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One Identity Safeguard for Privileged Sessions 6.2.0 - Administration Guide

Preface Introduction The concepts of One Identity Safeguard for Privileged Sessions (SPS) The Welcome Wizard and the first login Basic settings
Supported web browsers and operating systems The structure of the web interface Network settings Configuring date and time System logging, SNMP and e-mail alerts Configuring system monitoring on SPS Data and configuration backups Archiving and cleanup Forwarding data to third-party systems Joining to One Identity Starling
User management and access control Managing One Identity Safeguard for Privileged Sessions (SPS)
Controlling One Identity Safeguard for Privileged Sessions (SPS): reboot, shutdown Managing Safeguard for Privileged Sessions (SPS) clusters Managing a High Availability One Identity Safeguard for Privileged Sessions (SPS) cluster Upgrading One Identity Safeguard for Privileged Sessions (SPS) Managing the One Identity Safeguard for Privileged Sessions (SPS) license Accessing the One Identity Safeguard for Privileged Sessions (SPS) console Sealed mode Out-of-band management of One Identity Safeguard for Privileged Sessions (SPS) Managing the certificates used on One Identity Safeguard for Privileged Sessions (SPS)
General connection settings HTTP-specific settings ICA-specific settings RDP-specific settings SSH-specific settings Telnet-specific settings VMware Horizon View connections VNC-specific settings Indexing audit trails Using the Search interface Advanced authentication and authorization techniques Reports The One Identity Safeguard for Privileged Sessions (SPS) RPC API The One Identity Safeguard for Privileged Sessions (SPS) REST API One Identity Safeguard for Privileged Sessions (SPS) scenarios Troubleshooting One Identity Safeguard for Privileged Sessions (SPS) Using SPS with SPP Configuring external devices Using SCP with agent-forwarding Security checklist for configuring One Identity Safeguard for Privileged Sessions (SPS) Jumplists for in-product help LDAP user and group resolution in SPS

Local client-side authentication

The following describes how to perform authentication locally on One Identity Safeguard for Privileged Sessions (SPS) for client-side connections.

NOTE:

The users can be authenticated to their passwords or public-keys uploaded to SPS.

The accounts created to access the SPS web interface cannot be used to authenticate SSH connections.

Prerequisites

To perform authentication locally on SPS for client-side connections, an existing Local User Database is needed. To create a Local User Database, complete the following procedure: Creating a Local User Database.

To perform authentication locally on SPS for client-side connections

  1. Navigate to SSH Control > Authentication Policies, and select the authentication policy to modify.

  2. Select the permitted authentication methods (Password, Public key).
  3. Select Local user database.

  4. Select the Local user database from the list that defines the users who can access the server.

  5. Click Commit.

Relayed authentication methods

For the server-side connection (between One Identity Safeguard for Privileged Sessions (SPS) and the target server), the following authentication methods are available.

NOTE:

Even though these settings refer to the server-side connection, the client must support the selected authentication method and have it enabled. For example, to use publickey authentication on the server side, the client must support publickey authentication as well as provide a fake publickey, even if a different authentication method is used on the client side.

The Connection Policy will ignore the settings for server-side authentication (set under Relayed authentication methods) if a Credential Store is used in the Connection Policy.

Figure 194: SSH Control > Authentication Policies — Configuring relayed authentication methods

  • Password: Authentication based on username and password. The server will request a password from the user, even if a password-based authentication was already successful on the client-side.

  • Keyboard-Interactive: Authentication based on exchanging messages between the user and the server. This method includes authentication schemes like S/Key or TIS authentication. Note that depending on the configuration of the SSH server, password-based authentication can also require using the keyboard-interactive authentication method.

  • Public Key: Authentication based on public-private encryption keypairs. SPS supports the following public-key authentication scenarios:

    • Publish to LDAP: SPS generates a keypair, and uses this keypair in the server-side connection. The public key of this keypair is also uploaded to the LDAP database set in the LDAP Server of the connection policy. That way the server can authenticate the client to the generated public key stored under the user's username in the LDAP database.

    • Fix: Uses the specified private key in the server-side connection.

    • Agent: Allow the client to use agent-forwarding, and use its own keypair on the server-side.

      If this option is used, SPS requests the client to use its SSH agent to authenticate on the target server. Therefore, you must configure your clients to enable agent forwarding, otherwise authentication will fail. For details on enabling agent forwarding in your SSH application, see the documentation of the application.

