink - posted 2015-03-03

→ 10 myths about psychology, debunked

Great TED talk about ten myths about psychology. I especially found the one about the psychological difference between men and women interesting. Only 2% of women can throw a ball farther than the median man. The two biggest mental differences between men and women are spatial ability and language. But a third of women has better spatial ability than the median man and a third of men is better at language than the median women. That's only 17% off from being completely identical.

So it's not really a case of Mars and Venus. It's more a case of, if anything, Mars and Snickers: basically the same, but one's maybe slightly nuttier than the other.

Permalink - posted 2015-03-01

Sunrise!

Image link - posted 2015-02-28 in

→ How Bad These Snowden Leaks Have Become

Andy Ihnatko, linking to a statement from Gemalto about the alleged stealing of SIM card encryption keys:

Good lord. There’s going to be a monument to Edward Snowden some day and it had better be a damn big one.

Permalink - posted 2015-02-25

→ HTTP/2 finished, coming to browsers within weeks

So HTTP 2 multiplexes multiple transfers over a single TCP session. It would be cleaner to do this using SCTP, which implements multiple streams natively. But having to figure out whether you can use SCTP or need to use TCP would be a significant complication, while negotiating the use of HTTP 2 over TCP port 80 should be relatively straightforward.

I'm glad the mandatory encryption didn't happen. Encryption is important, but there are times where it's unneeded, and forcing people to use it when they don't want/need it would just make for even more carelessness with certificates than we're already seeing today. For instance, the server serves the exact same copy of this webpage to anyone who requests it, so there's no point in encrypting it. Encryption would just add more time consuming round trips, use more battery power, and require me to buy a certificate.

Apparently most of the browser makers are already on the case, no mention of Safari, though. I'm interested to see how much faster HTTP 2 will be in practice.

Permalink - posted 2015-02-18

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