Linux系统/网络管理员的Nmap命令的29个实用示例-系统运维-优客志

nmap的网络又名映射是一个开放源码和Linux系统/网络管理员一个非常通用的工具 。Nmap的用于 探索网络 进行安全扫描 ， 网络审计和远程计算机上 发现的开放端口 。它扫描在远程主机上运行的Live主机，操作系统，包过滤器和开放端口。

Nmap命令和示例

我将涵盖大部分使用 NMAP在两个不同的部分，这是严重的nmap的第一部分。在这个设置中，我使用了两个没有防火墙的服务器来测试Nmap命令的工作。

192.168.0.100 - server1.youcl.com
192.168.0.101 - server2.youcl.com

Nmap命令用法

# nmap [Scan Type(s)] [Options] {target specification}

如何在Linux中安装NMAP

大多数今天的Linux发行版像红帽 ，CentOS的 ，Fedoro，Debian和 Ubuntu都在其默认的软件包管理库叫做包括 Nmap的 Yum和 APT 。这两个工具都用于安装和管理软件包和更新。要在分配具体使用安装 的Nmap以下命令。

# yum install nmap		[on Red Hat based systems]
$ sudo apt-get install nmap	[on Debian based systems]

一旦你安装了最新的nmap应用程序，你可以按照本文提供的示例说明。

1.使用主机名和IP地址扫描系统

中的 nmap工具提供各种方法来扫描系统。在这个例子中，我使用执行主机名 server2.youcl.com找出系统中的所有开放端口，服务和MAC地址扫描。

使用主机名扫描

[root@server1 ~]# nmap server2.youcl.com
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 15:42 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.415 seconds
You have new mail in /var/spool/mail/root

使用IP地址扫描

[root@server1 ~]# nmap 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-18 11:04 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
958/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.465 seconds
You have new mail in /var/spool/mail/root

2.使用“-v”选项扫描

你可以看到，下面的命令与 “-v”选项提供有关远程计算机的详细信息。

[root@server1 ~]# nmap -v server2.youcl.com
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 15:43 EST
Initiating ARP Ping Scan against 192.168.0.101 [1 port] at 15:43
The ARP Ping Scan took 0.01s to scan 1 total hosts.
Initiating SYN Stealth Scan against server2.youcl.com (192.168.0.101) [1680 ports] at 15:43
Discovered open port 22/tcp on 192.168.0.101
Discovered open port 80/tcp on 192.168.0.101
Discovered open port 8888/tcp on 192.168.0.101
Discovered open port 111/tcp on 192.168.0.101
Discovered open port 3306/tcp on 192.168.0.101
Discovered open port 957/tcp on 192.168.0.101
The SYN Stealth Scan took 0.30s to scan 1680 total ports.
Host server2.youcl.com (192.168.0.101) appears to be up ... good.
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.485 seconds
Raw packets sent: 1681 (73.962KB) | Rcvd: 1681 (77.322KB)

扫描多个主机

您可以通过使用Nmap写入其IP地址或主机名来扫描多个主机。

[root@server1 ~]# nmap 192.168.0.101 192.168.0.102 192.168.0.103
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:06 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 3 IP addresses (1 host up) scanned in 0.580 seconds

4.扫描整个子网

您可以通过提供与 *通配符它扫描整个子网或IP范围内的Nmap。

[root@server1 ~]# nmap 192.168.0.*
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:11 EST
Interesting ports on server1.youcl.com (192.168.0.100):
Not shown: 1677 closed ports
PORT    STATE SERVICE
22/tcp  open  ssh
111/tcp open  rpcbind
851/tcp open  unknown
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 256 IP addresses (2 hosts up) scanned in 5.550 seconds
You have new mail in /var/spool/mail/root

在上面的输出中可以看到，nmap的扫描整个子网，并提供了关于那些 Up在网络主机的信息。

5.使用IP地址的最后一个字节扫描多个服务器

您可以通过简单指定IP地址的最后一个八位字节对多个IP地址执行扫描。例如，这里我对IP地址192.168.0.101,192.168.0.102和192.168.0.103执行扫描。

[root@server1 ~]# nmap 192.168.0.101,102,103
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:09 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 3 IP addresses (1 host up) scanned in 0.552 seconds
You have new mail in /var/spool/mail/root

