With the Internet and computer technology, networking has become a business operation and an integral part of personal life, but the threat of network security and growing, network worms, hacker attacks, all the time does not threaten our network system in particular the security vulnerabilities caused by security incidents escalated from Codered, Nimda to Blaster, similar to the spread of the virus through the network vulnerabilities, attacks against the vulnerability caused us great damage, so the traditional network security measures pale and powerless, The majority of users are often after the outbreak of the virus after the emergence of security incidents or thought to make up for vulnerabilities, but has been unable to make up for lost time. Zhaohua software is the understanding of this problem, the idea for hackers to develop a Zarva vulnerability scanning systems, security event occurs before the loopholes that may detect problems, make up and evaluation.

WLAN technologies are IEEE 802.11 standards working group from the outset as a key security topics. The original IEEE 802.11-1999 protocol mechanisms defined WEP (WEP was intended "as a safety cable"), there are many defects, so IEEE 802.11 in 2002, quickly established the 802.11i working group proposed AES-CCM and other security mechanisms. In addition, China National Standards Institute and the 802.11i standard for 802.11 less than on the existing WLAN security standards has been improved, the development of the WAPI standard.

City hot ARP firewall is used Dr.COM 2033/2133 billing platform for users to provide further protection and ARP inspection module, can help the user to completely clear the ARP virus.

There are many wireless LAN security method, but in the end which is more suitable for the user where the local area network, local area network is fully effective response to attacks on 802.11 and 802.1x, which requires its own wireless LAN according to the situation, take a different approach. Wireless LAN applications have become increasingly popular, but the wireless LAN security, but has always been one of the factors constraining development of the industry, but also the trade debate. This article will introduce you to the wireless LAN vulnerabilities and how to eliminate these potential threats, but also explain how you assess the vulnerability of wireless local area network and manage their risk.

The first case is intended to extort money from the infected user Trojan was intercepted yesterday, the National Virus Emergency Response Center, said the new Trojan horse program "blackmailer" (Trojan_Agent.BQ), will hide a malicious user documentation, and restoration of data by extortion money to the user name.

A while ago, QNO technology for the "ARP virus control program" for a brief introduction, by the majority of users and the industry's attention and praise. Recently, QNO technical engineers working in science and technology has been a new discovery, to further enable us to know and control ARP, ARP attack special launch control advanced articles, and users to discuss and research.

Firewall (Firewall) is a trusted network and untrusted network security barrier between the software or hardware. Linux operating system kernel with the packet filtering capability, the system administrator through the management tool set to a set of rules you can build a Linux-based firewall filtering rules with this group is host to receive and send packages or host forwarding from one network card to another card package, without extra funds to purchase specialized firewall products, more applicable to certain small and medium enterprises or departmental users.

Oracle security research organization - Red Database Security Co., Ltd., in Oracle's Metalink Knowledge Base to search for records of 42 bugs, some even serious. They concluded that this allows hackers to use a similar "Google attack" approach to search for a loophole in the database, Oracle sensitive information, such as your e-mail, database configuration, test cases and so on.

Hot real estate market for many real estate classes soaring site visits, but these sites are exposed on the security of a serious problem.360 Security Center monitoring data show a malicious web site: Only one day on August 18 was "horse hung" there are 12 real estate Web site, is "hanging horse" amounting to hundreds of pages.In the past three months, has Vanke, Golden Group, SouFun and other real estate website has been nearly a hundred hackers and "horse hung" as the Trojans spread online passive "drug source."

Vulnerability scanning is essential to ensure system and network security means Linux systems This article describes how to use the free remote security scanner Nessus for vulnerability scanning.

Yesterday, 360 Safety Center issued an urgent safety warning that the red, with the Microsoft MPEG-2 video for analysis modules 0day vulnerabilities of large scale network attacks have erupted.Less than 20 hours, hackers have been using this loophole to 7740 Web site into a "drug source."

Firewall (Firewall) is in a trusted network and untrusted network security barrier established between software or hardware.Linux operating system kernel with the packet filtering capability, the system administrator through the management tool set to a set of rules can create a Linux-based firewall filtering with this set of rules by the host to receive and send packets from a network card or host adapter forwarded to anotherThe package, with a spare PC can replace expensive dedicated hardware firewall, for some small and medium-level users or departments, it is worth considering.

In today's networks, the Internet's preferred task is to Hacking. The results basically fall into two, one is hacking in our three-dimensional tight defense in the loss of soldiers off to; the other is to hack into our system, then what it changed anything for us? Do what result? Experienced network administrator can tell through the log files clues, collect and secure evidence of the intrusion (eg, related to IP addresses, login account and other information).

