According to the latest BTD 2.0, I would like to try Erlang because it is very promising for real-time application. Anyway, its concept is totally different from what I have in my mind. That is the great barrier at least for me. Well, I found a book for Scheme from here which is a Lisp dialect. Lisp is another functional programming language like Erlang. It is a good start. Anyway, I'm not a good student to read long text like this. I prefer a kind of learning by example and I found bencode in Erlang.

I'm going to try the latest trial version of SAP NetWeaver 2004s Java and ABAP on a virtual machine based on VMware Server. First of all, I have to download all packages from SDN.

Sometimes, the standard kernel bundled with Ubuntu may not fit your environment. For example, your server is attacked regularly via bad behavior in the network. This behavior is called denial-of-service or DoS. There are so many techniques to DoS someone. The most classic one is TCP SYN flood. The effect of this attack is to full the backlog buffer in kernel. Anyway, this attack is not popular anymore. Recent kernel could handle this attack easily because it is very easy to detect TCP SYN flood. However, the worst thing I don't want to see is the attacker flood the server by established TCP connection. It is hardly to distinguish this attack from normal behavior. There are several workaround to protect the server against this attack.

1. Decrease socket timeout
2. Limit the number of concurrent connection per IP address

My favorite e-mail reader is Thunderbird. Anyway, running Thunderbird all day all night is not funny at all especially when I have many thousand mails for a year. However, I would like to get a sort of notification as soon as possible to let me know about the incoming mails. I want to have light-weight mail notification tool for daily use.

Ones said that cracking WEP is easy, especially when you are on Linux. I tried myself with unsuccessful because I couldn't remember the steps. Anyway, it is very easy to follow a screencast (or from ) I found last week. The screencast in YouTube is not as good as it should because of higher degree of compression so I recommend you to see the another one in WMV.

A WinXP machine beside me has been infected by a sort of malware. I don't know what it is but I'm sure it is very annoying. Avast! didn't help me to fix this problem. It is not the fault of Avast! because it is totally free of charge and I know it is just an antivirus software. Malware may not be categorized as a virus. Anyway, I can't live with this one anymore because of its annoyance.