What is a port scanner?

In the FAQ section we have with you has been repeatedly considered the various terms associated with information security - a branch of information technologies, which today is tremendous interest worldwide in connection with what is growing, as they say, by leaps and bounds. It is worth noting that the term, which we will consider with you today, is very widespread throughout the world, and therefore have some idea of its meaning is anyone who is more or less understands computers.

Port scanners is a software product designed for network hosts (server nodes) with open ports and are thus vulnerable to malicious software and malicious attacks. By hackers, of course, port scanners are also used most that neither is active manner. Typically, port scanner scans all the ports of each host to detect those that are open, although in some situations (for example, when dealing with any specific network worms, which uses for its reproduction is quite certain network port) can done scanning all the hosts only for opening a single port (to accelerate).

Technically, port scanning is carried out by sending a packet (usually the protocol TCP/IP) sequentially through all possible ports or through a preset list of ports for a specified list of addresses, and then analyzes the server responses to queries and it identifies open ports. In addition to scanning for TCP/IP (which, incidentally, can be realized by using several different techniques) are widely used as a scan using the ICMP and UDP, which uses less hosts, which, however, less informative for an attacker who plans to then use the TCP-Protocol . Check the set of hosts, as a rule, it is more convenient in parallel multithreaded scanner, ie each of several simultaneously running threads checks its host.

It must be remembered that the scanner port should be used with caution, even if you suddenly decide to use them for completely legitimate test of computers and remote branch of your company. The fact that many providers are in black and white prescribed in the contract to provide services to a ban on the use of port scanners, the activity of which is found quite good administrators.

News for developers - 8

Image via CrunchBase

The company Zend Technologies has announced the inclusion of technology platform, Zend Framework to support a single format AMF (Action Message Format) to exchange messages between components of the Flash-and Flex-application development environment Adobe Flash Builder 4. New version of Adobe Flash Builder 4, thus, allows us to combine server and client components on the basis of Flash, Flex and PHP in one application. Completed applications are created using Adobe Flash Builder 4, can be run on application servers and Adobe Flex application servers Zend Server. As stated in the official press release format support AMF was the final link for the development of combined applications with Zend Technologies and Adobe where it is convenient. The binary nature of the AMF format reduces the actual amount of data transmitted between application components, which allows you to create a new platform, the most powerful and large-scale applications, including systems for the global level.

Red Hat announced new versions of two of its products from the family of JBoss - Enterprise SOA Platform 5.0 and Developer Studio 3.0. Package JBoss Enterprise SOA Platform 5.0, as a single data bus, is designed to integrate applications, services, transactions and business logic components into a single architecture, business automation. This package developers are waiting for funds standby command protocols, management console, as well as the mechanism for the enforcement of rules, which can be controlled with the help of JBoss BRMS. New SOA-platform can integrate applications and services as a "cloud" systems, and within organizations. The new version of the IDE JBoss Developer Studio 3.0, built on an open environment Eclipse 3.5, supports the JBoss Enterprise Application Platform 5.0. In addition, Enhanced support for platforms such as JBoss SOA, Portal and Data Services.

The newest Release JavaScript-Libraries Yahoo! User Interface (YUI) 3.1, for creating user interfaces in Web applications, according to OpenNet. The package is distributed under a BSD license and consists of basic infrastructure (YUI, Node and Event) and a set of tools (Animation, IO, and Drag & Drop). The new version has been prepared component infrastructure necessary for the implementation of widgets; appeared Internationalization utility - a module for internationalization of applications, allowing separate language resources from the code; updated widget TabView, intended for creation of tabs, the new module allows you to organize a sort sorted lists; boot loader YUI 3 allows you to download any third-party modules developed by independent developers.

April 12 in Russia will be officially presented to the next generation development platform Microsoft Visual Studio 2010. On the Microsoft web site will be live online broadcast of the conference in Moscow. The new version of Microsoft Visual Studio supports the full development of applications, from architecture and design c ending testing of applications and provides developers, architects, technical directors, heads of development teams in software development opportunities. The guest of honor and speaker event will be Brian Harry, vice president of Technology (Technical Fellow) with Microsoft, which will tell about the most current updates to Visual Studio 2010 and its benefits. Also at the conference speakers from Microsoft in Russia and representatives of companies have already begun to use new technology development.

Oracle today announced the release of an open database Berkeley DB 5.0, focused on efficient and reliable storage of data, reports RealCoding. Berkeley DB is performed directly in using this database applications (built into the application), allowing the program run faster on embedded systems, including PDAs and mobile devices. Starting with this release, the official announcement instead of the serial number version (5.0) now appears "Berkeley DB 11g Release 2. The main features of the new version is support for SQL API, enabling users to manipulate data, not only in the classical presentation of key/value, but also in the form compatible with SQLite. Attention is also worthy of the emergence of support organizations to access the database using the connectors that are compatible with standard JDBC and ODBC. Addition, a Berkeley DB adaptation for a mobile platform Android, moreover, this database can act as a transparent replacement database SQLite, the default for data warehousing in Android.

Great start Apple iPad

April 3 in the USA began selling "pre-big bang" tablet Apple iPad. The device is sold in company stores, as well as in most electronics stores Best Buy. Analysts estimate the company Piper Jaffray, for the first day it was sold from 600 to 700 thousand iPad - but this includes pre-orders. Directly through retail was sold just over 300 thousand devices.


