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Oracle® Database Net Services Administrator's Guide
11g Release 2 (11.2)

Part Number E10836-05
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12 Configuring Profiles

This chapter describes how to configure client and server configuration parameters in profiles. A profile is a collection of parameters that specifies preferences for enabling and configuring Oracle Net features on the client or database server. A profile is stored and implemented through the sqlnet.ora file.

This chapter contains the following topics:

Overview of Profile Configuration

You can use a profile to:

Configuring the Profile During Installation

Oracle Universal Installer launches Oracle Net Configuration Assistant after software installation on the client and server. Oracle Net Configuration Assistant configures the order of the naming methods that the computer uses to resolve a connect identifier to a connect descriptor

Configuration with the Oracle Net Configuration Assistant during installation results in an entry in the sqlnet.ora file similar to the following:

NAMES.DIRECTORY_PATH=(ezconnect,tnsnames)

NAMES.DIRECTORY_PATH specifies the priority order of the naming methods to use to resolve connect identifiers. If the installed configuration is not adequate, then use Oracle Net Manager to change the sqlnet.ora configuration.

Configuring Client Attributes for Names Resolution

The following sections describe available client configuration options:

Specifying a Default Domain for Clients

In environments where the client often requests names from a specific domain, it is appropriate to set a default domain in the client sqlnet.ora file with the NAMES.DEFAULT_DOMAIN parameter. This parameter is available to local and external naming methods.

When a default domain is set, it is automatically appended to any unqualified net service name given in the connect string, and then compared to net service names stored in a tnsnames.ora file.

For example, if the client tnsnames.ora file contains a net service name of sales.us.example.com, and the default domain is us.example.com, then the user can enter the following connect string:

CONNECT scott@sales
Enter password: password

In the preceding example, sales gets searched as sales.us.example.com.

If the connect string includes the domain extension, such as in CONNECT scott@sales.us.example.com, then the domain is not appended.

If a net service name in a tnsnames.ora file is not domain qualified and the NAMES.DEFAULT_DOMAIN parameter is set, then the net service name must be entered with a period (.) at the end of the name. For example, if the domain is set to us.example.com and the client tnsnames.ora file contains a net service name of sales2, then the user would enter the following connect string:

CONNECT scott@sales2.
Enter password: password

In the preceding example, the client would connect to sales2, not sales2.us.example.com.

The following procedure describes how to specify a default domain:

  1. Start Oracle Net Manager.

  2. In the navigator pane, select Profile from the Local menu.

  3. From the list in the right pane, select Naming.

  4. Click the Methods tab.

  5. In the Default Domain field, enter the domain.

  6. Select Save Network Configuration from the File menu.

    The sqlnet.ora file should contain an entry that looks similar to the following:

    NAMES.DEFAULT_DOMAIN=us.example.com
    

Prioritizing Naming Methods

After naming methods are configured, as described in Chapter 8, "Configuring Naming Methods", they must be prioritized. Naming methods to resolve a connect identifier are tried in the order they appear in the list. If the first naming method in the list cannot resolve the connect identifier, then the second method in the list is used, and so on.

The following procedure describes how to specify the order of naming methods:

  1. Start Oracle Net Manager.

  2. In the navigator pane, select Profile from the Local menu.

  3. From the list in the right pane, select Naming.

  4. Click the Methods tab.

    Table 12-1 describes the naming method values listed in the Methods tab.

    Table 12-1 Naming Method Values

    Naming Method Value Description

    TNSNAMES

    Resolve a net service name through the tnsnames.ora file on the client.

    See Also: "Configuring the Local Naming Method"

    LDAP

    Resolve a database service name, net service name, or net service alias through a directory server.

    See Also: "Configuring the Directory Naming Method"

    EZCONNECT

    Enable clients to use a TCP/IP connect identifier, consisting of a host name and optional port and service name, or resolve a host name alias through an existing names resolution service or centrally maintained set of /etc/hosts files.

    See Also: "Using the Easy Connect Naming Method"

    NIS

    Resolve service information through an existing network information service (NIS).


  5. Select naming methods from the Available Methods list, and then click the right-arrow button.

    The selected naming methods move to the Selected Methods list.

