Knowing the enemy with VLAN technology defense hacker attacks (1)

Why use a VLAN? The implementation of VLAN is a logical division of users, so that users in different VLANs can not communicate directly. This technology facilitates implementation and saves money. However, with the application of VLAN more and more wide, and VLAN-related security management problems are more and more serious. The application of VLAN technology provides a strategy method based on management mode for network security, we can choose different VLAN partition methods according to the characteristics of enterprise network management. Although the network security to a certain extent has been guaranteed, but ...

The core of the network has a full understanding of the switch vulnerabilities

The IDC report shows that the switch market has maintained a high growth momentum in recent years, and the market is expected to reach $1.51 billion by 2009. Switch in the enterprise network occupies an important position, is usually the core of the entire network, this position makes it become the focus of hacker intrusion and virus rampant, in order to protect their own network security, enterprises need to have a full understanding of the switch vulnerabilities on the local area network. The following are five ways to exploit the switch vulnerabilities. VLAN jump attack virtual local area network (VLAN) is a method to segment broadcast domain. VLANs are also often used for web ...

Wireless security: Making OpenSSH a secure Web server

In some ways, securing your computer is a full-time job. The problem is even more complicated when you think about wireless security. For those traveling outside the wireless network, whether they use a wireless access point in a café, an airport, or a hotel where they spend the night, one important concern is that they never know the security of the network they use unless they know it is not. For example, for a network of coffee shops, this is true: because they are open to everyone, you can't finish ...

What new threats are you facing? PC Security Ultimate Guide (1)

The use of computers is becoming an adventure because the data we store and deliver on our computers, personal privacy, trade secrets, and so on are being increasingly threatened and the internet is no longer secure. Today, traditional viruses and junk mail have new accomplices-more dangerous spyware and adware. In addition, there are now "identity" thieves, who invade important databases to steal user personal information. Most seriously, organized crime has emerged in the internet world. In this article, we will describe the new threats to the computer users above and tell you how to take risks. In addition ...

Top ten tips for ADSL routers to prevent hacker attacks

At present, the use of ADSL users more and more, because ADSL users online long, fast, so hackers are targeted. Now there are a variety of more and more detailed "IP address library", to know some ADSL users of the IP is very easy things. How to defend your network security? Consider the following methods. One, unhide folders if you use the Windows 2000/XP system, right click on the C disk or other disk, choose "Sharing", you will be surprised to find that it has been set to "total ..."

Full application of behavioral analysis (NBA) tools

The NBA is another security model, not only to meet compliance requirements, but also to be part of an enterprise's deep defense architecture. Brandon Greenwood is the network operation and security manager of Utah State, a Xango company that produces nutritional additives. He thinks the NBA is another security model. For them, adopting the NBA is not just about implementing a compliance program, but also a best practice as part of a defense-in-depth architecture. Xango chose the Sourcefire Company's NBA to help protect the spread of the whole ...

Efficient security maintenance LAN experience sharing

1. When there is a failure to check the network card first in the LAN, the phenomenon of internet is often occurring, once encountered such a problem, we should first carefully check the network of the machine, network card settings are normal. When checking, we can open the Control Panel/System/device Management/Network adapter Setup window in turn by using the mouse. Check for interrupts and I/O address conflicts in this window (it is better to set the interrupts for each machine to be the same for comparison) until "This device is working properly" in the properties of the network adapter. And in the "Network Neighborhood" can at least find ...

VoIP through NAT and firewall methods

First, Nat/alg way ordinary NAT is to modify the UDP or TCP message header address information to achieve address conversion, but for VoIP applications, in the UDP net load also need to take address information, ALG means that in the private network of VoIP terminals in the net load to fill in the private network address, This address information is modified to an external address on Nat via Nat. The recognition of voice and video protocols (H323, SIP, mgcp/h248) and the control of Nat/firewall, and each additional new application will require ...

Encryption technology can effectively prevent message information from being compromised

The wide use of open-mail open source technology enables hackers to crack digital signatures and get mail content. The problem is how to protect your e-mail messages from being compromised through the GNU Privacy Guardian. If GPG (GPG is a set of toolset for secure communication and data storage that can be encrypted and digitally signed) is not properly used, it is not possible to obtain security recognition from the information. It is entirely possible to insert additional information before and after the data is encrypted, and it is safe to mistake the user for the data. Using cryptographic techniques to authenticate or encrypt e-mail messages is quite dangerous. ...

Layer fortification protects VoIP security against wall-ear intrusion

Even today, VoIP technology is widely used, security is still repeatedly questioned. Peter Cox, a British security expert and founder of the firewall company Borderware, announced recently that VoIP phones based on the internet are extremely insecure and easy for hackers to exploit. To substantiate this view, he developed a "proof-of-concept" (proof-of-concept) software siptap that could eavesdrop on VoIP Internet telephony. The software utilizes a Trojan horse software installed on the corporate network to successfully access the VoIP network ...

