Snort里如何将一个tcpdump格式的二进制文件读取打印到屏幕上（图文详解）
不多说，直接上干货！
关于tcpdump二进制格式，这个基本概念不说。
支持tcpdump二进制格式的嗅探器工具，这里我说两个：tcpdump或者ethereal。
[root@datatest SecondWeek]# pwd
/root/data/DARPA1999/SecondWeek
[root@datatest SecondWeek]# ll
total
-rw-r--r--. root root Aug : inside.tcpdump
[root@datatest SecondWeek]# snort -dv -r inside.tcpdump
我这里，读取的是DARPA 1999数据集的第二周的内网inside.tcpdump二进制数据。
这里的 -r命令，我就不说啦。 就是将一个tcpdump格式的二进制文件读取打印到屏幕上的意思。
这里，我扩展下
[root@datatest SecondWeek]# snort -v
这个命令搭配的意思是，使得snort只输出IP、TCP、UDP和ICMP的包头信息。
[root@datatest SecondWeek]# snort -v -r inside.tcpdump
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ WARNING: No preprocessors configured for policy .
/-::46.461764 207.25.71.141: -> 172.16.112.194:
TCP TTL: TOS:0x0 ID: IpLen: DgmLen:
***A**S* Seq: 0x328B83B0 Ack: 0x48DA2A1F Win: 0x7FE0 TcpLen:
TCP Options () => MSS:
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ WARNING: No preprocessors configured for policy .
/-::46.461920 172.16.112.194: -> 207.25.71.141:
TCP TTL: TOS:0x0 ID: IpLen: DgmLen: DF
***A**** Seq: 0x48DA2A1F Ack: 0x328B83B1 Win: 0x7D78 TcpLen: *** Caught Int-Signal
WARNING: No preprocessors configured for policy .
/-::46.869826 172.16.112.194: -> 207.25.71.141:
TCP TTL: TOS:0x0 ID: IpLen: DgmLen: DF
***A**** Seq: 0x6F2E7AF7 Ack: 0xB057C6D7 Win: 0x7D78 TcpLen:
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ ===============================================================================
Run time for packet processing was 0.228905 seconds
Snort processed packets.
Snort ran for days hours minutes seconds
Pkts/sec:
===============================================================================
Memory usage summary:
Total non-mmapped bytes (arena):
Bytes in mapped regions (hblkhd):
Total allocated space (uordblks):
Total free space (fordblks):
Topmost releasable block (keepcost):
===============================================================================
Packet I/O Totals:
Received:
Analyzed: (100.000%)
Dropped: ( 0.000%)
Filtered: ( 0.000%)
Outstanding: ( 0.000%)
Injected:
===============================================================================
Breakdown by protocol (includes rebuilt packets):
Eth: (100.000%)
VLAN: ( 0.000%)
IP4: ( 97.319%)
Frag: ( 0.000%)
ICMP: ( 0.000%)
UDP: ( 10.590%)
TCP: ( 86.729%)
IP6: ( 0.000%)
IP6 Ext: ( 0.000%)
IP6 Opts: ( 0.000%)
Frag6: ( 0.000%)
ICMP6: ( 0.000%)
UDP6: ( 0.000%)
TCP6: ( 0.000%)
Teredo: ( 0.000%)
ICMP-IP: ( 0.000%)
IP4/IP4: ( 0.000%)
IP4/IP6: ( 0.000%)
IP6/IP4: ( 0.000%)
IP6/IP6: ( 0.000%)
GRE: ( 0.000%)
GRE Eth: ( 0.000%)
IP6/IP4: ( 0.000%)
IP6/IP6: ( 0.000%)
GRE: ( 0.000%)
GRE Eth: ( 0.000%)
GRE VLAN: ( 0.000%)
GRE IP4: ( 0.000%)
GRE IP6: ( 0.000%)
GRE IP6 Ext: ( 0.000%)
GRE PPTP: ( 0.000%)
GRE ARP: ( 0.000%)
GRE IPX: ( 0.000%)
GRE Loop: ( 0.000%)
MPLS: ( 0.000%)
ARP: ( 1.072%)
IPX: ( 0.000%)
Eth Loop: ( 1.340%)
Eth Disc: ( 0.000%)
IP4 Disc: ( 0.000%)
IP6 Disc: ( 0.000%)
TCP Disc: ( 0.000%)
UDP Disc: ( 0.000%)
ICMP Disc: ( 0.000%)
All Discard: ( 0.000%)
Other: ( 0.268%)
Bad Chk Sum: ( 0.000%)
Bad TTL: ( 0.000%)
S5 G : ( 0.000%)
S5 G : ( 0.000%)
Total:
===============================================================================
Snort exiting
[root@datatest SecondWeek]# snort -d
这个命令搭配的意思是，使得snort只包的数据信息。
[root@datatest SecondWeek]# snort -d -r inside.tcpdump
得到
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ WARNING: No preprocessors configured for policy .
