第5章批量主机扫描 nmap、ncat

第5章批量主机扫描

批量主机服务扫描

目的：

1、批量主机存活扫描。

2、针对主机服务扫描

作用：

1、能更方便快捷获取网络中主机的存活状态。

2、更加细致、智能获取主机服务侦査情况。

典型命令：nmap、ncat

nmap命令的使用介绍

扫描类型	描述	特点
ICMP协议类型(-P)	ping扫描	简单、快速、有效
TCP SYN 扫描(-sS)	TCP半开放扫描	1、高效 2、不易被检测 3、通用
TCP connect(扫描(-sT)	TCP全开放扫描	1、真实 2、结果可靠
UDP扫描(-sU)	UDP协议扫描	有效透过防火墙策略

icmp 不是tcp 协议

[root@centos-6 ~]# nmap -sP 10.0.1.10

Starting Nmap 5.51 ( http://nmap.org ) at 2019-10-14 07:27 UTC

Nmap scan report for 10.0.1.10

Host is up (0.00034s latency).

MAC Address: 08:00:27:66:D2:2F (Cadmus Computer Systems)

Nmap done: 1 IP address (1 host up) scanned in 0.12 seconds

[root@centos-6 ~]# nmap -sP 10.0.1.0/24

Starting Nmap 5.51 ( http://nmap.org ) at 2019-10-14 07:27 UTC

Nmap scan report for 10.0.1.1

Host is up (0.00021s latency).

MAC Address: 0A:00:27:00:00:1A (Unknown)

Nmap scan report for 10.0.1.10

Host is up (0.00024s latency).

MAC Address: 08:00:27:66:D2:2F (Cadmus Computer Systems)

Nmap scan report for 10.0.1.60

Host is up.

Nmap done: 256 IP addresses (3 hosts up) scanned in 9.26 seconds

[root@centos-6 ~]# nmap -sS 10.0.1.10

Starting Nmap 5.51 ( http://nmap.org ) at 2019-10-14 07:32 UTC

Nmap scan report for 10.0.1.10

Host is up (0.000074s latency).

Not shown: 997 closed ports

PORT STATE SERVICE

22/tcp open ssh

111/tcp open rpcbind

3306/tcp open mysql

MAC Address: 08:00:27:66:D2:2F (Cadmus Computer Systems)

Nmap done: 1 IP address (1 host up) scanned in 0.09 seconds

0-1024 默认扫描

[root@centos-6 ~]# nmap -sS -p 0-30000 10.0.1.10

Starting Nmap 5.51 ( http://nmap.org ) at 2019-10-14 07:42 UTC

Nmap scan report for 10.0.1.10

Host is up (0.000070s latency).

Not shown: 29998 closed ports

PORT STATE SERVICE

22/tcp open ssh

111/tcp open rpcbind

3306/tcp open mysql

MAC Address: 08:00:27:66:D2:2F (Cadmus Computer Systems)

Nmap done: 1 IP address (1 host up) scanned in 1.38 seconds

[root@centos-6 ~]# nmap -sT -p 0-30000 10.0.1.10

Starting Nmap 5.51 ( http://nmap.org ) at 2019-10-14 07:43 UTC

Nmap scan report for 10.0.1.10

Host is up (0.0016s latency).

Not shown: 29998 closed ports

PORT STATE SERVICE

22/tcp open ssh

111/tcp open rpcbind

3306/tcp open mysql

MAC Address: 08:00:27:66:D2:2F (Cadmus Computer Systems)

Nmap done: 1 IP address (1 host up) scanned in 2.10 seconds

扫描用udp会慢，一直处于等待的状态

ncat工具使用

组合参数

-W 设置的超时时间

-z —个输入输出模式

-ν 显示命令执行过程

方式一、基于tcp协议(默认)

nc -v -z -w2 10.10.250.254 1-50

方式二、基于udp协议-u

nc -v -u -z -w2 10.10.250.254 1-50

[root@centos-6 ~]# nc -v -z -w2 10.0.1.10 1-100

nc: connect to 10.0.1.10 port 1 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 2 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 3 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 4 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 5 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 6 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 7 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 8 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 9 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 10 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 11 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 12 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 13 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 14 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 15 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 16 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 17 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 18 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 19 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 20 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 21 (tcp) failed: Connection refused

Connection to 10.0.1.10 22 port [tcp/ssh] succeeded!

nc: connect to 10.0.1.10 port 23 (tcp) failed: Connection refused

nc: connect to 10.0.1.10 port 24 (tcp) failed: Connection refused

[root@centos-6 ~]# nc -u -v -z -w2 10.0.1.10 1-100

内核限制，单位时间不可达的数量