firewalls for dummies

The progress of Web exchange technology not only optimizes the Web server, but also can be used to solve some problems caused by the current firewall. Although firewalls are highly efficient at preventing network intrusions and have become a key factor in submitting secure Web sites and services, all of these security is achieved at a high cost. In short, firewalls limit performance and scalability. Becaus

often use these NMAP commands to improve the security of network deployment. For example, I like to use this command to play games with security software such as firewalls. That is to say, I pretend to be an attacker to test whether these security systems can block my attacks or leave my traces in the security system logs. From another perspective, you may be able to discover security vulnerabilities in your enterprise. There are many similar options

A few years ago, vendors said they could provide a variety of security features (Including Intrusion Prevention System functions and application control) on a device. Then we saw the next generation of firewalls emerging.In the current market research on the next generation firewall (NGFW), experts said that not every NGFW provides the functions that every enterprise wants, and, in some cases, too many features may not be a good thing.Gartner, an IT a

Zabbix monitoring firewalls and switches are transmitted through the SNMP protocol for data and data analysis, which I will explain below with the Dell Firewall SonicWALL 3400 series and switch N4032. Since the Zabbix server is already installed, it is now only possible to install the SNMP protocol on the fire switch on the firewall and send the data as a client.(i) Monitoring firewallsFirst, log in to the firewall and locate the firewall's monitoring

There has always been a dream: if you can find some loopholes or bugs what a good ah! So all day in the computer blindly blind research, study what? Research on how to break through the firewall (I mean the firewall is a soft body of personal firewalls, hardware I also have no conditions.) Hey, you don't say, really did not white research, but also really to me found that most of the common firewall. This bug allows us to deceive the firewall to achie

Today, knowledgeable hackers can use the ports opened by the network firewall to cleverly bypass the monitoring of the network firewall and directly target the application. They have come up with complex attack methods that can bypass traditional network firewalls. According to expert statistics, currently, 70% of attacks occur at the application layer rather than the network layer. For such attacks, the protection effect of traditional network

FireWall for network security products) Firewalls were the first to adopt Internet security protection products. However, during the application process, it is found that firewall products based on network port protection and packet filtering protection technology cannot effectively intercept application security (inWeb Applications). However, the firewall product is still not out of the security market, on the contrary, because of its powerful data f

Comments: While the Internet brings us convenience, the drawbacks of the Internet are gradually revealed. Many people will be attacked intentionally or unintentionally when connected, as a result, the information stored on the computer is stolen or lost by intruders, so the firewall is particularly important. Next we will introduce the classification of the firewall. With the rapid development of the INTERNET, every household now has computers connected to the INTERNET. While the network brings

Firewalls and switches are still commonly used. So I studied how firewalls and switches implement Intranet/Internet isolation. Here I will share with you, hoping to help you. With the maturity and rapid development of network and Internet technologies, more and more enterprises and institutions have begun to set up networks to automate office work and share Internet information. However, security issues hav

Reprinted Source: http:// OS .51cto.com/art/201006/207036.htm According to foreign media reports, over time, more and more users began to rely on the Internet to work, learn, and entertain, which led to more and more Internet attacks, this makes users' computers face a lot of potential risks every day. To defend against these network threats, major security vendors have successively launched various types of firewalls. As the name suggests, a firewa

Deep Firewall logging This article will explain to you what you see in the Firewall log (log). Especially what those ports mean ... This article will explain to you what you see in the Firewall log (log). Especially those ports, what do you mean? You will be able to use this information to make a judgment: Have I been attacked by hacker? What does he/she want to do? This article applies both to security experts who maintain an enterprise-class firewall and to home users who use personal

Not long ago, I summarized the current "ten free anti-virus software ". In general, free anti-virus software does not have a firewall. Therefore, we are specially searching and collecting popular firewalls to facilitate the use of free anti-virus software. Free anti-virus software + free firewall = Internet set, which is better than paid anti-virus software that downloads the cracked version. Download the cracked version, accidentally step on a mine,

With the rapid development of the Internet, now every household has a computer and is connected to the network, in the network to bring us convenience at the same time, the drawbacks of the internet also slowly exposed, many people in the network will be intentional or unintentional attacks, which led to their own stored on the computer data by intruders stolen or lost, So the firewall is particularly important, the following for you to introduce the classification of

Firewall English name is firewall, refers to the computer and its connected network between the hardware or software, can also be located between two or more networks, such as the LAN and the Internet, all the data flow between the network through the firewall (see figure). Firewalls allow you to scan communications between networks, turn off unsafe ports, prevent external Dos attacks, and block Trojan horses, to secure your network and your computer.

Firewall has become a key component in the construction of enterprise network. But there are a lot of users, that the network has a router, you can achieve some simple packet filtering function, so why use a firewall? The following is a comparison of the security aspects of the Neteye firewall and the most representative Cisco routers in the industry to explain why there are routers in the user network and firewalls are needed. The background of the

Firewall English name is firewall, refers to the computer and its connected network between the hardware or software, can also be located between two or more networks, such as the LAN and the Internet, all the data flow between the network through the firewall (see figure). Firewalls allow you to scan communications between networks, turn off unsafe ports, prevent external Dos attacks, and block Trojan horses, to secure your network and your computer.

Firewall has become a key part of enterprise network construction. However, many users think that there are already routers in the network and some simple packet filtering functions can be implemented. So why should we use firewalls? The following is a security comparison between the NetEye firewall and the most widely used and representative Cisco router in the industry. We will explain why a user's network includes a router and a firewall. One or tw

Iptables implements network firewalls: SNAT, DNAT, and iptablessnatIptables network firewall (2)-Introduction to SNAT and DNAT ?? In the previous article, we briefly introduced the basic concepts of the firewall in the LINUX kernel, as well as the four-table-five-chain knowledge. For more information, see Introduction to the LINUX firewall. It also introduces how to set up a simple network firewall that can filter protocols and ports in a Linux enviro

The Cisco router has a very high market demand. Here we mainly introduce the background of Cisco router and firewall. Firewall has become a key part of enterprise network construction. However, many users think that Cisco routers already exist in the network and some simple packet filtering functions can be implemented. So why should we use firewalls? The following is a security comparison between the NetEye firewall and the most widely used and repre