Monday, September 13, 2010

Feature library to create instance of IDS Intrusion Analysis (2)



Fourth, determine the characteristics of "candidate"
To better understand how to develop value based on the special header data, following an example by analyzing the whole process in detail.

Synscan is a popular system for scanning and detection tool, because its code is used to create the beginning of the Ramen worm fragments and steal the show in early 2001. Synscan with the implementation of behavior is typical, it sends packets with a variety of distinguished features, including:

IP address information from different sources
TCP source port 21, destination port 21
Service Type 0
IP identification number 39426 (IP identification number)
SYN and FIN flag set
Different set of serial numbers (sequence numbers set)
Confirmation number of different collections (acknowledgment numbers set)
TCP window size 1028

Here we screened the data above, to see which features more suitable to do data. We are looking for is illegal, unusual or suspicious data, the majority of cases, this all reflects the loopholes exploited by attackers or they use special technology. The following are characteristics of the data candidates:

Only with the SYN and FIN flag set of data packets, which is recognized as signs of malicious behavior.

ACK flag not set, but with different values of the data packet confirmation number, but normally should be 0.

Source port and destination port are set to 21 packets, often associated with the FTP server. Port the same situation that are generally known as "reflexive" (reflexive), in addition to some particular individual, such as NetBIOS when the newsletter, under normal circumstances should not have this phenomenon. "Reflexivity" TCP port itself does not violate the standard, but in most cases they are not expected values. For example, in a normal FTP dialogue, the destination port is usually 21, but the source port is usually higher than 1023.

TCP window size to 1028, IP identification numbers of all packets for 39,426. According to IP RFC's definition, two class rooms in the data value should be different, so, if sustained, would show that the suspicious.

5, announced the best features of "winner"

From these four candidates, we can select a single feature as the header-based data, a number of combinations can be selected as the feature data.

Select a data as the feature has great limitations. For example, a simple feature can only sign with the SYN and FIN packets, although this may well suggest that we might have a suspicious behavior, but why not give place for more information. SYN and FIN are usually combined with attacks on fences and other equipment, as long as they appear, they indicate the scan is taking place, information is being collected, the attacker will begin. But only those it, what we need is more detailed information.

Select more than four joint as the feature data is not realistic, because it looks a little too special. Although the act to provide accurate information, but as more than just use a data feature, the lack of efficiency would appear far. In fact, the feature definition always in efficiency and achieve a compromise between accuracy. In most cases, the simple features of complex features more likely than false positives (false positives), because the former is common; complex features more likely than a simple feature omission (false negatives), because the former is too full, a software attack a feature will change as time goes on.

More does not work, less is not entirely by the actual conditions. For example, we want to determine possible tool for attacking what is, then the SYN and FIN flags in addition to other, but also what other properties? "Reflexivity" port though suspicious, but many tools are used to it, and some of the normal communications have this phenomenon, it is not appropriate selected features. TCP window size of 1028 despite a bit suspicious, but it can also happen naturally. The same IP identification number 39426. ACK ACK flag value is not obviously illegal, so it is suitable for selected characteristics of the data. Of course, according to the different environment, timely adjustment or combination of features of the data, is the only way to achieve optimal results.

Next we create a real feature, used to find and identify synscan TCP packet sent in each of the following attributes:

Only the SYN and FIN flag set
IP identification number is 39426
TCP window size to 1028

The first project is too general, the second and third joint projects in the same situation in the packet are not so many, so these three items together can define a detailed features of the. Together with other synscan property does not significantly improve the accuracy of features, can only increase the cost of resources. This, the software features that distinguish synscan to create finished.







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Wednesday, August 4, 2010

Create a new paradise


Page Creator is what?

Production is under the effect of web page map, realized it into your browser to browse the web. We have used or heard someone else introduced a lot of Web page creation tool. FrontPage, Dreamweaver, GoLive, etc. These are what we usually know web design software, FrontPage is no doubt an easy to use, powerful web authoring tool.

Now launched a new version of FrontPage, and he is still with the launch of Office, but unlike in the past, the new version of the Office family of software is no longer named a year, using the new naming, MicroSoft will its crown known as Office XP, XP is the word Experience ("experience") of the abbreviation. Therefore, we introduce the following is FrontPage XP. There is no doubt that our production process the following pages will be a new experience different from the previous process.

Preliminary Design - New Site

Start FrontPage XP, if when you first start FrontPage XP, FrontPage will find the new version of the user interface made some changes to the right there is an almost one-fifth of the screen space occupied task window (Figure 1), focused on a number of major command, and these task orders will be different as you change operation. In fact, Office XP for every application, from Outlook to the Publisher, have the task bar.