6.从文件中扫描主机列表

如果要扫描更多的主机，并将所有主机详细信息写入文件，则可以直接请求nmap读取该文件并执行扫描。让我们看看如何做到这一点。创建一个名为 “nmaptest.txt”的文本文件，并定义你想要做一个扫描的所有IP地址或服务器主机名。

[root@server1 ~]# cat > nmaptest.txt
localhost
server2.youcl.com
192.168.0.101

接下来，运行与使用nmap命令 “IL”选项，以扫描所有列出的IP地址，在文件中下面的命令。

[root@server1 ~]# nmap -iL nmaptest.txt
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-18 10:58 EST
Interesting ports on localhost.localdomain (127.0.0.1):
Not shown: 1675 closed ports
PORT    STATE SERVICE
22/tcp  open  ssh
25/tcp  open  smtp
111/tcp open  rpcbind
631/tcp open  ipp
857/tcp open  unknown
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
958/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
958/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 3 IP addresses (3 hosts up) scanned in 2.047 seconds

7.扫描IP地址范围

您可以使用Nmap执行扫描时指定IP范围。

[root@server1 ~]# nmap 192.168.0.101-110
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:09 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 10 IP addresses (1 host up) scanned in 0.542 seconds

8.扫描网络，排除远程主机

在执行一个完整的网络扫描，或当你用 “-exclude”选项通配符扫描您可以排除一些主机。

[root@server1 ~]# nmap 192.168.0.* --exclude 192.168.0.100
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:16 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 255 IP addresses (1 host up) scanned in 5.313 seconds
You have new mail in /var/spool/mail/root

9.扫描操作系统信息和Traceroute

使用Nmap，您可以检测在远程主机上运行的操作系统和版本。为了使操作系统和版本检测，脚本扫描和traceroute，我们可以使用与 NMAP“-a”选项。

[root@server1 ~]# nmap -A 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:25 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE VERSION
22/tcp   open  ssh     OpenSSH 4.3 (protocol 2.0)
80/tcp   open  http    Apache httpd 2.2.3 ((CentOS))
111/tcp  open  rpcbind  2 (rpc #100000)
957/tcp  open  status   1 (rpc #100024)
3306/tcp open  mysql   MySQL (unauthorized)
8888/tcp open  http    lighttpd 1.4.32
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
No exact OS matches for host (If you know what OS is running on it, see http://www.insecure.org/cgi-bin/nmap-submit.cgi).
TCP/IP fingerprint:
SInfo(V=4.11%P=i686-redhat-linux-gnu%D=11/11%Tm=52814B66%O=22%C=1%M=080027)
TSeq(Class=TR%IPID=Z%TS=1000HZ)
T1(Resp=Y%DF=Y%W=16A0%ACK=S++%Flags=AS%Ops=MNNTNW)
T2(Resp=N)
T3(Resp=Y%DF=Y%W=16A0%ACK=S++%Flags=AS%Ops=MNNTNW)
T4(Resp=Y%DF=Y%W=0%ACK=O%Flags=R%Ops=)
T5(Resp=Y%DF=Y%W=0%ACK=S++%Flags=AR%Ops=)
T6(Resp=Y%DF=Y%W=0%ACK=O%Flags=R%Ops=)
T7(Resp=Y%DF=Y%W=0%ACK=S++%Flags=AR%Ops=)
PU(Resp=Y%DF=N%TOS=C0%IPLEN=164%RIPTL=148%RID=E%RIPCK=E%UCK=E%ULEN=134%DAT=E)
Uptime 0.169 days (since Mon Nov 11 12:22:15 2013)
Nmap finished: 1 IP address (1 host up) scanned in 22.271 seconds
You have new mail in /var/spool/mail/root

