Networking

一个未能完全实现ESMTP的破烂防火墙，以及aaazzzaaazzz邮件的罪魁祸首。大家千万不要用，我打算抽时间写篇文章来介绍为什么PIX会破坏电子邮件的安全性。

由于持续不断地受到国内某著名邮件服务提供商的不标准退信：

This message is generated by CxxExxxL email system.I’m sorry to have to inform you that the message returned

你发送到XbXrXcXm@XXX.XXX的邮件由于以下原因被退回 : XbXrXcXm@XXX.XXX 邮箱容量满

一直想做的一件事：跨越三网的MX和NS互备，我认为基本上可以应付个人网站任何常见规模的网络间断和服务器宕机导致的潜在丢信问题。

(此文档属于备忘录性质，作者不对此备忘录的正确性、条理性、实用性、适用性承担任何责任。
版权所有 (c) 2006 李鑫，保留所有权利。未经作者书面或PGP签名许可，禁止转载、修改、复制，或以其它未经授权的方式使用本文内容)

Junsu has mentioned SCTP, a stream protocol that is quite interesting. A KAME implementation for FreeBSD is available for years.

也许是时候了，因为今天的互联网已经不再是以前那个人人都愿意和你做好邻居的互联网，假定人人都是良民的互联网设计者，如何能够设计出完美的适应钓鱼、蠕虫、不良信息等丛生的新网络环境？

据说，工大今天进入了IPv6时代，祝贺他们！

最近几天开始琢磨Twisted了。打算用Twisted来做一些东西，不过不知道它的线程是否能使用阻塞I/O……

http://www.dnsreport.com/ 提供了一项检查服务，帮助你查找自己域名DNS配置中存在的问题。过去曾经以为自己很明白如何配置Internet域及其服务，查了才知道差很多，然后才加以改正。

Today I have some ideas about P2P application framework. Would check if there is any available ones and whether they can fulfil my ideas. Maybe I would start a project to implement these ideas in Python and/or C++.

The F5 gateway has became incredibly errornous after they migrated from FreeBSD to Linux, so I call this a bad move.

In the Good Old Time(TM), they run FreeBSD on their boxes, and I have never encounted a single problem when doing everyday work. After they migrate to Linux, they start to inject error packets into your connection and therefore, SSH is broken. This is critical for development, IMHO, and prevented us from being able to work.