Copyright NOTICE: This content is original content, reprint please declare source.Original address: Http://www.excelib.com/article/286/showTo really use a live firewall, the first need to understand what the firewall is, what role, only in this way can be used handy, but because of historical reasons, now the general understanding of the firewall concept has a ce
1. Iptables configuration file ¶
The default configuration file in the Rhel/centos/fedora Linux distribution is:
The/etc/sysconfig/iptables– system execution script activates the firewall function by reading the file.2. Basic operations: displaying default rules ¶
In the Command Line window, enter the following directive:
Iptables--line-numbers-n-LWhere the –line-numbers parameter is preceded by a number in front of each line rule, and-n represent
Recent projects have encountered a firewall load balancing needs, take out and discuss with you.
Users in the project procurement of 4 domestic well-known brands of high-end firewall, originally intended to use the firewall itself cluster way to achieve the firewall load sharing and redundant deployment, but the
With the development of the communication industry, Web switches are gradually improving their functions and features, and have become an indispensable part of networking. The progress of Web switch technology not only optimizes Web servers, it can also be used to solve some problems caused by the current firewall.
Although firewalls are highly efficient in preventing network intrusion and have become a key factor in submitting Secure Web sites and se
We all know that every new product or technology must be accepted by users and used by users. It must also meet users' needs. The same applies to smart switches. Virtual Storage Technology is undoubtedly a hot technology in recent years. In addition
I am reading Apple's 2012 WWDC, and I have read it in half. I want to write out my most practical feelings.
First of all, this Conference may not be inferior to the previous one, because I have never seen it before. At that time, there was still a
Author: closeallSource: http://blog.csdn.net/closeall2008Disclaimer: This article may be reproduced or reproduced without the consent of the author. However, please keep the author, source, and declaration of any reference to this article. Thank you.
Question)Cocos2d-x seems very good, but its different versions of the difference, compatibility makes people helpless, its websocket under the WP problem, SQLite problem seems to have been erased, U3D seems good, development Frame-frame debugging is
SPI Labs security researchers warned iPhone users not to use a special feature to use the iPhone's Safari browser to call phone numbers over the Web.
This feature is intended to provide iPhone users with an easy way to dial phone numbers displayed
Article title: a Wi-Fi monitoring tool for Linux is released by a foreign manufacturer. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded
Recently, SPAM websites have been punished by Google's hard-hand tactics. Due to the rapid and strong action of Google, the SPAM website has been widely used, and countless innocent websites have been involved.In addition to Google, other domestic
RTU, as a remote logical control unit after PLC, has been gradually recognized by the industry with its outstanding performance in wide area applications, at the same time, it has also attracted a group of prospective and strategic automation
SDK
· Nokia
Nokia is worthy of being the leader in the mobile phone industry. It also provides first-class support for j2's. There are specialized websites that provide sdks and various documentation.
Web site: http://forum.nokia.com.cn/sch/index.
With the continuous development of radio and television networks, we have established a variety of portal websites with unique radio and television features, but the network security issues that follow have also become increasingly concerned by us, to ensure the secure and normal operation of websites, network administrators use network products such as firewalls and routers for security protection. These objectively play a role in preventing "external" attacks and intrusions, however, this trad
Linux Beginner-firewall articleFirewalld is a firewall of another program, and iptables the same, but the use of more than iptables simple point, do not need to know 3 tables and 5 chains can also be used.1. Basic commands of Firewall"Firewall-cmd--list-all". View information and configuration for the current
With the rapid development of computer network technology, network security issues have become increasingly prominent in the face of various users. According to the data obtained by the author, nearly 20% of users on the Internet have suffered from hackers. Although hackers are so rampant, the network security problem has not yet attracted enough attention. More users think that the network security problem is far from their own, this is evidenced by the fact that more than 40% of users, especia
How to correctly test and maintain the firewall?Eric Cole, a technical expert in this article, describes how to solve the problem of low firewall performance and fault through proper maintenance and testing. Most enterprises think that firewall is a mature technology, and usually security experts do not think too much about it. When auditing or evaluating a
The advancement of Web exchange technology not only optimizes Web servers, but also can be used to solve some problems caused by the current firewall.Although firewalls are highly efficient in preventing network intrusion and have become a key factor in submitting Secure Web sites and services, all these security measures are achieved at a high cost. In short, the firewall limits performance and scalability. Because the
Firewall Architecture
1. ScreeningRouter)
The shielded router can be implemented by a dedicated manufacturer or a host. Shield the router as the only channel for internal and external connections. All packets must pass the check here. The IP layer-based packet filtering software can be installed on the router to implement packet filtering. Many routers have packet filtering configuration options, but they are generally relatively simple. The danger of
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