在上面的输出，你可以看到，nmap的是想出了远程主机上运行，并为更具体的关于在远程主机上运行的端口和服务 操作系统的 TCP / IP指纹。

10.使用Nmap启用操作系统检测

使用选项 “O”和 “-osscan猜测 ”也有助于发现操作系统信息。

[root@server1 ~]# nmap -O server2.youcl.com
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:40 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
No exact OS matches for host (If you know what OS is running on it, see http://www.insecure.org/cgi-bin/nmap-submit.cgi).
TCP/IP fingerprint:
SInfo(V=4.11%P=i686-redhat-linux-gnu%D=11/11%Tm=52815CF4%O=22%C=1%M=080027)
TSeq(Class=TR%IPID=Z%TS=1000HZ)
T1(Resp=Y%DF=Y%W=16A0%ACK=S++%Flags=AS%Ops=MNNTNW)
T2(Resp=N)
T3(Resp=Y%DF=Y%W=16A0%ACK=S++%Flags=AS%Ops=MNNTNW)
T4(Resp=Y%DF=Y%W=0%ACK=O%Flags=Option -O and -osscan-guess also helps to discover OS
R%Ops=)
T5(Resp=Y%DF=Y%W=0%ACK=S++%Flags=AR%Ops=)
T6(Resp=Y%DF=Y%W=0%ACK=O%Flags=R%Ops=)
T7(Resp=Y%DF=Y%W=0%ACK=S++%Flags=AR%Ops=)
PU(Resp=Y%DF=N%TOS=C0%IPLEN=164%RIPTL=148%RID=E%RIPCK=E%UCK=E%ULEN=134%DAT=E)
Uptime 0.221 days (since Mon Nov 11 12:22:16 2013)
Nmap finished: 1 IP address (1 host up) scanned in 11.064 seconds
You have new mail in /var/spool/mail/root

11.扫描主机以检测防火墙

以下命令将在远程主机上执行扫描，以检测主机是否使用任何数据包过滤器或防火墙。

[root@server1 ~]# nmap -sA 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:27 EST
All 1680 scanned ports on server2.youcl.com (192.168.0.101) are UNfiltered
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.382 seconds
You have new mail in /var/spool/mail/root

12.扫描主机以检查其受防火墙保护

扫描主机（如果受任何数据包过滤软件或防火墙保护）。

[root@server1 ~]# nmap -PN 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:30 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.399 seconds

13.查找网络中的Live主机

随着 “-sP”选项的帮助下，我们可以简单地检查哪些主机是活的，最多的网络，使用此选项的nmap跳过端口检测和其他东西。

[root@server1 ~]# nmap -sP 192.168.0.*
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-18 11:01 EST
Host server1.youcl.com (192.168.0.100) appears to be up.
Host server2.youcl.com (192.168.0.101) appears to be up.
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 256 IP addresses (2 hosts up) scanned in 5.109 seconds

14.执行快速扫描

您可以执行与 “-F”选项，扫描在nmap-services中的文件中列出的端口快速扫描和叶的所有其他端口。

[root@server1 ~]# nmap -F 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:47 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1234 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.322 seconds

15.查找Nmap版本

你可以找到Nmap的版本，您正在使用 “-V”选项，你的机器上运行。

[root@server1 ~]# nmap -V
Nmap version 4.11 ( http://www.insecure.org/nmap/ )
You have new mail in /var/spool/mail/root

16.连续扫描端口

使用 “-r”标志不随机。

[root@server1 ~]# nmap -r 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 16:52 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.363 seconds

17.打印主机接口和路由

您可以通过使用 “-iflist”选项找出主机接口和路由信息，使用nmap。

[root@server1 ~]# nmap --iflist
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:07 EST
************************INTERFACES************************
DEV  (SHORT) IP/MASK          TYPE     UP MAC
lo   (lo)    127.0.0.1/8      loopback up
eth0 (eth0)  192.168.0.100/24 ethernet up 08:00:27:11:C7:89
**************************ROUTES**************************
DST/MASK      DEV  GATEWAY
192.168.0.0/0 eth0
169.254.0.0/0 eth0

在上面的输出中，您可以看到地图列出了连接到您的系统及其相应路由的接口。

18.扫描特定端口

有各种选项可以使用Nmap发现远程机器上的端口。您可以通过默认的nmap只扫描 TCP端口指定要使用的 nmap“-p”选项来扫描该端口。

[root@server1 ~]# nmap -p 80 server2.youcl.com
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:12 EST
Interesting ports on server2.youcl.com (192.168.0.101):
PORT   STATE SERVICE
80/tcp open  http
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) sca