/-::58.188692 206.48.44.18: -> 172.16.112.100:
TCP TTL: TOS:0x0 ID: IpLen: DgmLen: DF
***A**** Seq: 0x17AD29 Ack: 0x17AE81 Win: 0x2238 TcpLen: =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ WARNING: No preprocessors configured for policy .
/-::58.203130 172.16.112.100: -> 206.48.44.18:
TCP TTL: TOS:0x0 ID: IpLen: DgmLen: DF
***AP*** Seq: 0x17AE81 Ack: 0x17AD29 Win: 0x2238 TcpLen:
6D 4D 6F 6F hume Microso
ft FTP Service (
6F 6E 2E 2E 0D 0A Version 2.0)...
===============================================================================
Run time for packet processing was 0.232618 seconds
Snort processed packets.
Snort ran for days hours minutes seconds
Pkts/sec:
===============================================================================
Memory usage summary:
Total non-mmapped bytes (arena):
Bytes in mapped regions (hblkhd):
Total allocated space (uordblks):
Total free space (fordblks):
Topmost releasable block (keepcost):
===============================================================================
Packet I/O Totals:
Received:
Analyzed: (100.000%)
Dropped: ( 0.000%)
Filtered: ( 0.000%)
Outstanding: ( 0.000%)
Injected:
===============================================================================
Breakdown by protocol (includes rebuilt packets):
Eth: (100.000%)
VLAN: ( 0.000%)
IP4: ( 95.276%)
Frag: ( 0.000%)
ICMP: ( 0.000%)
UDP: ( 16.535%)
TCP: ( 78.740%)
IP6: ( 0.000%)
IP6 Ext: ( 0.000%)
IP6 Opts: ( 0.000%)
Frag6: ( 0.000%)
ICMP6: ( 0.000%)
UDP6: ( 0.000%)
TCP6: ( 0.000%)
Teredo: ( 0.000%)
ICMP-IP: ( 0.000%)
IP4/IP4: ( 0.000%)
IP4/IP6: ( 0.000%)
IP6/IP4: ( 0.000%)
IP6/IP6: ( 0.000%)
GRE: ( 0.000%)
GRE Eth: ( 0.000%)
GRE VLAN: ( 0.000%)
GRE IP4: ( 0.000%)
GRE IP6: ( 0.000%)
GRE IP6 Ext: ( 0.000%)
GRE PPTP: ( 0.000%)
GRE ARP: ( 0.000%)
GRE IPX: ( 0.000%)
GRE Loop: ( 0.000%)
MPLS: ( 0.000%)
ARP: ( 2.362%)
IPX: ( 0.000%)
Eth Loop: ( 1.969%)
Eth Disc: ( 0.000%)
IP4 Disc: ( 0.000%)
IP6 Disc: ( 0.000%)
TCP Disc: ( 0.000%)
UDP Disc: ( 0.000%)
ICMP Disc: ( 0.000%)
All Discard: ( 0.000%)
Other: ( 0.394%)
Bad Chk Sum: ( 0.000%)
Bad TTL: ( 0.000%)
S5 G : ( 0.000%)
S5 G : ( 0.000%)
Total:
===============================================================================
Snort exiting
[root@datatest SecondWeek]#
[root@datatest SecondWeek]# snort -dv
这个命令搭配的意思是，使得snort在输出IP、TCP、UDP和ICMP的包头信息的通俗，还显示包的数据信息。
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ WARNING: No preprocessors configured for policy .