Figure 1 FrontPage XP interface

We chose a blank site, because we needed to create a site, rather than a page, of course, we have established Guocheng the site need to add pages of time, of course, is the option of creating a blank page. Then pop-up Web site template window, it is actually a lot of templates to choose from, such as: personal site, the company demonstrated the site, customer support sites, etc., these templates are very good choice. For simplicity, we choose individual sites, Figure 2 is the personal site template to use to establish the site's pages.



Figure 2 with the personal site template to establish the site of the page

Let's switch to hyperlink to see FrontPage XP view state is how to design the whole site it.



Figure 3 View Hyperlinks

On the left of the tree lists all the pages, you can press the plus and minus sign to expand and contract. The right side of page lists the current connections, you can also press the plus and minus sign to expand and contract.




[Next]



Basic elements - text, hyperlinks, images

Create a new page before it, or start from a blank page.

First is to set the page properties, right-click on the page, select the page attributes, of course, you can also select the main menu File -> Properties, then the pop-up dialog box you can set the page properties, and as Figure 4.





General Settings is the page title, position, background music and the use of scripts, etc.; background set the background color, image and link colors, etc.; margins set the page margins, etc.; can also set custom variables and language options, etc..

The application of the text on the site is the most extensive and informative website of a large amount of text will inevitably be used, but how good these texts became the editor in front of us the first question. In the past written in HTML often have to consider the text before and after the HTML tag, which is a troublesome thing. But FrontPage XP, this becomes a simple matter anymore. We simply add the page number character, then you can change the character of the properties of the toolbar, etc., all operate the same as in Word.



Figure 5 character property set format toolbar

Regard to the specific character property is set, you can choose to set the characters after the right-click, then select the font, you can see a more robust set the font options.

If you think this set is not sufficiently standardized or too tired, his lazy hands, FrontPage XP also gives you a convenient way - to set the theme in FrontPage XP, users can use the theme of the number 67. Each theme has a different look and feel, including buttons, background, fonts, etc.. Users not only can a web page using a theme, and can adopt a theme throughout the site. Moreover, the current FrontPage XP, have more operational, you may want to modify the style of these themes.



Figure 6 themed

Of course, for the characters, we can give him set the hyperlink, select the characters after the right-click, select hyperlink, and then Hyperlink Settings dialog box you can hyperlink Fat Tseung FrontPage XP settings than any version of FrontPage to be strong even stronger than the more tools such as Dreamweaver.



Figure 7 hyperlink settings

Not only can set the current folder, browse through the pages and the recently used files, and can be a bookmark in the document, new document, e-mail addresses, of course, the page can be directly address.




[Next]



For any content on the page, we can add dynamic HTML effects, select the intended effect of the characters together, pictures, etc., and then in the main menu, select Format -> Dynamic HTML effects, then you can set specific DHTML effect , and the format is (choose an event) application (select an effect) (choice set).



Figure 8 Dynamic HTML Effects

The page transition in the main menu of the format -> page transition can also be set. Do not underestimate this little web page transition effects and dynamic HTML, if used properly, he can add much color to your page.

Web page design, graphics are not only simple to express a message or meaning, but also the style of the performance of a Web site to enhance site features. FrontPage XP offers many painting tools, used to using Word and PowerPoint users will not be unfamiliar to those drawing tools. Users can also use the Office Clipboard to other Office applications made in the image pasted into FrontPage XP. FrontPage XP Although not directly produced in the network is now popular to use GIF, JPEG and other file formats, but can indirectly into other software to make good paper. Select the main menu

Above we introduce the basic elements of the pages in FrontPage XP - text, links, images, documents produced, from the following, we introduce a FrontPage XP some of the advanced technology. Although referred to as advanced technology, but they are still in FrontPage XP is very easy to achieve.

Decorated - the use of advanced technology

Let the top of the page to add a page banner, which is in the main menu, select Insert -> Web page banner, then select the image. Then we can see this on the page string of characters "[add this page to the" Navigation "view to display page banner here]", we switch to the navigation view, we have the page from the left drag the folder list to the right of navigation, you can see a dotted line out of this that is the location of navigation.



Figure 9 View navigation

Then switch back to the page view, you can find the original character has changed its appearance. Here, "" The new experience is set in the front page headline.



Figure 10 Effect Web Banner




[Next]



FrontPage XP in some form can be inserted to improve, to insert Leixing shown in Figure 11, some of the other Web page creation tool li hardly yield to pass through the very simple to complete, such as file upload, imagine want to see if the effect in Dreamweaver to do this inside, how would you do it? In FrontPage XP, the course easy, you only need to click a button, and then all the remaining operations are handed over to FrontPage XP has.



