Cisco Nexus 3600 NX-OS User manual

Cisco Nexus 3600 NX-OS Security Configuration Guide, Release 7.x
First Published: 2017-09-27
Last Modified: 2018-02-27
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CONTENTS
Preface Preface xi
Audience xi
Document Conventions xi
Obtaining Documentation and Submitting a Service Request xii
Documentation Feedback xii
Related Documentation for Cisco Nexus 3600 Platform Switches xiii
CHAPTER 1 New and Changed Information 1
New and Changed Information 1
CHAPTER 2 Overview 3
Authentication, Authorization, and Accounting 3
RADIUS and TACACS+ Security Protocols 4
SSH and Telnet 4
SSH and Telnet 5
IP ACLs 5
CHAPTER 3 Configuring AAA 7
Information About AAA 7
AAA Security Services 7
Benefits of Using AAA 8
Remote AAA Services 8
AAA Server Groups 8
AAA Service Configuration Options 9
Authentication and Authorization Process for User Logins 10
Prerequisites for Remote AAA 11
Guidelines and Limitations for AAA 12
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Configuring AAA 12
Configuring Console Login Authentication Methods 12
Configuring Default Login Authentication Methods 13
Enabling Login Authentication Failure Messages 14
Logging Successful and Failed Login Attempts 15
Configuring AAA Command Authorization 16
Enabling MSCHAP Authentication 17
Configuring AAA Accounting Default Methods 18
Using AAA Server VSAs 20
VSAs 20
VSA Format 20
Specifying Switch User Roles and SNMPv3 Parameters on AAA Servers 20
Secure Login Enhancements 21
Secure Login Enhancements 21
Configuring Login Parameters 21
Configuration Examples for Login Parameters 22
Restricting Sessions Per User—Per User Per Login 23
Enabling the Password Prompt for User Name 24
Configuring Share Key Value for using RADIUS/TACACS+ 24
Monitoring and Clearing the Local AAA Accounting Log 25
Verifying the AAA Configuration 25
Configuration Examples for AAA 26
Default AAA Settings 26
CHAPTER 4 Configuring RADIUS 29
Information About RADIUS 29
RADIUS Network Environments 29
Information About RADIUS Operations 30
RADIUS Server Monitoring 31
Vendor-Specific Attributes 31
Prerequisites for RADIUS 32
Guidelines and Limitations for RADIUS 32
Configuring RADIUS Servers 32
Configuring RADIUS Server Hosts 33
Configuring RADIUS Global Preshared Keys 34
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Configuring RADIUS Server Preshared Keys 34
Configuring RADIUS Server Groups 35
Configuring the Global Source Interface for RADIUS Server Groups 37
Allowing Users to Specify a RADIUS Server at Login 37
Configuring the Global RADIUS Transmission Retry Count and Timeout Interval 38
Configuring Accounting and Authentication Attributes for RADIUS Servers 39
Configuring Periodic RADIUS Server Monitoring 40
Configuring the Dead-Time Interval 41
Manually Monitoring RADIUS Servers or Groups 42
Verifying the RADIUS Configuration 43
Displaying RADIUS Server Statistics 43
Clearing RADIUS Server Statistics 43
Configuration Examples for RADIUS 44
Default Settings for RADIUS 44
Feature History for RADIUS 44
CHAPTER 5 Configuring TACACS+ 45
Information About Configuring TACACS+ 45
TACACS+ Advantages 45
User Login with TACACS+ 46
Default TACACS+ Server Encryption Type and Preshared Key 46
TACACS+ Server Monitoring 47
Prerequisites for TACACS+ 47
Guidelines and Limitations for TACACS+ 48
Configuring TACACS+ 48
TACACS+ Server Configuration Process 48
Enabling TACACS+ 48
Configuring TACACS+ Server Hosts 49
Configuring TACACS+ Global Preshared Keys 50
Configuring TACACS+ Server Groups 51
Configuring the Global Source Interface for TACACS+ Server Groups 52
Configuring the Global TACACS+ Timeout Interval 52
Configuring the Timeout Interval for a Server 53
Configuring TCP Ports 53
Configuring Periodic TACACS+ Server Monitoring 54
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Configuring the Dead-Time Interval 55
Manually Monitoring TACACS+ Servers or Groups 56
Disabling TACACS+ 56
Displaying TACACS+ Statistics 57
Verifying the TACACS+ Configuration 57
Configuration Examples for TACACS+ 57
Default Settings for TACACS+ 58
CHAPTER 6 Configuring SSH and Telnet 59
Information About SSH and Telnet 59
SSH Server 59
SSH Client 59
SSH Server Keys 60
SSH Authentication Using Digital Certificates 60
Telnet Server 61
