小狼

NC – 单击下载

著名工具，有网络军刀之称。

应用举例：

在本地监听80端口，并用浏览器访问观察浏览器发出的http请求。

执行：nc -L -vv -p 80

其中：

• -l表示监听（大写L表示当连接断开后继续监听，小写l则在连接断开后退出nc）
• -v表示详细信息（两个v则更详细）
• -p表示本地监听（绑定）端口

更多参数：

[v1.10 NT]
connect to somewhere: nc [-options] hostname port[s] [ports] ...
listen for inbound: nc -l -p port [options] [hostname] [port]
options:
-d detach from console, stealth mode

-e prog inbound program to exec [dangerous!!]
-g gateway source-routing hop point[s], up to 8
-G num source-routing pointer: 4, 8, 12, ...
-h this cruft
-i secs delay interval for lines sent, ports scanned
-l listen mode, for inbound connects
-L listen harder, re-listen on socket close
-n numeric-only IP addresses, no DNS
-o file hex dump of traffic
-p port local port number
-r randomize local and remote ports
-s addr local source address
-t answer TELNET negotiation
-u UDP mode
-v verbose [use twice to be more verbose]
-w secs timeout for connects and final net reads
-z zero-I/O mode [used for scanning]
port numbers can be individual or ranges: m-n [inclusive]