Figure 11 shows the lower left corner into the file upload form is displayed, select the form in the future can be set through the Form property to submit this form to submit the contents to a file, an Email address, or directly into the database, or ASP, etc. submitted to a script file, you can also option to set the parameters.

Form in the web design is far from the general concept of the significance of the application form to understand, its biggest use is to control page elements to make web publishing more order house in order. In addition to the layer of dynamic HTML, the table is the only page elements can display the tools required by designers. The FrontPage XP table in operation has a simple to operate the same as in Word. If you are familiar with the Word in the form of action, then the FrontPage XP operation is simple in form, if not familiar, it does not matter, because it really is too simple. All settings are on the table in the main menu of the table settings. As shown in Figure 12.



As we all know, FrontPage will each launch a new version of the new or enhanced features of the WEB components, is no exception in FrontPage XP, FrontPage XP's WEB components are unparalleled, unheard of by the powerful WEB components, users can quickly add advanced technology in the website. The new components which include gallery, links, articles, save to the database, automatic Web content. Using FrontPage XP of these advanced technology, users need not be complex programming can achieve professional results, saving a lot of time. In addition to the above components of these new things, FrontPage XP also adds some new tools, such as: automatic Web content, activities, discussion boards, dynamic online questionnaire, visit analysis, Top 10 lists, enhanced reporting capabilities and so on. It is these tools to make the heavy work of webmasters easier again. One gallery features easy to use yet powerful, let's take a look at how to use Photo Gallery.

In the main menu, select Insert -> WEB Components -> Photo Library, then select the slide layout. FrontPage XP for us four picture gallery format, namely: horizontal layout, montage presentation, slide-style layout and vertical layout. This four ways by FrontPage XP to create thumbnails without our manual. Then in the picture library property, first add this page we intend to display images, these images, we can pre-define their image library in the entire sequence shown is through the move, down to achieve. Moreover, for each deputy picture, we can add the title, and we can define the title displayed.




[Next]



File inside the main menu select Preview in Browser, and then choose to use the browser and resolution, click on the preview, we can see in the browser page that we had.



Figure 13 page preview

Can see that top of the page is a preview of a small picture, following the big picture. Thumbnail by line presentation and can scroll left and right, and in the top of the selected pictures in the following central to full size display.

In FrontPage XP there are some useful web tools such as the recalculation of hyperlinks and web page optimization. In previous versions of FrontPage described the situation in the over-sized pages in FrontPage XP in nothing, they no longer exist. You only need to do about web page optimization, you can see in the report page you have smaller lot. In FrontPage XP requires only a simple click you can complete the Simplified Chinese and Traditional Chinese web of mutual transformation. So you no longer need to create multi-language Web site and Fanlao a tedious thing.

To create a paradise

A brilliant website creators, not only hope to create a beautiful page, and want to generate the most streamlined and efficient HTML source code. This is the FrontPage XP gives you a gift, you can direct the source code of the page precise control, you can control the situation, you can feel the pages written in all the fun. FrontPage XP has almost become an active wizard, it hear your command, you should tell every dream. For you to create a new paradise!






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Sunday, July 25, 2010

Baidu Key words after switching price inflation Phoenix Nest 8 times



April 12 news, Baidu (NASDAQ: BIDU) more than four months before its PPC advertising system by the full switch to "Phoenix Nest", the new rules reduce the number of ads per page, which caused the price of popular keywords spikes. Industry specialist monitoring data show that the game industry, the highest price of the most popular keywords have increased eight-fold. This Baidu's performance has been very positive impact.

Beijing-based search engine marketing (SEM) company Yidesiqi (adSage) SEM software developed by AFS almost real-time monitoring software can search for key words, 10 seconds to monitor the time and tens of thousands of keywords automatically bids; AdSage company has more than 300 customers, and the amount of millions of dollars are invested in big clients (Baidu in 2009 invested 14,000 yuan on average each customer), so they Baidu Key words total price movements have first-hand information.

adSage Lei Peng, senior vice president, April 10 (last Saturday) in Xiamen, Fujian "era of 2010 to win the global search engine marketing margins of the General Assembly to disclose to the Netease technology, based on their monitoring, the price of Baidu Key words switch to Phoenix After the nest, there has been rising, the game industry has gained popular keywords maximum eight times, the real estate industry has also increased rapidly, in general, popular keywords have the prices.

Baidu last December 1 鏈?comprehensive search experience for users to switch to improve the phoenix nest, the number of ads on the search page was compressed, the industry had previously forecast prices to popular keywords appear higher, but still allow some of its higher speed advertisers and the industry by surprise.