  6. Order the naming methods according to the order in which you want Oracle Net to try to resolve the net service name or database service name. Select a naming method in the Selected Methods list, and then click Promote or Demote to move the selection up or down in the list.

  7. Select Save Network Configuration from the File menu.

    The sqlnet.ora file updates with the NAMES.DIRECTORY_PATH parameter:

    NAMES.DIRECTORY_PATH=(ldap, tnsnames)
    

Routing Connection Requests to a Process

Clients and servers can be configured so connection requests are directed to a specific process. The following procedure describes how to route connection requests to a process:

  1. Start Oracle Net Manager.

  2. In the navigator pane, select Profile from the Local menu.

  3. From the list in the right pane, select General.

  4. Click the Routing tab.

  5. Select the preferred way for routing connections.

    Note:

    To configure all connections to use a particular server, you select the Always Use Dedicated Server option in Oracle Net Manager. This sets the USE_DEDICATED_SERVER parameter in the sqlnet.ora file to force the listener to spawn a dedicated server for all network sessions from the client. The result is a dedicated server connection, even if a shared server is configured.
  6. Choose File > Save Network Configuration.

See Also:

Table 12-3, "Advanced Settings in sqlnet.ora" for a description of the fields and options

Configuring Database Access Control

You can configure the sqlnet.ora file to allow access to some clients and deny access to others. Table 12-2 describes the available settings.

Table 12-2 Access Control Settings in sqlnet.ora

Oracle Net Manager Field/Option sqlnet.ora File Parameter Description

Check TCP/IP client access rights

TCP.VALIDNODE_CHECKING

Specify whether to screen access to the database.

If this field is selected, then Oracle Net Manager checks the parameters TCP.EXCLUDED_NODES and TCP.VALIDNODE_CHECKING to determine which clients to allow access to the database. If this field is deselected, then Oracle Net Manager does not screen clients.

Clients denied access

TCP.EXCLUDED_NODES

Specify which clients using the TCP/IP protocol are denied access to the database.

Clients allowed access

TCP.INVITED_NODES

Specify which clients using the TCP/IP protocol are allowed access to the database.


If the TCP.INVITED_NODES parameter does not include the listener node, then the Listener Control utility cannot connect to the listener. This will prevent start, stop and administration commands from being performed on the listener.

If there are invalid host names or IP addresses listed in the TCP.INVITED_NODES parameter or the TCP.EXCLUDED_NODES parameter, then the Listener Control utility cannot contact the listener.

The following procedure describes how to configure database access control:

  1. Start Oracle Net Manager.

  1. In the navigator pane, select Profile from the Local menu.

  2. From the list in the right pane, select General.

  3. Click the Access Rights tab.

  4. Select the Check TCP/IP client access rights option.

  5. In the Clients allowed to access fields and Clients excluded from access, enter either a host name or an IP address for a client that you want to include or exclude, using commas to delimit entries placed on the same line.

Configuring Advanced Profile Information

Table 12-3 describes the advanced sqlnet.ora file settings that you can set.

Table 12-3 Advanced Settings in sqlnet.ora

Oracle Net Manager Field/Option sqlnet.ora File Parameter Description

Send operation Time Out

SQLNET.SEND_TIMEOUT

Specify the time, in seconds, for a database server to complete a send operation to clients to complete after connection establishment.

Setting this parameter is recommended for environments in which clients shut down on occasion or abnormally. If the database server cannot complete a send operation in the time specified, then it logs ORA-12535: TNS:operation timed out and ORA-12608: TNS: Send timeout occurred errors in the sqlnet.log file.

Without this parameter, the database server continues to send responses to clients that are unable to receive data.

You can also set this parameter on the client side to specify the time, in seconds, for a client to complete send operations to the database server after connection establishment. Without this parameter, the client may continue to send requests to a database server already overwhelmed with requests.

Receive operation Time Out

SQLNET.RECV_TIMEOUT

Specify the time, in seconds, for a database server to wait for client data after connection establishment. A client must send some data within the specified time interval.

Setting this parameter is recommended for environments in which clients shut down on occasion or abnormally. If a client does not send any data in the time specified, then the database server logs ORA-12535: TNS:operation timed out and ORA-12609: TNS: Receive timeout occurred errors to the sqlnet.log file.

