哪里有关于网络安全的英文网站呢

google里输入Network Security，到处是

专业的站点：

This document gives home users an overview of the security risks and countermeasures associated with Internet connectivity, especially in the context of “always-on” or broadband access services (such as cable modems and DSL). However, much of the content is also relevant to traditional dial-up users (users who connect to the Internet using a modem).

Computer security

What is computer security?

Computer security is the process of preventing and detecting unauthorized use of your computer. Prevention measures help you to stop unauthorized users (also known as "intruders") from accessing any part of your computer system. Detection helps you to determine whether or not someone attempted to break into your system, if they were successful, and what they may have done.

Why should I care about computer security?

We use computers for everything from banking and investing to shopping and communicating with others through email or chat programs. Although you may not consider your communications "top secret," you probably do not want strangers reading your email, using your computer to attack other systems, sending forged email from your computer, or examining personal information stored on your computer (such as financial statements).

Who would want to break into my computer at home?

Intruders (also referred to as hackers, attackers, or crackers) may not care about your identity. Often they want to gain control of your computer so they can use it to launch attacks on other computer systems.

Having control of your computer gives them the ability to hide their true location as they launch attacks, often against high-profile computer systems such as government or financial systems. Even if you have a computer connected to the Internet only to play the latest games or to send email to friends and family, your computer may be a target.

Intruders may be able to watch all your actions on the computer, or cause damage to your computer by reformatting your hard drive or changing your data.

How easy is it to break into my computer?

Unfortunately, intruders are always discovering new vulnerabilities (informally called "holes") to exploit in computer software. The complexity of software makes it increasingly difficult to thoroughly test the security of computer systems.

When holes are discovered, computer vendors will usually develop patches to address the problem(s). However, it is up to you, the user, to obtain and install the patches, or correctly configure the software to operate more securely. Most of the incident reports of computer break-ins received at the CERT/CC could have been prevented if system administrators and users kept their computers up-to-date with patches and security fixes.

Also, some software applications have default settings that allow other users to access your computer unless you change the settings to be more secure. Examples include chat programs that let outsiders execute commands on your computer or web browsers that could allow someone to place harmful programs on your computer that run when you click on them.

Technology

This section provides a basic introduction to the technologies that underlie the Internet. It was written with the novice end-user in mind and is not intended to be a comprehensive survey of all Internet-based technologies. Subsections provide a short overview of each topic. This section is a basic primer on the relevant technologies. For those who desire a deeper understanding of the concepts covered here, we include links to additional information.

What does broadband mean?

"Broadband" is the general term used to refer to high-speed network connections. In this context, Internet connections via cable modem and Digital Subscriber Line (DSL) are frequently referred to as broadband Internet connections. "Bandwidth" is the term used to describe the relative speed of a network connection -- for example, most current dial-up modems can support a bandwidth of 56 kbps (thousand bits per second). There is no set bandwidth threshold required for a connection to be referred to as "broadband", but it is typical for connections in excess of 1 Megabit per second (Mbps) to be so named.

What is cable modem access?

A cable modem allows a single computer (or network of computers) to connect to the Internet via the cable TV network. The cable modem usually has an Ethernet LAN (Local Area Network) connection to the computer, and is capable of speeds in excess of 5 Mbps.

Typical speeds tend to be lower than the maximum, however, since cable providers turn entire neighborhoods into LANs which share the same bandwidth. Because of this "shared-medium" topology, cable modem users may experience somewhat slower network access during periods of peak demand, and may be more susceptible to risks such as packet sniffing and unprotected windows shares than users with other types of connectivity. (See the "Computer security risks to home users" section of this document.)

What is DSL access?

Digital Subscriber Line (DSL) Internet connectivity, unlike cable modem-based service, provides the user with dedicated bandwidth. However, the maximum bandwidth available to DSL users is usually lower than the maximum cable modem rate because of differences in their respective network technologies. Also, the "dedicated bandwidth" is only dedicated between your home and the DSL provider's central office -- the providers offer little or no guarantee of bandwidth all the way across the Internet.

DSL access is not as susceptible to packet sniffing as cable modem access, but many of the other security risks we'll cover apply to both DSL and cable modem access. (See the "Computer security risks to home users" section of this document.)

How are broadband services different from traditional dial-up services?

Traditional dial-up Internet services are sometimes referred to as "dial-on-demand" services. That is, your computer only connects to the Internet when it has something to send, such as email or a request to load a web page. Once there is no more data to be sent, or after a certain amount of idle time, the computer disconnects the call. Also, in most cases each call connects to a pool of modems at the ISP, and since the modem IP addresses are dynamically assigned, your computer is usually assigned a different IP address on each call. As a result, it is more difficult (not impossible, just difficult) for an attacker to take advantage of vulnerable network services to take control of your computer.

