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First blog back in HK.
It's always great to be back, great food, great place ... not to mention it's a well-earned holiday. 
Except as usual when one is back for the summer it is a bit sticky and humid. Once it was so hot that I actually heard the fan on the powerbook turn on ... it turned off when I blew it with a fan. It's not very pleasant having it on my lap now. But just being back feels good, so I'm not complaining.
Ah yes, ... being back in HK also means that I have to put up with the utf8-ness of MacOS X. This basically means no typing Chinese ...
Great soccer games, but watching too many games at 2:45 with alcohol binge from say, around 12 makes you fall dead after the finals. Pretty much only just recovered.
I left the Linux box on back in Australia since I still wanted to SSH in ... but it seems telstra in all its good timing decided it was time for another round of IP change. I now have no idea what the IP is and I can't get back in. Argh.
Internet in HK is great too ... In Australia there is an 128K upload limit for cable@telstra. This is okay, but they've decided that upload traffic should be unlimited for short bursts, and then it gets cut off so that the AVERAGE speed is 128K. This is moronic, since if you were doing some heavy uploading and using an application where delay matters, the latter would suck. I'm not sure who's in charge of that particular department at Telstra, but whatever they are smoking, let's not inhale ....
Next up would be to find out how I did in my exams. Results due in about a week.
Hmm ... and the dual athlon that I was having lockup troubles with seems fine now. Probably just a random kernel locking problem.
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This is just lame. Just any d
This is just lame. Just any dynamic ip dns service will have your box found anytime. signup a dynamic ip dns and use ez-ipupdate.
I'm behind a HW firewall whic
I'm behind a HW firewall which isn't mine so I am not sure how well ez-ipupdate would work.
Things are not as simple as people always think it seems, unfortunately.
What? If you can access your
What? If you can access your box from HK through ip, I don't know why you cannot use a dynamic dns service. Most dynamic dns services are very simple. You just visit their web site. Fill a form with your dynamic ip and your account info. ez-ipupdate make it easier by save your account info in a config file then check and update your ip periodically.
What HW firewall has anything to do with it? ez-ipupdate is not a tcp/ip server application, it is a client application. Unless your firewall block out going ports except 80. For some dynamic dns service which use proprietary protocol, a firewall might cause some trouble.
Anyway, just for your information.
does it send out a heartbeat
does it send out a heartbeat periodically and the DDNS determines my IP based on the information returned by say, getpeername(2)?
Anyway, it's not really that urgent since cable IP hardly ever change and I'm only back for a short trip.
No, the update daemon will po
No, the update daemon will poll your ip periodically and send the new ip to the DDNS register, normally using a html form through http. Most DDNS don't guess your ip. You might be behind some proxies.
The way the daemon determine an ip is all hacks, I believe. There is no portable way to get a local ip. You can specify a network interface. But the detail doesn't matter. It just works in the end users view.