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开发学院操作系统Linux/Unix 系统管理工具包: 网络扫描 阅读

系统管理工具包: 网络扫描

 2008-11-11 08:28:13 来源:WEB开发网   
核心提示: 对于所扫描的数据包内的所有行,使用协议级别作为前缀,系统管理工具包: 网络扫描(9),在这个示例中,您可以看到原始以太网、IP 和 TCP 数据包,您将看到该文件的具体信息(一般是在列出目录期间),并且您可以看到文件的类型、权限以及修改时间信息,包括源、目标主机的信息以及数据包选项,在远程

对于所扫描的数据包内的所有行,使用协议级别作为前缀。在这个示例中,您可以看到原始以太网、IP 和 TCP 数据包,包括源、目标主机的信息以及数据包选项。

在远程过程调用 (RPC) 级别,您记录下 NFS 请求的信息,然后在 NFS 文件中,您可以获得实际交换的数据。在这个示例中,您将看到该文件的具体信息(一般是在列出目录期间),并且您可以看到文件的类型、权限以及修改时间信息。

清单 6 显示了域名服务器 (DNS) 查找某个主机名期间的输出。

清单 6. DNS 查找某个主机名期间的输出

ETHER: ----- Ether Header -----
ETHER: 
ETHER: Packet 2 arrived at 10:05:19.05284
ETHER: Packet size = 155 bytes
ETHER: Destination = 0:2:11:90:15:31,
ETHER: Source   = 0:16:cb:85:2d:15,
ETHER: Ethertype = 0800 (IP)
ETHER: 
IP:  ----- IP Header -----
IP: 
IP:  Version = 4
IP:  Header length = 20 bytes
IP:  Type of service = 0x00
IP:     xxx. .... = 0 (precedence)
IP:     ...0 .... = normal delay
IP:     .... 0... = normal throughput
IP:     .... .0.. = normal reliability
IP:     .... ..0. = not ECN capable transport
IP:     .... ...0 = no ECN congestion experienced
IP:  Total length = 141 bytes
IP:  Identification = 53767
IP:  Flags = 0x0
IP:     .0.. .... = may fragment
IP:     ..0. .... = last fragment
IP:  Fragment offset = 0 bytes
IP:  Time to live = 64 seconds/hops
IP:  Protocol = 17 (UDP)
IP:  Header checksum = 267b
IP:  Source address = 192.168.0.110, narcissus.mcslp.pri
IP:  Destination address = 192.168.0.31, ultra3
IP:  No options
IP: 
UDP: ----- UDP Header -----
UDP: 
UDP: Source port = 53
UDP: Destination port = 46232
UDP: Length = 121
UDP: Checksum = 0C31
UDP: 
DNS: ----- DNS Header -----
DNS: 
DNS: Response ID = 55625
DNS: AA (Authoritative Answer) RA (Recursion Available)
DNS: Response Code: 0 (OK)
DNS: Reply to 1 question(s)
DNS:   Domain Name: www.mcslp.pri.
DNS:   Class: 1 (Internet)
DNS:   Type: 28 (IPv6 Address)
DNS: 
DNS: 2 answer(s)
DNS:   Domain Name: www.mcslp.pri.
DNS:   Class: 1 (Internet)
DNS:   Type: 5 (Canonical Name)
DNS:   TTL (Time To Live): 86400
DNS:   Canonical Name: narcissus.mcslp.pri.
DNS: 
DNS:   Domain Name: narcissus.mcslp.pri.
DNS:   Class: 1 (Internet)
DNS:   Type: 28 (IPv6 Address)
DNS:   TTL (Time To Live): 86400
DNS:   IPv6 Address: fe80::216:cbff:fe85:2d15
DNS: 
DNS: 1 name server resource(s)
DNS:   Domain Name: mcslp.pri.
DNS:   Class: 1 (Internet)
DNS:   Type: 2 (Authoritative Name Server)
DNS:   TTL (Time To Live): 86400
DNS:   Authoritative Name Server: narcissus.mcslp.pri.
DNS: 
DNS: 1 additional record(s)
DNS:   Domain Name: narcissus.mcslp.pri.
DNS:   Class: 1 (Internet)
DNS:   Type: 1 (Address)
DNS:   TTL (Time To Live): 86400
DNS:   Address: 192.168.0.110
DNS:

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