HP UX Kerberos Data Security Software manual Authentication Process

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Overview

Authentication Process

Authentication Process

To aid you in understanding the conﬁguration and administration issues this section describes the authentication process. The process of Conﬁguring and Administering your Kerberos Server have been discussed in detail in the subsequent chapters of this manual.

Before the Kerberos Server grants tickets to a user principal to access secured network services, a user must sign on to the Server by providing knowledge of secret information, such as a user name and password.

Once the server authenticates the user, it returns a set of initial credentials for the user, consisting of a ticket-granting-ticket(TGT) and a session key.

A service ticket is granted for a speciﬁc service principal, which can be associated with one or more Kerberos-secured services on the same system. The service ticket is used by a client application on behalf of the user, to authenticate the user to the Kerberos-secured network service. The secured client application automatically handles the transactions with the Server and the secured application server. Service tickets and associated session keys are generally cached in the user’s credentials cache along with the user’s TGT.

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Contents Manufacturing Part Number T1417-90003 E0602 EditionLegal Notices Page Page Contents Administration Contents Contents Inter-realm Troubleshooting Glossary Index Contents Tables Tables Figures Figures Preface Related Documentation Accessing the World Wide WebAudience Related Software ProductsRelated Request for Comments RFCs Width ConventionsUsing This Manual Glossary Index Overview Chapter Overview How The Kerberos Server Works Conﬁguring and Administering the Kerberos Server on HP-UX Authentication Process Step Authentication ProcessTGT Authentication Process Authentication Process Is added to the database. The krbtgt/REALM NAMEprincipal DES vs 3DES Key Type SettingsMust be assigned a key type or default keys issued by Krbtgt/REALM Name is the ticket-granting principal. This isInstallation Installation Before Installing The Kerberos Server Hardware Requirements Software Requirements Installing The Kerberos Server With SD-UX Installing The Kerberos Server Chapter Migration Migration Policy Migration on Step-wise Procedure For Migration on Policy Migration Step-wise Procedure For Migration For version 2.0 of the Kerberos Server, as described in Step On successful completion the following message is displayed Step-wise Procedure For Migration Chapter Interoperability With Windows Interoperability With Windows Chapter Overview Understanding the Terminology Understanding the Terminology Table of Analogous Terms HP’s Kerberos Server Windows Table of Analogous TermsCase HP’s Kerberos Server and Windows 2000 InteroperabilityEstablishing Trust Between HP’s Kerberos Servers and Windows Single Realm Domain Authentication Inter-Realm Inter-Domain Authentication Postdated Tickets Special Considerations for InteroperabilityDatabase Considerations Encryption ConsiderationsSpecial Considerations for Interoperability Chapter Conﬁguration Conﬁguration Conﬁguration Files For The Kerberos Server Security Server Files That Require ConﬁgurationFile Auto-Conﬁguration of the Security Server Auto-Conﬁguration of the Security Server Return to the main menu Editing the Conﬁguration Files Manual Conﬁguration Of The Kerberos ServerManual Conﬁguration Of The Kerberos Server Krb.conf Format Krb.confRealm Sample krb.conf File Reference Krb.realms Krb.realms Format Krb.realms Sample krb.realms Sample krb.realms Chapter Conﬁguring The Primary Server Creating The Principal Database After Installation Add An Administrative Principal To add an administrative principal usingAdministrator Run Command-Line-Administrator,kadmin Create The host/fqdn principal And Extract Its Service Key Start the Kerberos daemons Deﬁne Secondary Server Network Locations Password Policy File AdminaclﬁleSecurity Policies Starting the Security Server Summary Sbin/initd/krbsrv start Conﬁguring The Secondary Security Servers Create the Principal DatabaseCopy the Kerberos Conﬁguration File Create a host/fqdn Principal and Extract Its Key Administration Administration Administering the Kerberos Database Kadmind Adminaclﬁle Assigning Administrative Permissions List prinicpal. This is redundant with i or Adding Entries to the adminaclﬁle Creating Administrative Accounts Using Restricted AdminsitratorHow the r/R Modiﬁers Work 100 Password Policy setting Default Password Policy FileEditing the Default File Default Password Policy Settings for the base group102 Principals 104 Adding User Principals Adding New Service PrincipalsReserved Service Principals Chapter 107 Do not remove or modify this principal entry Removing User Principals Remove Special Privilege SettingsProtecting Secret Keys Removing Service Principals Administration Tools Kadmin Vs kadminlAdministration Tools Tool Name Tool Description Administrator Apply Standard Functionality of the AdministratorUsage of kadminlui Local Administrator kadminluiChapter 117 Principals Tab Principals TabChapter 119 General Tab Principal Information Window General Tab Principal Information windowChapter 121 To add a principal Adding Principals to the DatabaseTo simultaneously add multiple principals with Same settingsTo create an administrative principal Creating an Administrative PrincipalChapter 125 Finding a Principal To search for a principalSearch Criteria Chapter 127 128 To delete a user principal Deleting a PrincipalTo reload the default values for a principal Loading Default Values for a PrincipalRestoring Previously