snort 2 1 intrusion detection second edition phần 1 pptx

... Unregistered Version - http://www.simpopdf.com 29 5 _Snort_ 2e_ 01. qxd 5/4/04 4:50 PM Page 12 12 Chapter 1 • Intrusion Detection Systems Figure 1. 1 NIDS Network INTERNET Mail DNS NIDS NIDS ... http://www.simpopdf.com 29 5 _Snort_ 2e_ 01. qxd 5/4/04 4:50 PM Page 10 10 Chapter 1 • Intrusion Detection Systems ■ Network-Based Intrusion Detection System (NIDS) ■...

Ngày tải lên: 13/08/2014, 12:21

... 04/06 - 21 : 12 : 52. 016 027 408 1 92. 16 8 .1. 1 01 - 1 92. 16 8 .1. 1 02 - ICMP Echo Reply 04/06 - 21 : 12 : 52. 879979 3 82 1 92. 16 8 .1. 1 02 - 1 92. 16 8 .1. 1 01 - ICMP PING Windows 04/06 - 21 : 12 : 53.009 929 408 1 92. 16 8 .1. 1 01 - 1 92. 16 8 .1. 1 02 ... 04/06 - 21 : 12 : 49.87 611 6 3 82 1 92. 16 8 .1. 1 02 - 1 92. 16 8 .1. 1 01 - ICMP PING...

Ngày tải lên: 13/08/2014, 12:21

... flushed packets: INACTIVE flush_data_diff_size: 500 Ports: 21 23 25 53 80 11 0 11 1 14 3 513 14 33 Emergency Ports: 21 23 25 53 80 11 0 11 1 14 3 513 14 33 HttpInspect Config: GLOBAL CONFIG Max Pipeline ... like that: 03 /11 - 12 : 44:45. 424 5 51 0:A0:CC :29 :1D :13 -> 0 :20 :6F:3:7:CC type:0x800 len:0x7A 66.80 .14 6.8 :22 00 -> 69 .13 8 .22 5 .13 7: 12 8 9 TCP TTL:...

Ngày tải lên: 13/08/2014, 12:21

... be 1 92. 16 8.0.0 /24 , which means that the address space of 1 92. 16 8.0. 1 92. 16 8.0 .25 4 will be repre- sented, using a subnet mask of 25 5 .25 5 .25 5.0 (see Figure 3 .14 ). Figure 3 .14 Editing the snort. conf ... http://www.simpopdf.com 29 5 _Snort2 e_03.qxd 5/5/04 2: 55 PM Page 13 4 13 4 Chapter 3 • Installing Snort The second example is for versions earlier tha...

Ngày tải lên: 13/08/2014, 12:21

... Be Merged 10 .1. 0.0 /22 10 .1. 0.0 /24 , 10 .1 .2. 0 /24 , 10 .1. 4.0 /24 , 10 .1. 6.0 /24 19 8.0.0.0 /20 19 8 .1. 0.0 / 21 , 19 8 .2. 0.0 / 21 10 .10 0.80.0/ 31 10 .10 0.80 .1/ 32, 10 .10 0.80 .10 1/ 32 Merging subnet masks can save ... jay. 03 /13 -17 :58: 02. 520 000 xxx.xxx.xxx.xxx:36 922 -> xxx.xxx.xxx.xxx :23 TCP TTL:64 TOS:0x10 ID: 622 53 IpLen :20 DgmLen:53 DF ***...

Ngày tải lên: 13/08/2014, 12:21

... http://www.simpopdf.com 29 5 _Snort2 e_06.qxd 5/6/04 12 : 51 PM Page 310 Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 29 5 _Snort2 e_06.qxd 5/6/04 12 : 51 PM Page 28 1 Preprocessors • Chapter 6 28 1 ... Unregistered Version - http://www.simpopdf.com 29 5 _Snort2 e_06.qxd 5/6/04 12 : 51 PM Page 28 2 28 2 Chapter 6 • Preprocessors IAC SB SING HUMPTY-D...

Ngày tải lên: 13/08/2014, 12:21

... teardrop_attack_cap 16 : 52: 06. 029 368 1 72. 16 .10 .15 1 .1 025 > 1 72. 16 .10 .20 0 .13 5: [no cksum] udp 28 (frag 24 2:36@0+) (ttl 3, len 56) 16 : 52: 06.0463 02 1 72. 16 .10 .15 1 > 1 72. 16 .10 .20 0: (frag 24 2:4 @24 ) (ttl ... attack: Full Alert: [**] [11 3 :2: 1] (spp_frag2) Teardrop attack [**] 02/ 19 -16 : 52: 06.0463 02 1 72. 16 .10 .15 1 ->...

Ngày tải lên: 13/08/2014, 12:21

... 12 : 24:49.9 613 61 1 92. 16 8 .10 .13 .3093 > 1 92. 16 8.30 .17 1.ssh: P 36: 72( 36) ack 1 win 16 1 92 (DF) **** Press <ENTER> to send the next packet: 12 : 24:49.97 018 7 1 92. 16 8.30 .17 1.ssh > 1 92. 16 8 .10 .13 .3093: ... 12 : 24: 52. 970009 1 92. 16 8 .10 .13 .30 42 > 1 92. 16 8.30 .23 0.ssh: P 72: 10 8(36) ack 1 win 16 500 (DF) ****...

Ngày tải lên: 13/08/2014, 12:21

... –X –s 15 00 port 80 20 4 .17 4.x.x.53573 > 68.48.x.x.80: S 3 728 59 510 9:3 728 59 510 9(0) win 5840 68.48.x.x.80 > 20 4 .17 4.x.x.53573: S 25 23 514 769 :25 23 514 769(0) ack 3 728 59 511 0 win 57 92 20 4 .17 4.x.x.53573 ... . ack 1 win 5840 20 4 .17 4.x.x.53573 > 68.48.x.x.80: P 1: 119 (11 8) ack 1 win 5840 0x0000 4500 0000 0000 4000 320 6 2a68 ccae df18 E o@ .2. *h...

Ngày tải lên: 13/08/2014, 12:21

... 68 52 20 4 .17 4.x.x.486 62 > 1 92. 16 8 .10 .20 .80: F 11 9 :11 9(0) ack 5 72 win 68 52 1 92. 16 8 .10 .20 .80 > 20 4 .17 4.x.x.486 62: F 5 72: 5 72( 0) ack 12 0 win 57 92 20 4 .17 4.x.x.486 62 > 1 92. 16 8 .10 .20 .80: . ... 0 . 21 % Apr 27 22 :07: 02 localhost Snort: Bytes [10 54] 0 .20 % Apr 27 22 :07: 02 localhost Snort: Bytes [11 34] 0 .20 % Apr 2...

Ngày tải lên: 13/08/2014, 12:21