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DataStax Enterprise 6.8 Security Guide

    • About DSE Advanced Security
    • Security FAQs
    • Security checklists
    • Securing the environment
      • Securing ports
      • Securing the TMP directory
    • Authentication and authorization
      • Configuring authentication and authorization
        • About DSE Unified Authentication
          • Steps for new deployment
          • Steps for production environments
        • Configuring security keyspaces
        • Setting up Kerberos
          • Kerberos guidelines
          • Enabling JCE Unlimited
            • Removing AES-256
          • Preparing DSE nodes for Kerberos
            • DNS and NTP
            • krb5.conf
            • Principal
            • Keytab
        • Enabling authentication and authorization
          • Defining a Kerberos scheme
          • Defining an LDAP scheme
        • Configuring JMX authentication
        • Configuring cache settings
        • Securing schema information
      • Managing database access
        • About RBAC
        • Setting up logins and users
          • Adding a superuser login
          • Adding database users
          • LDAP users and groups
            • LDAP logins
            • LDAP groups
          • Kerberos principal logins
          • Setting up roles for applications
          • Binding a role to an authentication scheme
        • Assigning permissions
          • Database object permissions
            • Data resources
            • Functions and aggregate resources
            • Search indexes
            • Roles
            • Proxy login and execute
            • Authentication schemes
            • DSE Utilities (MBeans)
            • Analytic applications
            • Remote procedure calls
          • Separation of duties
          • Keyspaces and tables
          • Row Level Access Control (RLAC)
          • Search index permissions
          • DataStax Graph keyspace
          • Spark application permissions
          • DataStax Studio permissions
          • Remote procedure calls
          • DSE client-tool spark
          • JMX MBean permissions
          • Deny (denylist) db object permission
          • Restricting access to data
      • Providing credentials from DSE tools
        • About clients
        • Internal and LDAP authentication
          • Command line
          • File
          • Environment variables
          • Using CQLSH
        • Kerberos
          • JAAS configuration file location
          • Keytab
          • Ticket Cache
          • Spark jobs
          • SSTableLoader
          • Graph and gremlin-console
          • dsetool
          • CQLSH
        • Nodetool
        • JConsole
    • Auditing database activity
      • Enabling database auditing
      • Capturing DSE Search HTTP requests
      • Log formats
      • View events from DSE audit table
    • Transparent data encryption
      • About Transparent Data Encryption
      • Configuring local encryption
        • Setting up local encryption keys
        • Encrypting configuration file properties
        • Encrypting system resources
        • Encrypting tables
        • Rekeying existing data
        • Using tools with TDE-encrypted SSTables
        • Troubleshooting encryption key errors
      • Configuring KMIP encryption
      • Encrypting Search indexes
        • Encrypting new Search indexes
        • Encrypting existing Search indexes
        • Tuning encrypted Search indexes
      • Migrating encrypted tables from earlier versions
      • Bulk loading data between TDE-enabled clusters
    • Configuring SSL
      • Steps for configuring SSL
      • Creating SSL certificates, keystores, and truststores
        • Remote keystore provider
        • Local keystore files
      • Securing node-to-node connections
      • Securing client-to-node connections
        • Configuring JMX on the server side
        • nodetool, nodesync, dsetool, and Advanced Replication
        • JConsole (JMX)
        • SSTableloader
        • Connecting to SSL-enabled nodes using cqlsh
      • Enabling SSL encryption for DSEFS
      • Reference: SSL instruction variables
    • Securing Spark connections
  • DataStax Enterprise 6.8 Security Guide
  • Authentication and authorization
  • Configuring authentication and authorization
  • Setting up Kerberos
  • Preparing DSE nodes for Kerberos
  • Keytab

Creating a Kerberos Keytab File

Save the principal credentials in a keytab file to obtain credentials and authenticate without entering a password each time.

Procedure

  1. Create a keytab file for each node and add the principals keys for each node:

    kadmin: ktadd -k <keytabfilename> dse/<FQDN>
    kadmin: ktadd -k <keytabfilename> HTTP/<FQDN>

    where ktadd -k creates or appends a key for the DSE service and HTTP principals.

    Example:

    kadmin: ktadd -k /tmp/node1.keytab dse/node1.example.com
    kadmin: ktadd -k /tmp/node1.keytab HTTP/node1.example.com
    kadmin: ktadd -k /tmp/node2.keytab dse/node2.example.com
    kadmin: ktadd -k /tmp/node2.keytab HTTP/node2.example.com
  2. Use the klist command to view your principals in each keytab file:

    For example:

    sudo klist -e -kt /tmp/node1.keytab
    Keytab name: FILE:/tmp/node1.keytab
    KVNO Timestamp        Principal
    ---- ---------------- ----------------------------------------------
    2    14/02/16 22:03   HTTP/node1FQDN@YOUR_REALM (des3-cbc-sha1)
    2    14/02/16 22:03   HTTP/node1FQDN@YOUR_REALM (arcfour-hmac)
    2    14/02/16 22:03   HTTP/node1FQDN@YOUR_REALM (des-hmac-sha1)
    2    14/02/16 22:03   HTTP/node1FQDN@YOUR_REALM (des-cbc-md5)
    2    14/02/16 22:03   dse/node1FQDN@YOUR_REALM (des3-cbc-sha1)
    2    14/02/16 22:03   dse/node1FQDN@YOUR_REALM (arcfour-hmac)
    2    14/02/16 22:03   dse/node1FQDN@YOUR_REALM (des-hmac-sha1)
    2    14/02/16 22:03   dse/node1FQDN@YOUR_REALM (des-cbc-md5)

    where: -e displays the encryption type and -kt displays the keytab file and its timestamp.

  3. Distribute keytab files from the KDC server to the nodes. To ease DSE Kerberos configuration ensure the files have the same name on each node:

    scp /tmp/node1.keytab <node_admin>@<node_hostname>:/etc/dse/dse.keytab
  4. Change the permissions on dse.keytab so that only the dse_service_account user can read and write to the keytab file:

    sudo chown dse:dse /etc/dse/dse.keytab && sudo chmod 600 /etc/dse/dse.keytab
Principal Enabling authentication and authorization

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