/-::42.867811 195.73.151.50: -> 172.16.114.168:
TCP TTL: TOS:0x0 ID: IpLen: DgmLen: DF
***AP*** Seq: 0xE888C943 Ack: 0x9A021B4D Win: 0x7D78 TcpLen:
4D 4C 6F 6D 3A 3C MAIL From:<avrap
6C 6D 2E 6F 6E 2E @lambda.orange.c
6F 6D 3E 0D 0A om>.. =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ WARNING: No preprocessors configured for policy .
/-::42.868044 172.16.114.168: -> 195.73.151.50:
TCP TTL: TOS:0x0 ID: IpLen: DgmLen: DF
***AP*** Seq: 0x9A021B4D Ack: 0xE888C968 Win: 0x7FE0 TcpLen:
3C 6C 6D <avrap@lambd
2E 6F 6E 2E 6F 6D 3E 2E 2E 2E a.orange.com>...
6E 4F 6B 0D 0A Sender Ok.. =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ *** Caught Int-Signal
WARNING: No preprocessors configured for policy .
/-::42.875769 195.73.151.50: -> 172.16.114.168:
TCP TTL: TOS:0x0 ID: IpLen: DgmLen: DF
***A**** Seq: 0xE888CD92 Ack: 0x9A021BCE Win: 0x7D78 TcpLen:
6F 6E 2C 3A 0D 0A of gain, we:..
6F 6C 6C 6F could also
6F 4E uses The of Net
6F 6B 6E 6C 6E work neural netw
6F 6B 0D 0A orks a..
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4C 6F 6E 6F 6E 6C 6E London plays And
6C 3A 6C 0D re Tel: a while.
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===============================================================================
Run time for packet processing was 0.521737 seconds
Snort processed packets.
Snort ran for days hours minutes seconds
Pkts/sec:
===============================================================================
Memory usage summary:
Total non-mmapped bytes (arena):
Bytes in mapped regions (hblkhd):
Total allocated space (uordblks):
Total free space (fordblks):
Topmost releasable block (keepcost):
===============================================================================
Packet I/O Totals:
Received:
Analyzed: (100.000%)
Dropped: ( 0.000%)
Filtered: ( 0.000%)
Outstanding: ( 0.000%)
Injected:
===============================================================================
Breakdown by protocol (includes rebuilt packets):
Eth: (100.000%)
VLAN: ( 0.000%)
IP4: ( 94.169%)
Frag: ( 0.000%)
ICMP: ( 0.000%)
UDP: ( 21.283%)
TCP: ( 72.886%)
IP6: ( 0.000%)
IP6 Ext: ( 0.000%)
IP4/IP6: ( 0.000%)
IP6/IP4: ( 0.000%)
IP6/IP6: ( 0.000%)
GRE: ( 0.000%)
GRE Eth: ( 0.000%)
GRE VLAN: ( 0.000%)
GRE IP4: ( 0.000%)
GRE IP6: ( 0.000%)
GRE IP6 Ext: ( 0.000%)
GRE PPTP: ( 0.000%)
GRE ARP: ( 0.000%)
GRE IPX: ( 0.000%)
GRE Loop: ( 0.000%)
MPLS: ( 0.000%)
ARP: ( 2.332%)
IPX: ( 0.000%)
Eth Loop: ( 2.915%)
Eth Disc: ( 0.000%)
IP4 Disc: ( 0.000%)
IP6 Disc: ( 0.000%)
TCP Disc: ( 0.000%)
UDP Disc: ( 0.000%)
ICMP Disc: ( 0.000%)
All Discard: ( 0.000%)
Other: ( 0.583%)
Bad Chk Sum: ( 0.000%)
Bad TTL: ( 0.000%)
S5 G : ( 0.000%)
S5 G : ( 0.000%)
Total:
===============================================================================
Snort exiting
[root@datatest SecondWeek]#
进一步，见
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