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Why indirect xdm probably doesn't work on your Linux machine

Wandering Thoughts | April 9, 2007, 1:18 a.m. | Original

We recently had a fun adventure of debugging indirect XDMCP on our Ubuntu LTS 6.06 (Dapper Drake) servers. The problem was that youcouldn't go from the chooser on one server to logging in on another server,although you could log in to the machine the chooser was coming from.

It turns out that this is broken by default in pretty much every modernLinux distribution, and the culprit is IPv6 support. In fact it makes agood illustration of why adding IPv6 support is not

A limitation of Python properties

Wandering Thoughts | April 8, 2007, 1:18 a.m. | Original

A periodically annoying limitation of Python properties on instances isthat you cannot remove or replace a property. (You can implement del in your property, but this is not the same thing.)

This restriction exists because properties are actually attributes onthe class, not attributes on the instances. Because of how attributelookup works, you can't even sneak a replacement in through theinstance's __dict__ .

This means that you can't use properties to implement a highly efficient'generate once and

Weekly spam summary on April 7th, 2007

Wandering Thoughts | April 8, 2007, 1:18 a.m. | Original

This week, we:

got 13,022 messages from 240 different IP addresses.
handled 18,021 sessions from 1,234 different IP addresses.
received 169,572 connections from at least 5,382 different IPaddresses.
hit a highwater of 43 connections being checked at once.

Volume is about the same as last week ,although evidently we got a big burst of connections some timethis week.

Day	Connections	different IPs
Sunday

穿PRADA 的惡魔 The Devil wears Prada

silencemo | April 7, 2007, 7:55 p.m. | Original

導演: 大衛法蘭基爾(David Frankel)
主演: 梅麗史翠普(Meryl Streep), 安妮夏菲維(Anne Hathaway), 史丹利杜斯(Stanley Tucci), 艾哲安桂尼亞(Adrian Grenier), 西門碧加(Simon Baker)

電影上畫時，我始終沒有入場的意欲，理由很簡單，我在現實生活中已經見識過

明明不是天使

空姐的行李篋 | April 7, 2007, 1:12 p.m. | Original

今早七時多，突然從夢中醒了。

摸摸面頰，涼涼的，都是眼淚。
_______________________________________

我坐上由司機駕駛的車，男人早在車上等候。到達他的家，播放著我喜愛的

An interesting observation about web cracker behavior

Wandering Thoughts | April 7, 2007, 1:18 a.m. | Original

I recently got around to setting up a web site for a top level .orgdomain that has existed for more than a decade but previously neverhad a website or even had a 'www..org' host defined in its DNSrecords. I did this with a name-based virtual host on a machine that hadnot previously been running a web server on port 80.

Within minutes , crackers were poking that virtual host in an attemptto exploit a PHP vulnerability; by contrast, it

Why network booting is not a good answer

Wandering Thoughts | April 6, 2007, 1:18 a.m. | Original

It might seem that the obvious answer to my desire for remotecontrollable DVD drives is to netboot my machines.Unfortunately it's not a good answer.

Booting a machine is only a tiny sliver of the problem; the real problemis (re)installing and testing machines. While a lot of operating systemshave some sort of a network install system, there are three coreproblems with netinstall setups: they are almost always second classcitizens (partly because they are usually used much less), they takeextra work