Networking

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。

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

据说，工大今天进入了IPv6时代，祝贺他们！

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。

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.

Yes, finally postfix is supporting DSN. To quote Witese, this is the first postfix snapshot which provides “full support for RFC 3461..3464 Delivery Status Notifications”!

Jeffrey Hsu (a well known FreeBSD and DragonFly networking stack developer) has committed first cut of TCP ABC implementation for DragonFlyBSD. Described in RFC 3465, this is an improvement that can provide better throughput.

看来配IP的时候真是得小心。原本希望两块网卡互为备份，结果配的一个0xffffff00，一个0xffffffff，00的那个松了，就彻底败了……

历史，永远会嘲笑那些嘲笑历史的人们。永远不要嘲笑任何表面上看来很白痴的东西，因为那样想的人可能很多。

你觉得阻断互联是互联网历史的重大倒退吗？错了，因为事实上，不互联才是真正的发展趋势。

Today, Wietse Venema has announced postfix 2.2.0-RELEASE. To quote him:

The official Postfix 2.2 release adopts widely used third-party patches and a bunch of new functionality that was developed over the past year.Below is a summary of the changes. These and more are detailed in the RELEASE_NOTES document, which also describe the incompatible changes that you should be aware of BEFORE upgrading from Postfix
2.1 or earlier.

• TLS and IPv6 support are now built into Postfix, based on code
  from third-party patches.

• Extended query interface for LDAP, MySQL and PostgreSQL with free
  form SQL queries, and domain name filters to reduce unnecessary
  lookups.