First day

Journalists television sets on April 3 were reports from the flagship Apple Store on the 5 th Avenue in New York. There's a daily occurrence in sale iPad formed a queue of more than seven hundred people. For comparison: the premiere communicator iPhone 3G has collected approximately 540 customers. There must also be borne in mind that the first day of the sale came only "junior" Tablets of the line iPad - they are deprived of access to the 3G network and have the module GPS. But in any case referred to by the sales for the first day proved to be much lower than the latest estimates of analysts.

Today iPad is only available in the U.S. market. Only at the end of this month to begin formal delivery of the gadget in Australia, Canada, France, Germany, Italy, Japan, Spain, Switzerland and the UK. As for Russia, then it can begin selling planshetnika only in the IV quarter - and then if the "big three" mobile operators agree with Apple. But as the recent ugly history with sales of iPhone in Russia, it is quite difficult.


Buy advance

We can say that iPad is already fully paid for itself alone pre-sales through the Net. Admission pre-orders for iPad began in the U.S. on March 12 and April 3 to consumers had ordered hundreds of thousands of devices, although none of them have not even had this planshetnik in their hands. Let me remind you that the price iPad - $499 for a model with 16 GB of memory, $599 - for 32-gigabyte model and $699 - for 64-gigabyte.

It is extremely important and makes the point that even before the sales planshetnika the App Store appeared more than 2300 applications for the iPad. That is, buyers, if I may say so, "is not left alone with a new gadget. However, the cost of applications for iPad was, on average, higher than that of applications for iPod touch and iPhone. However, software for these devices is also working on the iPad - as a result of the amount available for iPad applications exceeds 150 thousand.

And the sales iPad software obviously has become another channel for profits for "apple company". For the first few days of sales planshetnika his half-baked Apple owners have downloaded more than a million applications from App Store store and bought more than 250.000 e-books in store iBookstore. It is easy to calculate that the average user for a couple of days after purchase iPad downloaded one book and three annexes.


Prospects

Analysts forecast the company iSuppli, in the current year, Apple may sell up to 7.1 million Tablet PCs. The next year, according to the same projections, sales reached 14.4 million units, and in 2012 - already 20.1 million The readership of users will vary. Thus, sales in 2010 will be provided with the so-called early adopters - the so-called marketing people who buy the product the very first. But then sales will grow by ordinary users, which will attract the emergence of many new applications, improve (build) the functional and price reductions.

ISuppli analysts believe the following: "touchscreen - a new standard for user interfaces and form factor iPad is perfect for touchscreen. In this case Apple, apparently managed to create a device that is both limited in functionality, but has huge potential for further development. As a result, limiting the device will not play any role, if Apple will provide users with enough additional content.

But in any case, notice to iSuppli, Apple pretty much at risk, because iPad success depends largely on paid content. It is possible that it is for this reason, the iPad not support Flash - as when a Flash on the iPad would pour a stream of free content.


Autopsy showed

One of the first svezhekuplenny iPad raskurochili experts project iFixit - and immediately shared with the Internet community, information about the internal structure of the Tablet PC.

The first thing I noticed - this is the fact that the iPad has a powerful enough battery - its capacity to 5.5 times more battery capacity iPhone. In fact, the tablet is equipped with two batteries, connected in parallel. Their total capacity is 23.8 WHr. For comparison: the power of the battery iPhone - 4,51 WHr, the battery and the MacBook Air - 40 watt-hours. As a result, it turned out that the claimed battery life tablet up to 10 hours, but tests have shown that it is much more.

Going complete iPad Charger 10 W power can charge the battery plate for several hours. However, as illustrated by the first testers, when connected to a conventional PC via USB tablet will be charged very slowly, and even then only when it is inactive. And the only new "Poppies" allows you to charge the tablet, even working on it. "The Secret" is associated with a different voltage on the USB-port.

As for the built-in processor iPad Apple A4, which has been much talk long before the premiere of the tablet, then the guys from iFixit and dug in it. It was found that A4 is a PoP-solution (Package on Package) - that is, its logic circuits superimposed on each other, forming a kind of multi-storey "sandwich". Such layers of at least three, two of them - this is memory. The capacity of each layer of memory is 128 MB in total - 256 MB. Note that the same is present in the latest generation iPhone. As a direct manufacturer processor is the company Samsung.

In addition to the processor Apple A4, in iPad installed flash memory type NAND production and Toshiba videointerfeysnye I/O controller touch screen - chip Broadcom BCM5973. The most expensive component of the iPad - a touch IPS-display production LG Philips LED backlight.


Breaking and Adaptation

Engage burglary iPad not slow-known hacker group DevTeam. Its specialists quickly discovered the Internet Tablet is a vulnerability discovered earlier in the iPhone. It is about using dzheylbreka Spirit to run on the iPhone third-party programs are not permitted in the Apple Store. Programs run by Rutowsky rights obtained through a vulnerability in the browser MobileSafari.

The specialists were able to port the DevTeam jailbreak Spirit on iPad - resulted in an Rutowsky access with remote command execution. Now we can expect the emergence of automation dzheylbrekinga iPad, which will allow full access to the file system, but also implement the ability to install and run third-party programs.

But the Internet giant Google distinguished by the fact that even before the sales start iPad - April 2 - has launched a version of the mail service Gmail, specially adapted for the new Tablet PC. As stated in the official blog of Google, this "experimental Gmail user interface based on a version of HTML5, launched last year for the iPhone and devices based on Android. The new version of mail service was created specifically per 9.7-inch display iPad".

At the same time, according to representatives of Google, "Tablet" version of Gmail available to users of any Tablet PC that has a browser with support for HTML5.

Cheapest music online store in the USA.