Cisco Ethernet switch Manuel d'utilisateur Page 17
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l2-security-bh.ppt
MAC Flooding Switches with Macof
¥ [root@attack-lnx dsniff-2.3]# ./macof
¥ b5:cf:65:4b:d5:59 2c:01:12:7d:bd:36 0.0.0.0.4707 > 0.0.0.0.28005: S 106321318:106321318(0) win 512
¥ 68:2a:55:6c:1c:1c bb:33:bb:4d:c2:db 0.0.0.0.44367 > 0.0.0.0.60982: S 480589777:480589777(0) win 512
¥ 1e:95:26:5e:ab:4f d7:80:6f:2e:aa:89 0.0.0.0.42809 > 0.0.0.0.39934: S 1814866876:1814866876(0) win 51
2
¥ 51:b5:4a:7a:03:b3 70:a9:c3:24:db:2d 0.0.0.0.41274 > 0.0.0.0.31780: S 527694740:527694740(0) win 512
¥ 51:75:2e:22:c6:31 91:a1:c1:77:f6:18 0.0.0.0.36396 > 0.0.0.0.15064: S 1297621419:1297621419(0) win 51
2
¥ 7b:fc:69:5b:47:e2 e7:65:66:4c:2b:87 0.0.0.0.45053 > 0.0.0.0.4908: S 976491935:976491935(0) win 512
¥ 19:14:72:73:6f:ff 8d:ba:5c:40:be:d5 0.0.0.0.867 > 0.0.0.0.20101: S 287657898:287657898(0) win 512
¥ 63:c8:58:03:4e:f8 82:b6:ae:19:0f:e5 0.0.0.0.58843 > 0.0.0.0.40817: S 1693135783:1693135783(0) win 51
2
¥ 33:d7:e0:2a:77:70 48:96:df:20:61:b4 0.0.0.0.26678 > 0.0.0.0.42913: S 1128100617:1128100617(0) win 51
2
¥ f2:7f:96:6f:d1:bd c6:15:b3:21:72:6a 0.0.0.0.53021 > 0.0.0.0.5876: S 570265931:570265931(0) win 512
¥ 22:6a:3c:4b:05:7f 1a:78:22:30:90:85 0.0.0.0.58185 > 0.0.0.0.51696: S 1813802199:1813802199(0) win 51
2
¥ f6:60:da:3d:07:5b 3d:db:16:11:f9:55 0.0.0.0.63763 > 0.0.0.0.63390: S 1108461959:1108461959(0) win 51
2
¥ bc:fd:c0:17:52:95 8d:c1:76:0d:8f:b5 0.0.0.0.55865 > 0.0.0.0.20361: S 309609994:309609994(0) win 512
¥ bb:c9:48:4c:06:2e 37:12:e8:19:93:4e 0.0.0.0.1618 > 0.0.0.0.9653: S 1580205491:1580205491(0) win 512
¥ e6:23:b5:47:46:e7 78:11:e3:72:05:44 0.0.0.0.18351 > 0.0.0.0.3189: S 217057268:217057268(0) win 512
¥ c9:89:97:4b:62:2a c3:4a:a8:48:64:a4 0.0.0.0.23021 > 0.0.0.0.14891: S 1200820794:1200820794(0) win 51
2
¥ 56:30:ac:0b:d0:ef 1a:11:57:4f:22:68 0.0.0.0.61942 > 0.0.0.0.17591: S 1535090777:1535090777(0) win 51
2
- Hacking Layer 2: Fun with 1
- Ethernet Switches 1
- ¥ Layer 2 Attack Landscape 2
- ¥ Summary and Case Study 2
- The Domino Effect 5
- The Numbers from CSI/FBI 7
- MAC Attacks 8
- MAC Address/CAM Table Review 9
- Normal CAM Behaviour 1/3 10
- Normal CAM Behaviour 2/3 11
- Normal CAM Behaviour 3/3 12
- CAM Overflow 1/3 13
- CAM Overflow 2/3 14
- CAM Overflow 3/3 15
- Catalyst CAM Tables 16
- CAM Table Full! 18
- ¥ Port Security 19
- Port Security Details 20
- VLAN ÒHoppingÓ Attacks 21
- Trunk Port Refresher 22
- 0100.0ccc.cccc 24
- Dynamic Trunk Protocol (DTP) 25
- Basic VLAN Hopping Attack 26
- Hopping Attack 27
- Outer Tag, Attacker VLAN 28
- Inner Tag, Victim VLAN 28
- Disabling Auto-Trunking 29
- Security Best Practices 30
- ARP Attacks 31
- ARP Refresher 32
- Gratuitous ARP 33
- Misuse of Gratuitous ARP 34
- A Test in the Lab 35
- ¥ ARP spoofing 36
- ¥ MAC flooding 36
- ¥ Selective sniffing 36
- ¥ SSH/SSL interception 36
- Arpspoof in Action 37
- More on Arpspoof 38
- Selective Sniffing 39
- SSL/SSH Interception 40
- Dsniff evolves: Ettercap 43
- Can It Get Much Easier? 44
- ARP Entries do not age out 46
- Community Ports 46
- Private VLAN Configuration 47
- More ARP Spoof Mitigation 49
- Spanning Tree Attacks 50
- Spanning Tree Basics 51
- STP Attack Mitigation 56
- VLAN Trunking Protocol (VTP) 57
- Potential VTP Attacks 58
- Layer 2 Port Authentication 59
- Dynamic VLAN Access Ports 60
- VMPS Architecture 61
- VMPS/VQP Attacks 62
- VMPS/VQP Attack Mitigation 63
- (TLS, MD5, OTP) 64
- 802.1X Port Authentication 65
- Other Attacks 66
- 0100.0ccc.cccc 67
- CDP Attacks 68
- DHCP Starvation Attacks 69
- Private VLAN Attacks 1/2 71
- Private VLAN Attacks 2/2 72
- PVLAN Attack Mitigation 73
- Nice Try 74
- Random Frame Stress Attack 75
- IP Telephony Considerations 76
- Switch Management 77
- Summary and Case Study 78
- Your Own Security Policy 80
- A Relevant Case Study 81
- A More Secure Alternative 82
- Lessons Learned 83
- Further Reading 84
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