http://pan.baidu.com/s/1bo2IH9X#netcat 云盘下载
[root@bass ~]# tar -xjvf netcat-0.7.1.tar.bz2
[root@bass ~]# cd netcat-0.7.1
[root@bass ~]# ./configure --prefix=/usr/local/netcat
[root@bass ~]# make && make install
[root@bass ~]# tree /usr/local/netcat/
/usr/local/netcat/
├── bin
│ ├── nc -> netcat
│ └── netcat
├── info
│ ├── dir
│ └── netcat.info
├── man
│ └── man1
│ └── netcat.1
└── share
└── locale
├── it
│ └── LC_MESSAGES
│ └── netcat.mo
└── sk
└── LC_MESSAGES
└── netcat.mo
10 directories, 7 files
[root@bass ~]# nc -h
usage: nc [-46DdhklnrStUuvzC] [-i interval] [-p source_port]
[-s source_ip_address] [-T ToS] [-w timeout] [-X proxy_version]
[-x proxy_address[:port]] [hostname] [port[s]]
Command Summary:
-4 Use IPv4
-6 Use IPv6
-D Enable the debug socket option
-d Detach from stdin
-h This help text
-i secs Delay interval for lines sent, ports scanned
-k Keep inbound sockets open for multiple connects
-l Listen mode, for inbound connects
-n Suppress name/port resolutions
-p port Specify local port for remote connects
-r Randomize remote ports
-S Enable the TCP MD5 signature option
-s addr Local source address
-T ToS Set IP Type of Service
-C Send CRLF as line-ending
-t Answer TELNET negotiation
-U Use UNIX domain socket
-u UDP mode
-v Verbose
-w secs Timeout for connects and final net reads
-X proto Proxy protocol: "4", "5" (SOCKS) or "connect"
-x addr[:port] Specify proxy address and port
-z Zero-I/O mode [used for scanning]
Port numbers can be individual or ranges: lo-hi [inclusive]
扫描21-9000端口TCP：
[root@bass ~]# nc -v -w 2 192.168.1.35 -z 21-9000
-v 详细输出 -w secs timeout的时间 -z 端口的范围
扫描21-80端口UDP
[root@bass ~]# nc -z -v -u -n 122.56.183.103 21-80 Connection to 122.56.183.103 27 port [udp/*] succeeded! Connection to 122.56.183.103 37 port [udp/*] succeeded! Connection to 122.56.183.103 41 port [udp/*] succeeded! Connection to 122.56.183.103 44 port [udp/*] succeeded! Connection to 122.56.183.103 50 port [udp/*] succeeded! Connection to 122.56.183.103 62 port [udp/*] succeeded! Connection to 122.56.183.103 65 port [udp/*] succeeded! Connection to 122.56.183.103 69 port [udp/*] succeeded! Connection to 122.56.183.103 80 port [udp/*] succeeded!
扫描21-80端口TCP
[root@bass ~]# nc -z -v -n 122.56.183.103 21-80 Connection to 122.56.183.103 21 port [tcp/*] succeeded! Connection to 122.56.183.103 22 port [tcp/*] succeeded! nc: connect to 122.56.183.103 port 23 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 24 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 25 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 26 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 27 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 28 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 29 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 30 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 31 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 32 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 33 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 34 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 35 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 36 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 37 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 38 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 39 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 40 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 41 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 42 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 43 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 44 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 45 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 46 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 47 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 48 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 49 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 50 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 51 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 52 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 53 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 54 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 55 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 56 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 57 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 58 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 59 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 60 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 61 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 62 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 63 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 64 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 65 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 66 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 67 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 68 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 69 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 70 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 71 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 72 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 73 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 74 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 75 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 76 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 77 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 78 (tcp) failed: Connection refused nc: connect to 122.56.183.103 port 79 (tcp) failed: Connection refused Connection to 122.56.183.103 80 port [tcp/*] succeeded!