    One Identity recommends using 2048-bit RSA keys (or stronger).

  • Kerberos: Authentication based on Kerberos. Only available if you selected Kerberos as the gateway authentication method. For more information, see Kerberos authentication settings.

Configuring your Kerberos environment

To integrate One Identity Safeguard for Privileged Sessions (SPS) with your Kerberos environment, so that your clients can authenticate on the target servers using Kerberos tickets, you have to configure your environment appropriately.

To configure your Kerberos environment

  1. Configure your DNS server.

    1. On your Domain Name Server (DNS), add SRV records that describe which Key Distribution Center (KDC) belongs to the domain. Add both TCP and UDP entries for each domain. For example, if your domain is example.com and the hostname of your KDC server is kdc.example.com, this entry looks like:

      _kerberos_tcp_example.com 0 0 88 kdc.example.com
      _kerberos_udp_example.com 0 0 88 kdc.example.com
    2. If your environment uses multiple realms, repeat the previous step for every realm.

    3. Verify that the servers that your clients will connect to via SPS have proper reverse-dns entries. Otherwise, your clients cannot access the target servers if you use the Inband destination selection feature of SPS.

  2. Create a keytab file for SPS.

    1. On your KDC server, create a principal for the SPS host, using the domain name of your SPS. For example:

      host/scb.example.com@EXAMPLE.COM
    2. If your environment uses multiple realms, repeat the previous step on the KDC of every realm.

    3. Export the key of the principal into a keytab file.

    4. If your environment uses multiple realms, merge the keytab files of the different realms into a single file, for example, using the ktadd or the ktutil utilities.

    5. If your environment uses multiple realms, repeat the previous step on the KDC of every realm.

  3. Configure the SSH application of your client hosts to enable Kerberos (GSSAPI) ticket forwarding. (In most applications this is disabled by default.)

Expected result

You have configured your environment to use Kerberos authentication with SPS, and created a keytab file for your SPS host. For details on uploading the keytab file and configuring SPS see Kerberos authentication settings.

Kerberos authentication settings

The following describes how to perform authentication with Kerberos. One Identity Safeguard for Privileged Sessions (SPS) supports both end-to-end Kerberos authentication, when the client authenticates on SPS gateway and on the target server using Kerberos, and also the half-sided Kerberos scenario when Kerberos is used only on the SPS gateway.

Prerequisites

Before configuring Kerberos authentication on One Identity Safeguard for Privileged Sessions (SPS), make sure you have configured your Kerberos environment correctly and have retrieved the keytab file. For details, see Configuring your Kerberos environment.

To perform authentication with Kerberos

  1. Navigate to SSH Control > Authentication Policies.

  2. Create a new Authentication Policy.

  3. Select the authentication methods to use on the SPS gateway and on the target server.

    • To use Kerberos authentication on the target server, you must use Kerberos authentication both on the SPS gateway and on the target server. Select Gateway authentication method > Kerberos and Relayed authentication methods > Kerberos.

    • To use Kerberos authentication only on the SPS gateway (that is, in the client-side connection), select Gateway authentication method > Kerberos. If required, you can select other gateway authentication methods in addition to Kerberos, and also authentication backends and related to the selected gateway authentication methods.

      Select the authentication methods you want to use on the target server in the Relayed authentication methods field.

  4. Click Commit.

  5. Navigate to SSH Control > Global Options > GSSAPI.

  6. Browse for the Kerberos keytab file, and click Upload. The uploaded principals are displayed in Currently uploaded principals.

    If a Connection Policy uses an SSH Authentication Policy with Kerberos authentication together with a Usermapping Policy, then SPS stores the user principal as the gateway user, and the target username as the server username in the session database. If you want to allow your users to use a username on the target server that is different from their principal, configure a Usermapping Policy for your SSH connections. For details, see "Configuring usermapping policies" in the Administration Guide.

    Click Commit.

  7. (Optional) If more than one realm is deployed on your network, you have to specify the mapping from the server's DNS domain name to the name of its realm. To map hostnames onto Kerberos realms, click .

  8. Navigate to SSH Control > Connections and configure the SSH connection as follows. For details on configuring connections in general, see Configuring connections.

    1. Select Use fixed address or Inband destination selection as Target.

    2. Select the Kerberos Authentication policy.

    3. Click Commit.

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