Broadband services are referred to as "always-on" services because there is no call setup when your computer has something to send. The computer is always on the network, ready to send or receive data through its network interface card (NIC). Since the connection is always up, your computer’s IP address will change less frequently (if at all), thus making it more of a fixed target for attack.

What’s more, many broadband service providers use well-known IP addresses for home users. So while an attacker may not be able to single out your specific computer as belonging to you, they may at least be able to know that your service providers’ broadband customers are within a certain address range, thereby making your computer a more likely target than it might have been otherwise.

The table below shows a brief comparison of traditional dial-up and broadband services.

Dial-up Broadband

Connection type Dial on demand Always on

IP address Changes on each call Static or infrequently changing

Relative connection speed Low High

Remote control potential Computer must be dialed in to control remotely Computer is always connected, so remote control can occur anytime

ISP-provided security Little or none Little or none

Table 1: Comparison of Dial-up and Broadband Services

How is broadband access different from the network I use at work?

Corporate and government networks are typically protected by many layers of security, ranging from network firewalls to encryption. In addition, they usually have support staff who maintain the security and availability of these network connections.

Although your ISP is responsible for maintaining the services they provide to you, you probably won’t have dedicated staff on hand to manage and operate your home network. You are ultimately responsible for your own computers. As a result, it is up to you to take reasonable precautions to secure your computers from accidental or intentional misuse.

What is a protocol?

A protocol is a well-defined specification that allows computers to communicate across a network. In a way, protocols define the "grammar" that computers can use to "talk" to each other.

What is IP?

IP stands for "Internet Protocol". It can be thought of as the common language of computers on the Internet. There are a number of detailed descriptions of IP given elsewhere, so we won't cover it in detail in this document. However, it is important to know a few things about IP in order to understand how to secure your computer. Here we’ll cover IP addresses, static vs. dynamic addressing, NAT, and TCP and UDP Ports.

国内专业的网络安全站点都有哪些？

卡饭

剑盟

这两个还是不错的

绅博

霏凡

这两个给人的感觉是已经开始衰落了，不过瘦死的骆驼比马大阿

早些年有一个IT十大论坛的说法，可惜到现在还存在的寥寥无几了～～～

你说的哪一类网站原来有几个风头很盛的~不过09年对于这一类网站来说是灾难性的一年，差不多比较好的都受到了打击。

你现在可以去华夏黑客同盟、红客基地看看~原本有一个大型的黑鹰基地，内容非常全，而且新，可惜啊~~~~

祈祷黑鹰老大能早点放出来

国内知名的网络安全公司有哪些

1、360企业安全

360企业安全集团于2015年5月25日成立。

2019年9月，360集团在北京宣布政企安全战略进入3.0时代，3.0时代的360企业安全集团定位是应对高阶网络威胁，面向关键基础设施，输出高端安全服务。同时，基于安全大数据漏洞挖掘、APT攻击发现等硬科技，具备安全运营、威胁情报、实网攻防、人才培养等软实力。

2、启明星辰

启明星辰信息技术集团股份有限公司成立于1996年，由留美博士严望佳女士创建，是一家拥有自主知识产权的网络安全高科技企业。

作为与国际接轨、勇于创新的先行者，启明星辰公司致力于提供具有国际竞争力的自主创新的安全产品和最佳实践服务，帮助客户全面提升其IT基础设施的安全性和生产效能。

3、深信服科技股份有限公司

深信服科技股份有限公司于2000年12月25日成立，英文名Sangfor Technologies Inc.，法定代表人何朝曦。

深信服是一家专注于企业级安全、云计算及IT基础设施的产品和服务供应商，拥有智安全、云计算和新IT三大业务品牌，致力于让用户的IT更简单、更安全、更有价值。

4、绿盟科技

绿盟科技集团股份有限公司（以下简称绿盟科技）成立于2000年4月，总部位于北京。在国内外设有40多个分支机构，为政府、运营商、金融、能源、互联网以及教育、医疗等行业用户，提供全线网络安全产品、全方位安全解决方案和体系化安全运营服务。

5、亚信安全

亚信安全科技有限公司于2014年11月25日成立。法定代表人田溯宁，公司经营范围包括：计算机软硬件、网络和通信产品、通信设备、家用电器、电子产品的开发、制造；承接计算机、网络系统工程；信息系统设计、咨询；销售自产产品；自有物业管理服务（依法须经批准的项目，经相关部门批准后方可开展经营活动）等。

国内知名的网络安全公司有哪些？

360，天融信 阿里等，还有各大网络安全设备生产公司都有网络安全部门，能力各有千秋

关于网络安全网站有哪些和网络安全网站有哪些公司的介绍到此就结束了，不知道你从中找到你需要的信息了吗 ？如果你还想了解更多这方面的信息，记得收藏关注本站。