PCAnywhere a good helper for remote computer control (1)

The author of the enterprise in the country has offices, daily work in the computer will inevitably have such or such problems arise, because the office does not maintain the computer professionals, so every time there are problems will call for assistance. With pcanywhere remote control software, you can easily control remote computers on the local computer, software maintenance, upgrades and troubleshooting operations, not only to save the trip to the scene, but also for enterprises to save a large amount of service funds, really kill both birds. The collaboration between the two computers, pcanywhere in which the role can be ...

Defending vulnerable territory. E-mail Skills for enterprise users

Although the use of e-mail is almost universal, not everyone knows how to use it correctly. The following instructions will cover mail viruses, spam, phishing protection, messaging etiquette, and how to handle attachments. These can help you defend your business interests and help your users learn how to operate your messages securely and reliably. Nowadays, e-mail is an indispensable tool in people's work. But many users do not use it correctly, they rush to security vulnerabilities, take up too much bandwidth, and even make mail etiquette more unconstrained. Here to give some base ...

Security threat analysis and prevention methods for broadband account (1)

Broadband users should improve the awareness of network security, and take measures such as strengthening system, restricting open ports, shutting down sharing and so on, so as to prevent hackers from hacking into computers, reducing or avoiding the economic loss caused by embezzlement of accounts. 1. The development of broadband has brought the convenience of information communication to people, but it has also produced some problems. Nearly a period of time, many Chinese telecom ADSL broadband users without knowledge, without the protection of the situation, the account was stolen after the QQ currency value, play Shanda online games and other consumption of things happen. The author is ADSL broadband ...

How to protect against VoIP security vulnerabilities

VoIP has a lot of security risks, face a lot of security threats, but this is not to say that the security of VoIP is hopeless, in fact, with the frequent occurrence of security incidents, many VoIP manufacturers also in the continuous practice of accumulating experience, through a number of measures to a greater extent to ensure the security of VoIP. But to improve VoIP security to the two-pronged approach, in addition to VoIP vendors to abandon VoIP security is an additional product concept, the security technology is embedded in the VoIP product itself; For VoIP users, to fully realize that VoIP equipment safety straight ...

How to remove email virus "Tianlong Nine"

Choose a reliable anti-virus software. In order to deal with the mail virus, it is very effective to scan and filter the harmful virus during the process of receiving mail. Users can use the antivirus software in the mail monitoring function to implement, set up the message monitoring function, can receive the message in the process of virus processing, effectively prevent the intrusion of the mail virus first, select a reliable anti-virus software to deal with the mail virus, Virus scanning in the process of receiving mail is a very effective means of filtering harmful viruses. Users can use antivirus software in the message monitoring function to implement, set up the message monitoring function ...

How to set up secure switch system in switch security technology

The switch occupies an important position in the enterprise network, which is usually the core of the whole network. In this era of hacker intrusion and virus-ridden network, as the core of the switch is also taken for granted a part of the responsibility of network security. Therefore, the switch must have the professional security product performance, the security has become the network construction must consider the heavy middle. As a result of security switches, the integration of security certification in the switch, ACLs (Access control list), firewall, intrusion detection and even anti-virus functions, the security of the network really need ...

MRTG Background monitoring network flow strategy (1)

MRTG (Multi Router traffic Grapher) is a monitoring network traffic load of free software, for many network administrators, MRTG is an essential network management tool. MRTG is the use of SNMP protocol to query the designated SNMP protocol equipment, regular statistics of its equipment flow or load, and then the statistical results of the statistical map, from the statistical map can be very intuitive to detect traffic or load (Figure 1). In this way, the network administrator can easily find the Internet bandwidth consumption of abnormal conditions, such as the virus to send a large number of packets ...

Teach you a few tricks how to effectively prevent the intrusion of mail virus

e-mail to the Internet, it is so difficult to leave, but, the virus, this hateful fellow, put on the cloak of email, so rampant, so we have a hint of the lovely email doubts: she is still cute still? Now I tell you, In fact, we can distinguish our email. The first recruit: software to help select a reliable anti-virus software. In order to deal with the mail virus, it is very effective to scan and filter the message in the process of receiving mail. We can use the antivirus software in the mail monitoring function to achieve ...

Interrupt PhpBB Forum spam Publishers harassment

phpBB is the most popular software product for online forums. As people who distribute spam increasingly feel that forums are the perfect soil for them to distribute business information, how to maintain the integrity of their forums has become the most vexing problem for phpBB administrators. I'll list the responses in alphabetical order below, and highlight those with additional features and the ones I've applied. Because of the update of the scheme, it is obviously unwise to give the link directly, I will replace it with the official page. Intercepting people registered with a public agent the main function of this measure is to intercept ...

The most basic security technology in the network: Data encryption technology

Data encryption is one of the key technologies to realize network security, this paper first introduces the basic concept of encryption, then focuses on two kinds of the most common encryption technology: private key encryption and public key encryption, and detailed discussion of their characteristics, development and future research direction. Because of the rapid development of Internet, the security of encryption algorithm is paid more and more attention by people. Faced with the potential threat and attack of computer network, a computer network security manager should build a powerful and safe protection means for the network that he has jurisdiction over, which can be done through the following six security levels: patching ...

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