Firewalking

　　A technique for testing the vulnerability of a firewall and mapping the routers of a network that sits behind a firewall. Firewalking is a method of disguising port scans. In practical applications, firewalking is similar to tracerouting and works by sending into the firewall TCP or UDP packets that have a TTL set at one hop greater than the targeted firewall. If the packet makes it through the gateway, it is forwarded to the next hop where the TTL equals zero and elicits a TTL “exceeded in transit” message, at which point the packet is discarded. Using this method, access information on the firewall can be determined if successive probe packets are sent.

防火墙

　　一项测试防火墙弱点和绘制防火墙后面网络上的路由器分布的技术。趟火墙是一种伪装端口扫描的方法。在实际应用中，趟火墙与路由跟踪技术类似，工作时把一跳的生存时间字段设定大于目标防火墙的 TCP或UDP包送进防火墙。如果该包通过了网关，它就转到下一跳，这时生存时间为零并得出生存时间“传输超时”的信息，在此情况下该包被废弃。利用此法，如果发送连续的探测包，就能确定防火墙上的接入信息。

Typosquatting

　　slang. Registering a domain name that is a variation on a popular domain name with the expectation that the site will get traffic off of the popular site because of a user's misspelling of the name. For example, registering the domain names sino.com or yahooo.com in the hopes that someone making a typo will get to that site unexpectedly.

注册近似域名

　　（俚语）注册流行域名的变种，希望如果用户把该流行网站的名字拼错时，能从该流行网站拉些流量过来。例如，注册 sino.com或yahooo.com域名，希望有人打字出错而意想不到地进入这些网站。

Cybersquatting

　　Cybersquatting is the act of registering a popular Internet address——usually a company name——with the intent of selling it to its rightful owner.

（域名）抢注

　　（域名）抢注是指注册一个流行的因特网地址（通常是公司的名字）的行为，意图是把它卖给合法的拥有者。

Inode

　　Data structures that contain information about files in Unix file systems that are created when a file system is created. Each file has an inode and is identified by an inode number (i-number) in the file system where it resides. inodes provide important information on files such as user and group ownership, access mode (read, write, execute permissions) and type. A file's inode number can be found using the ls -i command, while the ls -l command will retrieve inode information.

信息点

　　这是一种数据结构，它包含了 Unix文件系统中文件的信息，它是在生成系统时生成的。每个文件有一信息点，在其所在的文件系统中，它用信息点编号（i-number）来识别。信息点提供了文件的重要信息，如用户和用户组的拥有权、访问方式（允许读、写、还是执行）和类型。文件的信息点编号可以用“ls -i”命令找到，用“ls -l”命令能检索信息点的信息。