June 2, Ministry of Public Security released news that lead to "5.19" case of the South 6 provinces off net 4 suspects arrested by public security organs.The four suspects is often said that hackers.

L2-L4 layer filter

Most of the new switch is now to establish rules by means of various filters to achieve the demand.Rule set has two modes, one is MAC mode, the source according to user needs based on valid MAC or destination MAC for data isolation, the other is the IP model, can be the source IP, the purpose IP, protocol, source application port andObjective port filtering data packets; establish good rules must be attached to the corresponding Di receive or transmit port Shang, Ze when the switch this port to receive or forward data O'clock, Gen Ju Lai filter packet filtering rules, Jueding yes Zhuanfahuanshi discarded.In addition, the switch via hardware "logic and non-gate" to the filtering rules of logic operation, determined to achieve filtering rules, and not affect the data forwarding rate.

Terminator LAN, network magistrates, network attacks Scissorhands principle

We know that a LAN can not simultaneously have two of the same ip.Otherwise, conflicts will occur, the result must be one of a machine can not access.Suppose there are two in a local area network hosts A and B, host A knows B's IP and not only know the MAC, and host B. Host A would like to communicate, in accordance with OSI seven layer model, when the data package to the data link layertime (ie MAC layer), will all the machines to the LAN to send an arp request packet (small knowledge: arp is the Address Resolution Protocol, it is meant to IP addresses converted to the corresponding MAC address, then if B receivedto the request packet will be returned to the A 1 arp response packet, to tell their own MAC A, 2 so that you can continue the data transfer. But if in the process, if the host sends ARP request for a time in the local area networkThere are a host of IP and a similar C, C will be informed that there are a host of IP addresses the same with their own IP addresses, in a pop-up when we normally see a dialog box IP conflict. As a host to receivethe same with their own IP to send the ARP request will pop up a box to IP conflicts, if any fake IP to the LAN hosts sends ARP requests constantly, while their own MAC is forgery, then the host will be forged IPIP conflict will constantly receive tips. This will constitute a LAN Terminator attacks principle. From the above analysis point of view, this fact is a kind of arp request packets denial of service attack.

6970 RealAudio

RealAudio client from the server's UDP ports 6970-7170 to receive audio data stream. This is controlled by the TCP7070 port outgoing connection settings.

Met several times at work within the network ARP. Is to find methods which make the following analysis:

March 10 to 14, a lecture entitled "Cyber Storm - Ⅱ" network warfare exercise held in the U.S..18 federal agencies, 40 companies and four allies to participate in the exercise held in the United States, 9 states, called an unprecedented scale.

Internet web site plethora hacker, hacker software, more and more, more and more black.I now these different categories hacking software exposed to public light, and the corresponding solutions to take preventive measures.

Research Branch, Shenzhen Software Technology Co., Ltd. is a professional enterprises engaged in supervision and management of communications hardware and software R & D units, with the overall quality of a group of high technology, marketing and other talents, has hosted many large-scale project development engineer, accumulationa wealth of practical experience of systems analysts, versed in a variety of development tools Kaifa staff, familiar with the network of knowledge, design and maintenance of network management personnel, engaged in marketing, consulting, training and business management management consultant, have engaged in enterprise information constructionunique means of implementation.

1 Introduction

Hainan, China Railcom, China Railcom's office is a branch, established in December 26, 2001.As a new major telecom operator, CTT's business scope is consistent with the current China Telecom, including Internet services, local telephone, long-distance telephone services, broadband backbone network information services and many other telecommunications services.

EMC today announced Documentum Records Manager (Records Management) 5.3 version with Information Rights Management (IRM) Services packaged together for sale to help companies to share content and content security protection.

First half of 2009, computer virus, Trojan horse mode of transmission linked to the main page. Hang horse, Microsoft and other applications, mainly through third-party software vulnerabilities generally targeting. According to Jiangmin Anti-Virus Center, Trojan communicators used by third-party applications, Microsoft has loopholes and flaws, has basically reached the proportion of each half.

When hacking a host, will find ways to protect their own "fruits of labor", so it will leave all the back door of the broiler to time to control the chicken, which is the most used accounts hiding.In the broiler to create a hidden account to prepare for use when needed.Account hiding is most hidden back door, the system generally difficult to find hidden user accounts exist, so much harm, this article on the hidden accounts that hackers commonly used techniques revealed inside story.