bro network security monitor

normal network activities, concealment strong; C. The means of intrusion are more covert and complex. There are several types of threats facing the open environment of computer network system: (a) deception (masquerade); b) Replay (c) Message modification (modification of messages); d) Denial of service (deny); E Trap Gate (trapdoor); f) Trojan Horse (Trojan Horse), g) attack such as Turner Attack (tunne

network interface box, which is sometimes located outside the house or office, then, a listening device is placed on the box to continuously monitor the telephone call content.Possible VoIP eavesdropping usually follows the same process, but different tools are used. The first requirement is to be able to access the media that carries voice calls. This may be achieved by intruding into a VoIP Phone, a work

visit appropriately, the permissions such as monitor, system, and manage allow your security work to be easily handled. in actual application, the classification of these passwords greatly improves the security of the Core routing switch device. (4) In addition, there is still a major problem in password management, that is, the handling of temporary passwords.

voice and data in priority. VLAN Division also helps defend against fraud, DoS attacks, eavesdropping, hijacking, and communication. VLAN Division allows a user's computer to form an effective closed circle. It does not allow any other computer to access its devices, thus avoiding computer attacks and making the VoIP network quite secure; even if you are attacked, the loss will be minimized. 2. monitor and

This article describes in detail the basic introduction to the access security of CISCO Router network devices, and introduces basic security logon, terminal protection, authorization, and other issues, I believe that reading this article will help you. To protect their Cisco networks, many administrators are busy with what traffic can be allowed to pass through

can easily bypass the configuration of the corporate firewall. Skype uses 80 and 443 ports, and most firewalls open these ports to allow browsing of the network. In addition, Skype will change the transmission route if the assigned port is not available when the Skype is installed. As a result, Skype's ports can be changed according to demand, making it harder to block Skype with firewalls. Skype also uses a unique AES 256-bit key for each communicat

To protect their Cisco networks, many administrators are busy with what traffic can be allowed to pass through network devices, and how to restrict the unique information exchanged between mail route upgrades and other routers. The access control list (ACLs) usually solves these problems quite simply. The security of network devices is important to any networked

With the increasing popularity of the Internet and the importance of national education, most colleges and universities have established Campus Networks, which not only improves the educational level, but also opens a window for students to understand the world. However, the security issues that follow have brought unprecedented challenges to the campus network. On the one hand, insecure factors such as mal

helps determine whether an accessible device has adequate protection against exposing vulnerabilities after the device is deployed. Nmap is a free open source security Scanning tool that can be used to monitor the network; This tool supports a wide variety of switches to discover open ports, services, and operating systems. Deploying IDs and IPs is another way

servers. How to avoid malicious attacks on network servers. (1) Build your hardware security defense system Select a set of security system models. A complete set of security models should include the following necessary components: Firewall, intrusion detection system, and routing system. The firewall plays a

the gray icon to manage the network speed and kill all unfamiliar devices. In addition, you can limit the speed of devices such as mobile phones and tablets that do not watch videos to ensure that your network is reachable. In addition, rising route security guard can monitor the latest devices connected to Wi-Fi in r

(or marketing materials) are used for security? Is Security something dispensable, or is it part of the solution architecture? Does this solution not require security protection in the firewall? Too many products think that there is no Internet-oriented system to enjoy magic-like security protection. For combined SD

organizations to implement fine-grained access control, but also can test audit and other report requirements that have been implemented. In the current mobile world, users from multiple locations and devices may appear anywhere on the company's network at any time. As a result, some static defined source and target IP addresses-Based on firewall policies-are no longer accurate. By activating the NAC firewall policy, you do not need to rely on the st

There is a large amount of help information on the Internet, telling you how to protect your computer from remote intrusion and malicious mobile code infection, in addition, this topic is often the focus of many formal IT security education and training courses. If you take this into consideration, it is not difficult to physically prevent the computer from being stolen. However, for security protection, it

When it comes to the security of wireless networks, people pay more attention to encrypting data, authenticating users, restricting access, and detecting deceptive access points. However, as network and link defenses improve, hackers have begun to update attacks, especially for wireless clients, such as PDA devices, laptops, handheld devices, and so on, because these devices have little or no safety precaut

IOS security-network packet analysis tool Charles I wrote an article earlier: IOS development-image search (source code + resolution) Many of my friends are curious about how I got Baidu's image search API, which is actually very simple. The network packet analysis tool "Charles" can be easily implemented. To obtain the image search API, you only need to perform

"The enemy, the Baizhanbudai, the unknown and the bosom friend, one wins a loss, does not know, does not have the bosom friend, every war will be dangerous." "Grandson (ancient Chinese military strategist)."The words of the grandson can still resonate with us today.Organizations can gain a foothold in the ongoing cyber-security battle only by understanding their enemies and their strengths and weaknesses. Do not raise awareness of the importance of

personal privacy information. This will also become the focus of future prevention. 4. Junk Mail Makeover From the current point of view, the total amount of spam, although a downward trend, but its escape technology is more and more strong. This kind of mail carries a large number of viruses, Phishing, worms, trojans and additional risks. Ventilation six strokes. People often think that as long as the installation of some Simple network defense prod

Linux must learn 60 commands (5)-Network securitySubmitted by Zhanjun in Thursday, 2006-04-13 12:42 Linux must learn 60 commands: System security-related commandsLinux must learn system security commands (1)Author: Cao Yuan its dispatch time: 2004.12.03Although Linux is a multi-user system like the Windows nt/2000 system, there are a number of important differenc

1. IntroductionWith the widespread popularity of wireless networks, people are increasingly using wireless networks, he changed the way people live. Now a lot of people go to a place, the first thing to ask is "Is there WiFi?" However, the wireless network security problem has not aroused people's attention enough. In some public places, such as airports, train stations, cafes, restaurants, and so on, some