Guidelines and Limitations for SSH 61
Configuring SSH 61
Generating SSH Server Keys 61
Specifying the SSH Public Keys for User Accounts 62
Specifying the SSH Public Keys in Open SSH Format 62
Specifying the SSH Public Keys in IETF SECSH Format 63
Specifying the SSH Public Keys in PEM-Formatted Public Key Certificate Form 63
Configuring the SSH Source Interface 64
Starting SSH Sessions to Remote Devices 65
Clearing SSH Hosts 65
Disabling the SSH Server 65
Deleting SSH Server Keys 66
Clearing SSH Sessions 66
Configuration Examples for SSH 67
Configuring X.509v3 Certificate-Based SSH Authentication 68
Configuration Example for X.509v3 Certificate-Based SSH Authentication 70
Configuring Telnet 71
Enabling the Telnet Server 71
Reenabling the Telnet Server 71
Configuring the Telnet Source Interface 71
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Starting Telnet Sessions to Remote Devices 72
Clearing Telnet Sessions 72
Verifying the SSH and Telnet Configuration 73
Default Settings for SSH 73
CHAPTER 7 Configuring IP ACLs 75
Information About ACLs 75
IP ACL Types and Applications 76
Application Order 76
Rules 76
Source and Destination 77
Protocols 77
Implicit Rules 77
Additional Filtering Options 77
Sequence Numbers 77
Logical Operators and Logical Operation Units 78
ACL TCAM Regions 78
Licensing Requirements for ACLs 79
Prerequisites for ACLs 79
Guidelines and Limitations for ACLs 80
Default ACL Settings 80
ACL Logging 81
Configuring IP ACLs 81
Creating an IP ACL 81
Configuring IPv4 ACL Logging 82
Changing an IP ACL 84
Removing an IP ACL 85
Changing Sequence Numbers in an IP ACL 86
Applying an IP ACL to mgmt0 86
Applying an IP ACL as a Port ACL 87
Applying an IP ACL as a Router ACL 87
Verifying the ACL Logging Configuration 88
About System ACLs 89
Carving a TCAM Region 90
Configuring System ACLs 90
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Configuration and Show Command Examples for the System ACLs 90
Configuring ACL Logging 92
Configuring the ACL Logging Cache 92
Applying ACL Logging to an Interface 93
Applying the ACL Log Match Level 94
Clearing Log Files 94
Verifying the ACL Logging Configuration 94
Configuring ACL TCAM Region Sizes 95
Reverting to the Default TCAM Region Sizes 97
Configuring ACLs on Virtual Terminal Lines 97
Verifying ACLs on VTY Lines 99
Configuration Examples for ACLs on VTY Lines 99
CHAPTER 8 Configuring Unicast RPF 101
Information About Unicast RPF 101
Unicast RPF Process 102
Global Statistics 102
Licensing Requirements for Unicast RPF 103
Guidelines and Limitations for Unicast RPF 103
Default Settings for Unicast RPF 104
Configuring Unicast RPF 104
Configuration Examples for Unicast RPF 106
Verifying the Unicast RPF Configuration 106
Additional References for Unicast RPF 107
CHAPTER 9 Configuring Control Plane Policing 109
About CoPP 109
Control Plane Protection 110
Control Plane Packet Types 111
Classification for CoPP 111
Rate Controlling Mechanisms 112
Dynamic and Static CoPP ACLs 112
Default Policing Policies 113
Default Class Maps - For Cisco NX-OS Release 7.0(3)I3(1) 114
Strict Default CoPP Policy - For Cisco NX-OS Release 7.0(3)I3(1) 116
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Moderate Default CoPP Policy - For Cisco NX-OS Release 7.0(3)I3(1) 118
Lenient Default CoPP Policy - For Cisco NX-OS Release 7.0(3)I3(1) 120
Dense Default CoPP Policy - For Cisco NX-OS Release 7.0(3)I3(1) 122
Packets Per Second Credit Limit 124
Modular QoS Command-Line Interface 124
CoPP and the Management Interface 124
Licensing Requirements for CoPP 125
Guidelines and Limitations for CoPP 125
Default Settings for CoPP 127
Configuring CoPP 127
Configuring a Control Plane Class Map 127
Configuring a Control Plane Policy Map 129
Configuring the Control Plane Service Policy 131
Configuring the CoPP Scale Factor Per Line Card 132
Changing or Reapplying the Default CoPP Policy 133
Copying the CoPP Best Practice Policy 134
Verifying the CoPP Configuration 135
Displaying the CoPP Configuration Status 137
Monitoring CoPP 137
Clearing the CoPP Statistics 138
Configuration Examples for CoPP 138
CoPP Configuration Example 138
Changing or Reapplying the Default CoPP Policy Using the Setup Utility 139
Additional References for CoPP 140
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