fwknop stands for "Firewall Knock Operator" and is an upcoming piece of software that will be released at the DEFCON 12 conference in July, 2004 in Las Vegas.
fwknop implements network access controls (via iptables) based on a flexible port knocking mini-language, but with a twist it combines port knocking and passive operating system fingerprinting to make it possible to do things like only allow, say, Linux-2.4/2.6 systems to connect to your SSH daemon.
fwknop supports shared, multi-protocol port knock sequences along with both relative and absolute timeouts, and coded port knock sequences encrypted with the Rijndael block cipher.
The System Management BIOS Reference Specification addresses how motherboard and system vendors present
management information about their products in a standard format by extending the BIOS interface on Intel
architecture systems. The information is intended to allow generic instrumentation to deliver this data to
management applications that use CIM (the WBEM data model) or direct access and eliminates the need for error
prone operations like probing system hardware for presence detection.
The MD5 Message-Digest Algorithm
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard. Distribution of this memo is
unlimited.
Acknowlegements
We would like to thank Don Coppersmith, Burt Kaliski, Ralph Merkle,
David Chaum, and Noam Nisan for numerous helpful comments and
suggestions.
Perl and XML
XML is a text-based markup language that has taken the programming world by storm. More
powerful than HTML yet less demanding than SGML, XML has proven itself to be flexible and
resilient. XML is the perfect tool for formatting documents with even the smallest bit of
complexity, from Web pages to legal contracts to books. However, XML has also proven itself to
be indispensable for organizing and conveying other sorts of data as well, thus its central role
in web services like SOAP and XML-RPC.
As the Perl programming language was tailor-
查錯問題
文件名：check.*
輸入文件：check.in（文本文件，選手按規定格式自行創建）
輸出文件：check.out（文本文件）
問題描述：
很多英文文本編輯軟件都具有輔助查錯功能。現在有一個標準的詞庫，請根據該標準詞庫編制程序實現查錯功能。
輸入格式：
從文本文件check.in中讀入數據。
第一行一個整數N（N≤10000），表示標準詞庫中單詞的個數。
第2--N+1行，每行一個標準單詞，單詞的長度不超過10。
第N+2行開始為待查文本，其單詞間用空格（或連續空格）分隔，單詞的個數不會超過1000。
輸出格式：
輸出到文本文件check.out中。
（1）第一行開始輸出拼錯的單詞；
（2）最后一行輸出一個整數表示拼錯的單詞總數。（拼錯相同的單詞重復計數）
注意：如果一個單詞在字典中無法找到，那么我們就認為這個單詞拼錯了。
輸入樣例：
3
like
this
we
we like the sport
輸出樣例：
the sport
This text introduces the spirit and theory of hacking as well as the science behind it all it also provides some core techniques and tricks of hacking so you can think like a hacker, write your own hacks or thwart potential system attacks.
我記得好像的關于緩沖區溢出的
A java GUI interface program used to download a batch of files in a specified URL, or a kind of similar files like pic01, pic02, pic03, ..., pic99, etc. And it can download all the links of index.html automatically.
To review what a metaball is, and how to render them and to describe a
new optimization I ve made for rendering metaballs. For complex scenes,
it can render hundreds of times faster, though I m certain others have
discovered this trick as well. It does very slightly change the
characteristic shape of the blobs, but there is no loss in image quality
whatsoever. (I actually developed all this about two years ago, but just
now felt like writing it all down, and had the time!)
