Entries tagged with “Networking,IPv4,IPv6,Leopard,Troubleshooting,Routers” from O'Reilly Digital Media Blog

In the comments to my near-desaster story of last week, several readers suggested I should have a look at a utility called AppleJack. In hindsight, I cannot tell whether AppleJack would have been able to fix the problems that caused my Mac to refuse me access to my main user account. I sure wish, though, that I had it installed so I could at least have given it a try.

In recent months, my MacBook has occasionally slowed down to a sleepy snail's crawl: applications would respond with a major lag, switching between applications would take a few seconds, and the time for launching another application -- including Activity Monitor for hunting down the culprit -- could be measured in minutes. I still have not found a general root cause for this behavior yet, but force-shutting down and rebooting would always get the machine back to its proper performance without any further problems. The last time I had to apply this remedy, though, I could no longer log into my main user account after the machine had rebooted. And this was just minutes after I had left Phil Schiller's keynote, looking at a full week of Macworld Expo '09 still ahead of me. Bad timing, really bad timing...

I don't think the Mac-LEGO Mindstorms NXT connection gets enough web-print. So, I finally took the time to play with LEGO Mindstorms NXT and an Intel-based Macbook connected using Bluetooth. The result was a lot of fun! :-)

I hate the slim Mac aluminum keyboard. Unfortunately, Leopard seems to dislike my Microsoft keyboard. Do I have to buy a Logitech? Sigh.

Psystar, the company that caused a bit of a stir recently by announcing a Mac-clone called "Open Computer" have now posted a video which, they claim, shows that machine in operation.

Mac OS X Leopard DNS whackiness got to the point where I couldn't get anything done on my Macs. So, I hopped on a Windows PC and did more research. Here's the workaround I found for Leopard's network weirdness.

I wonder if my Mac can read my mind. It often crashes late at night when it's time for both of us to go to sleep. Last night, it crashed just as I hit Command-S to save a big project I'd been working on. But this time, it wouldn't reboot. I popped in the usually miraculous DiskWarrior CD, booted from...

Missing Sync for Palm OS 6.0.2-beta lets Leopard users sync with their Palms.

After three years of "community" Mandrake Linux, my work PC has run out of steam. Lots of rubbish and out of date: time for a spring clean and a new operating system! So I decided to do things the easy way: go down to the newsagent and pick a nice looking distribution from a magazine DVD and install that. So...

Oh. I guess I didn't understand the meaning of the word "wireless." It's a trademark. Got it. Sorry, my bad....

Finally, we'll be able to use our EVDO cards via a USB connection!

The strangest NFS problem I've ever troubleshooted... Solaris 9 NFS serever; all clients were reporting "No record locks available."

You see a fairly inexpensive Cisco router advertised to support IPv6, so you scrounge up email addresses for people you know can connect you to the 6bone, dust off that IANA (or RIPE, APNIC) paperwork with your /32 allocation information, and purchase. What a mistake that was.

Where HTML went wrong at W3C, and WHAT to do about it

In my continuing quest for the ideal p2p NAT/firewall traversal stack, I ran across this useful presentation a while ago from Dan Kaminski of http://www.doxpara.com/.

This is a nice synopsis of major P2P applications and their networking, in the form of a "how to block these apps". Gives some insight on P2P and firewalls.

Commercial wireless networks don't seem to be such a hot proposition and the latest studies support this. WiFi is growing, but revenue from WiFi services are not.

University of Twente in the Netherlands has a 300+ acre wireless hotspot, using 802.11b and a.

As Clay Shirky pointed out in his ZapMail essay, business models for wirless networking are elusive. Now we're seeing the first signs of this as the big companies start rolling out larger wireless networks.

An IETF standard for NAT traversal - excellent.