19.扫描TCP端口

您还可以使用nmap来指定特定的端口类型和编号。

[root@server1 ~]# nmap -p T:8888,80 server2.youcl.com
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:15 EST
Interesting ports on server2.youcl.com (192.168.0.101):
PORT     STATE SERVICE
80/tcp   open  http
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.157 seconds

20.扫描UDP端口

[root@server1 ~]# nmap -sU 53 server2.youcl.com
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:15 EST
Interesting ports on server2.youcl.com (192.168.0.101):
PORT     STATE SERVICE
53/udp   open  http
8888/udp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.157 seconds

21.扫描多个端口

您也可以使用扫描选项 “-p”多个端口。

[root@server1 ~]# nmap -p 80,443 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-18 10:56 EST
Interesting ports on server2.youcl.com (192.168.0.101):
PORT    STATE  SERVICE
80/tcp  open   http
443/tcp closed https
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.190 seconds

22.按网络范围扫描端口

您可以使用表达式扫描带有范围的端口。

[root@server1 ~]#  nmap -p 80-160 192.168.0.101

23.查找主机服务版本号

我们可以找出哪些是与 “-sV”选项，远程主机上运行的服务的版本。

[root@server1 ~]# nmap -sV 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:48 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE VERSION
22/tcp   open  ssh     OpenSSH 4.3 (protocol 2.0)
80/tcp   open  http    Apache httpd 2.2.3 ((CentOS))
111/tcp  open  rpcbind  2 (rpc #100000)
957/tcp  open  status   1 (rpc #100024)
3306/tcp open  mysql   MySQL (unauthorized)
8888/tcp open  http    lighttpd 1.4.32
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 12.624 seconds

24.使用TCP ACK（PA）和TCP Syn（PS）扫描远程主机，

有时候，包过滤防火墙块标准 ICMP ping请求，在这种情况下，我们可以使用 TCP ACK和 TCP SYN方法来扫描远程主机。

[root@server1 ~]# nmap -PS 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 17:51 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.360 seconds
You have new mail in /var/spool/mail/root

25.使用TCP ACK扫描特定端口的远程主机

[root@server1 ~]# nmap -PA -p 22,80 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 18:02 EST
Interesting ports on server2.youcl.com (192.168.0.101):
PORT   STATE SERVICE
22/tcp open  ssh
80/tcp open  http
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.166 seconds
You have new mail in /var/spool/mail/root

26.使用TCP Syn扫描特定端口的远程主机

[root@server1 ~]# nmap -PS -p 22,80 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 18:08 EST
Interesting ports on server2.youcl.com (192.168.0.101):
PORT   STATE SERVICE
22/tcp open  ssh
80/tcp open  http
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.165 seconds
You have new mail in /var/spool/mail/root

27.执行隐身扫描

[root@server1 ~]# nmap -sS 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 18:10 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.383 seconds
You have new mail in /var/spool/mail/root

28.使用TCP Syn检查最常用的端口

[root@server1 ~]# nmap -sT 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 18:12 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
80/tcp   open  http
111/tcp  open  rpcbind
957/tcp  open  unknown
3306/tcp open  mysql
8888/tcp open  sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 0.406 seconds
You have new mail in /var/spool/mail/root

29.执行tcp空扫描以欺骗防火墙

[root@server1 ~]# nmap -sN 192.168.0.101
Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2013-11-11 19:01 EST
Interesting ports on server2.youcl.com (192.168.0.101):
Not shown: 1674 closed ports
PORT     STATE         SERVICE
22/tcp   open|filtered ssh
80/tcp   open|filtered http
111/tcp  open|filtered rpcbind
957/tcp  open|filtered unknown
3306/tcp open|filtered mysql
8888/tcp open|filtered sun-answerbook
MAC Address: 08:00:27:D9:8E:D7 (Cadmus Computer Systems)
Nmap finished: 1 IP address (1 host up) scanned in 1.584 seconds
You have new mail in /var/spool/mail/root

这与 NMAP这是现在，我会在我们这个严重的第二部分来了 NMAP的更具创意的选择。直到那时，请继续关注我们，不要忘记分享您的宝贵意见。