netcat nc

http://pan.baidu.com/s/1bo2IH9X#netcat  雲盤下載下傳      

[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]      

 掃描21-9000端口TCP：

[root@bass ~]# nc -v -w 2 192.168.1.35 -z 21-9000      

 -v 詳細輸出 -w secs timeout的時間 -z 端口的範圍

掃描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!      

 掃描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!