Lei Peng said that despite the emergence of keyword prices rose, but the new system with higher precision, the conversion rate of ads have increased, so advertisers return on investment (ROI) there is no decline, and even some advertiser ROI is also improved, so advertisers do not reduce the running program.

Baidu Key words price increase on Baidu's performance is good news. Previously, the switch on the performance of Phoenix Nest, Baidu executives in the February 10 fourth-quarter earnings conference call on the analyst's position is that the "difficult to predict."







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Wednesday, July 21, 2010

Ma and Wang Shi in the end how much of the donations for the disaster area?



Countries are in trouble, compatriots in trouble, as most of the wealth of Chinese entrepreneurs who harness, how much money should be donated to disaster relief? This topic has caused much debate.

To tell the truth, is not the number of donations, but in a disaster area people with heart to overcome difficulties. But then again, heart is also with the ability of different people have big or small. "Spider-Man" in a famous lines: "The greater the greater the responsibility," as the phrase is "do not ask how many contributions" to add.

5.12 After the earthquake, Wenchuan, almost disappeared from the map, so far, the national death toll from the earthquake more than 30,000. People in disaster areas around the world lent a helping hand, especially a lot of entrepreneurs to donate, impressive, including the Formosa Plastics Group and Mr. Shao Yifu each donated 100 million. May 16, according to media statistics, Taiwan companies and individuals contribute nearly 600 million yuan, while closing 14 standings in the mainland's top 10 richest tycoons disaster relief donations total only about 32.5 million yuan, friends shouted gap too, accusing the mainland businessman "merciless", "lack of social responsibility" and gone.

At this time, two entrepreneurs gave us a lesson. One is Wang Shi, there is one that is Ma. Vanke Wang Shi and his estate donated 200 million, also requires employees not more than 10 donations away, the father of the Chinese e-commerce and more surprise Mr. Ma Yun, who donated a dollar.

Wang Shi said that China is a country prone to natural disasters, contributions should not be a burden on businesses and individuals. Ma said that China's entrepreneurs now have the ability should not be used even if charitable, but may wish for the "expanded reproduction", "under those fluorescent charitable donations, donate a dollar every time I think that is enough."

Wang Shi and Ma are calm and rational manner, makes some back hair cool. Wenchuan earthquake in China in their hearts become "frequent natural disasters" in the latest case, what killed 3 million people, there are still tens of thousands of people missing the Wenchuan earthquake, really achieve the "frequent" the point of it? Countries in trouble dedication and commitment to social responsibility, this is only moral and conscience bottom line aside, the basic requirements of an enterprise, how to become a burden on business?

"Donation is not how much the expression of a dollar is enough attitude" It is true that there is nothing wrong, but it it not an excuse to evade responsibility. If everyone "donated a dollar," to show everyone the "attitude", which actually lives at home hit an impasse, which is indirect violence Heyi? Hit several hundred thousand people waiting for food and other drink ah, they need money, need materials, need tangible assistance, rather than theoretical. A few days ago the media reported that a beggar donated 102 yuan, are today's social responsibility to bear the Gai Bang Brothers?

To donate a dollar, why not contact early Jet Li's "One Foundation"? People across the country ride out the storm in time, separated in the countless lives through time, keep those front-line disaster relief came the news of the miracle of life, I surprised to hear Mr. Wang Dan and his Mr. Ma Yun's "Modern Economic Theory", is more alarmed at what they rise above the normal of joy, anger, sadness and sense of national identity of the so-called "rational."

Earthquake, is the baptism of our generation is our rite of passage is unforgettable memory of the Chinese nation, let us embrace the truth, let us mutual help, so we have money to pay, it was the people, blood donation - Wenchuan emergency!!!







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Friday, July 2, 2010

Lohan RMVB to DVD

Lohan RMVB to DVD is the best RealMedia converter software. easy convert Real Media files(.rm, .rmvb) to AVI, MPEG-1, MPEG-2, VCD, SVCD, DVD files. convert RM/RMVB to AVI DIVX XVID MPEG VCD SVCD DVD and burn to DVD/CD. You can change the codec/system type to PAL or NTSC, and adjust the video size of the output files . It supports to convert almost all video, such as: RM to AVI, RM to DIVX XVID, RM to MPEG-1, RM to MPEG-2, RM to WMV, RM to VCD, RM to DVD, RM to PSP Video, iPod Video, Zune Video, iPhone Video...

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Thursday, June 24, 2010

Lohan AVI to MPEG

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Thursday, June 3, 2010