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System Administration Guide: Security Services     Oracle Solaris 10 8/11 Information Library
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Document Information


Part I Security Overview

1.  Security Services (Overview)

Part II System, File, and Device Security

2.  Managing Machine Security (Overview)

3.  Controlling Access to Systems (Tasks)

4.  Controlling Access to Devices (Tasks)

5.  Using the Basic Audit Reporting Tool (Tasks)

6.  Controlling Access to Files (Tasks)

7.  Using the Automated Security Enhancement Tool (Tasks)

Part III Roles, Rights Profiles, and Privileges

8.  Using Roles and Privileges (Overview)

9.  Using Role-Based Access Control (Tasks)

10.  Role-Based Access Control (Reference)

11.  Privileges (Tasks)

12.  Privileges (Reference)

Part IV Cryptographic Services

13.  Oracle Solaris Cryptographic Framework (Overview)

14.  Oracle Solaris Cryptographic Framework (Tasks)

15.  Oracle Solaris Key Management Framework

Part V Authentication Services and Secure Communication

16.  Using Authentication Services (Tasks)

17.  Using PAM

18.  Using SASL

19.  Using Oracle Solaris Secure Shell (Tasks)

20.  Oracle Solaris Secure Shell (Reference)

Part VI Kerberos Service

21.  Introduction to the Kerberos Service

22.  Planning for the Kerberos Service

Why Plan for Kerberos Deployments?

Planning Kerberos Realms

Realm Names

Number of Realms

Realm Hierarchy

Mapping Host Names Onto Realms

Client and Service Principal Names

Ports for the KDC and Admin Services

The Number of Slave KDCs

Mapping GSS Credentials to UNIX Credentials

Automatic User Migration to a Kerberos Realm

Which Database Propagation System to Use

Clock Synchronization Within a Realm

Client Configuration Options

Improving Client Login Security

KDC Configuration Options

Kerberos Encryption Types

Online Help URL in the Graphical Kerberos Administration Tool

23.  Configuring the Kerberos Service (Tasks)

24.  Kerberos Error Messages and Troubleshooting

25.  Administering Kerberos Principals and Policies (Tasks)

26.  Using Kerberos Applications (Tasks)

27.  The Kerberos Service (Reference)

Part VII Oracle Solaris Auditing

28.  Oracle Solaris Auditing (Overview)

29.  Planning for Oracle Solaris Auditing

30.  Managing Oracle Solaris Auditing (Tasks)

31.  Oracle Solaris Auditing (Reference)



Clock Synchronization Within a Realm

All hosts that participate in the Kerberos authentication system must have their internal clocks synchronized within a specified maximum amount of time. Known as clock skew, this feature provides another Kerberos security check. If the clock skew is exceeded between any of the participating hosts, requests are rejected.

One way to synchronize all the clocks is to use the Network Time Protocol (NTP) software. See Synchronizing Clocks Between KDCs and Kerberos Clients for more information. Other ways of synchronizing the clocks are available, so the use of NTP is not required. However, some form of synchronization should be used to prevent access failures because of clock skew.