Saved Values for a Principal To restore previously saved values for a principalTo change ticket information Changing Ticket InformationChapter 133 Example Rules for Setting Maximum Ticket LifetimeExamples Rules for Setting Maximum Renew TimeTo change the password information Changing Password InformationPassword at their next logon A principal’s password. You must inform the principalPassword Tab Principal Information Password Tab Principal Information WindowWindow Chapter 139 Change Password Window Password Tab Change Password window Password tabChapter 141 To change a DES principal’s key type to 3DES Changing Key TypesChapter 143 To change principal attributes Changing Principal AttributesAttributes Tab Principal Information Window Attributes Tab Principal Information146 Chapter 147 148 Chapter 149 To delete a service principal Deleting a Service PrincipalTo securely extract principal keys to the service key Extracting Service Keys152 Extract Service Key Table Window Extract Service Key Table window154 To edit the default group Using Groups to Control SettingsGroup Information window Principal Group Information Window Setting the Default Group Principal Attributes Default Principal AttributesPrincipal Attributes To set administrative permissions Setting Administrative PermissionsAdministrative Permissions Administrative PermissionsChapter 161 162 Realms Tab Realms Tab10 Realm Information Window Realms Tab Realm Information window Realms tabTo add a realm Adding a RealmTo delete a realm Deleting a RealmRemote Administrator kadminui 168 Administration Manual Administration Using kadmin Chapter 171 Add Random Key Add a New PrincipalSpecify New Password Change Password to a New Randomly Generated PasswordDelete a Principal Extract a Principal Modifying a Principal List the Attributes of a PrincipalNumber of Authentication failures fcnt To modify the principal admin, you need to do the followingAttributes Key Version Number AttributeAllow Renewable Attribute Allow Postdated AttributeAllow Forwardable Attribute Allow Proxy Attribute Allow Duplicate Session Key Attribute Require Preauthentication AttributeRequire Password Change Attribute Lock Principal Attribute Allow as Service AttributeFollowing Require Initial Authentication AttributeTgtbased Authentication Set As Password Change Service AttributePassword Expiration Attribute Maximum Ticket Lifetime Attribute Principal Expiration AttributeMaximum Renew Time Attribute Key Type AttributeSalt Type Attribute Chapter 189 Principal Database Utilities If you want to Use This Tool Principal Database UtilitiesCreating the Kerberos Database 192 Database Encryption Database Master Password Destroying the Kerberos Database Dumping the Kerberos Database Loading the Kerberos Database Stashing the Master Key Chapter 199 Services Situation Daemons and Services Starting and Stopping DaemonsSituations that require Starting and Stopping Daemons Host/fqdn@REALM Maintenance TasksMaster Password Protecting Security Server SecretsSpecial Note on Backing up the Principal Database Backing Up Primary Server DataChapter 203 Removing Unused Space From the Database Chapter 205 206 Propagation 208 Propagation Relationships Propagation HierarchyService Key Table v5srvtab Extracting a Key to the Service Key Table FileMaintaining Secret Keys In The Key Table File Deleting Older Keys From the Service Key Table File Creating a New Service Key Table FilePropagation Tools If You Want To Use This Tool Propagation ToolsChapter 213 Kpropd Mkpropcf 216 Kpropd.ini Sections Defaultvalues sectionChapter 219 Secsrvname Section All servers contain the following entries Examples222 Prpadmin Setting Up Propagation Chapter 225 226 Chapter 227 228 Critical Error Messages Monitoring PropagationMonitoring the Log File Monitoring for Old File Date and Large File Size Monitoring Propagation Queue FilesComparing the Database to its Copies Principal.ok Time Stamp Does Not UpdateAdministration Appears Normal Authentication Problems OccurKdbdump Log Files Indicate ProblemsAuthentication Tests Succeed Number of Principals Does Not MatchRestarting Propagation Using the Simple Process Propagation Failure Restarting Propagation Using the Full Dump MethodConverting a Secondary Server to a Primary Server Cleaning the Temp Directory Restarting Services238 Conﬁguring for Multi-realm Enterprises Number of Realms per DatabasePrimary Servers That Support Multiple Realms Multiple Primary Servers That Support a Single Realm Adding More Realms to a Multi-realm DatabaseDatabase Propagation for Multi-realm Databases To Conﬁgure a propagation in a multi-realm environment 242 Inter-realm 244 Considering Trust Relationships One-way TrustTwo-way Trust Other Types Of Trust Hierarchical TrustChapter 247 248 Chapter 249 Conﬁguring Direct Trust Relationships Direct Trust Relationship Example Hierarchical Inter-realm Trust Hierarchical Chain of TrustHierarchical Inter-realm Example Hierarchical Inter-realm Conﬁguration 254 Chapter 255 256 Chapter 257 258 Troubleshooting 260 Chapter 261 Characterizing the Problem Chapter 263 Diagnostic Tools Diagnostic Tools SummaryTroubleshooting Kerberos Error MessagesLogging Capabilities Unix Syslog File Services ChecklistTroubleshooting Techniques Table of Errors Messages Chapter 269 270 General Errors Forgotten PasswordsLocking and Unlocking Accounts Clock Synchronization Decrypt integrity check failed Typical User Error MessagesAction Administrative Error MessagesPassword has expired while getting initial ticket Service key not available while getting initial ticketChapter 275 Reporting Problems to Your Hewlett-Packard Support Contact Chapter 277 278 Glossary Glossary Glossary 281 Ticket-granting-ticket Index Symbols284 285

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