Without this parameter, the database server continues to wait for data from clients that may be down or are experiencing difficulties.

You can also use this setting on the client side to specify the time, in seconds, for a client to wait for response data from the database server after connection establishment. Without this parameter, the client may wait for a long period of time for a response from a database server overwhelmed with requests.

Connection Time Out

SQLNET.INBOUND_CONNECT_TIMEOUT

Specify the time, in seconds, for a client to connect with the database server and provide the necessary authentication information.

Total Send Buffer Size

SEND_BUF_SIZE

Specify the buffer space limit for send operations of sessions.

Total Receive Buffer Size

RECV_BUF_SIZE

Specify the buffer space limit for receive operations of sessions.

TNS Time Out Value

SQLNET.EXPIRE_TIME

Specify the time interval, in minutes, to send a probe to verify that client/server connections are active. Setting a value greater than 0 ensures that connections are not left open indefinitely, due to an abnormal client termination. If the probe finds a terminated connection, or a connection that is no longer in use, then it returns an error, causing the server process to exit. This setting is intended for the database server, which typically handles multiple connections at any one time.

Limitations on using this terminated connection detection feature are:

  • It is not allowed on bequeathed connections.

  • Though very small, a probe packet generates additional traffic that may downgrade network performance.

  • Depending on which operating system is in use, the server may need to perform additional processing to distinguish the connection probing event from other events that occur. This can also result in downgrading network performance.

Client Registration ID

SQLNET.CLIENT_REGISTRATION

Specify a unique identifier for a client. This identifier is passed to the listener with any connection request. The identifier can be any string up to 128 characters long.

Logon Authentication Protocol Version

SQLNET.ALLOWED_LOGON_VERSION

Define the minimum Oracle Database client release that is allowed to attempt connections to database instances under the control of the given code tree. Each connection attempt is tested. If the client or server does not meet the minimum release specified by its partner, then authentication fails with an ORA-28040 error.

Supported values include:

  • 11 for Oracle Database 11g authentication protocols (recommended for strongest protection)

  • 10 for Oracle Database 10g authentication protocols

  • 9 for Oracle9i authentication protocols

  • 8 for Oracle8i authentication protocols

The default value is 8. Note the following implications of setting the value to 11:

  • To take advantage of the password protections introduced in Oracle Database 11g, users must change their passwords.

  • Releases of OCI clients before Oracle Database 10g and all versions of JDBC thin clients cannot authenticate to the Oracle database using password-based authentication.

Turn Off UNIX Signal Handling

BEQUEATH_DETACH

Turn on or off UNIX signal handling.

Because the client application spawns a server process internally through the Bequeath protocol as a child process, then the client application becomes responsible for cleaning up the child process when it completes. When the server process completes its connection responsibilities, it becomes a terminated process. Signal handlers are responsible for cleaning up these terminated processes. Setting this parameter configures the client profile to pass this process to the UNIX initialization process by disabling signal handlers.

Disable Out-of-Band Break

DISABLE_OOB

Turn on or off out-of-band breaks.

If deselected or set to off, then Oracle Net can send and receive break messages using urgent data requests provided by the underlying protocol. Once enabled, this feature applies to all protocols used by this client.

If selected or set to on, then it disables the ability to send and receive break messages using urgent data requests of the underlying protocol.


See Also:

The following procedure describes how to set advanced features in the sqlnet.ora file:

  1. Start Oracle Net Manager.

  2. In the navigator pane, select Profile from the Local menu.

  3. From the list in the right pane, select General.

  4. Click the Advanced tab.

  5. Enter the values for the fields or options you want to set.

  6. Select Save Network Configuration from the File menu.

Configuring External Naming Methods

The sqlnet.ora file is used to configure required client parameters needed for Network Information Service (NIS) external naming. The following procedure describes how to configure the NIS parameter in the sqlnet.ora file:

  1. Start Oracle Net Manager.

  2. In the navigator pane, select Profile from the File menu.

  3. From the list in the right pane, select Naming.

  4. Click the External tab.

  5. Select Save Network Configuration from the File menu.

Configuring Oracle Advanced Security

Oracle Advanced Security enables data encryption and integrity checking, enhanced authentication, and single sign-on. Oracle Advanced Security also provides centralized user management on LDAP-compliant directory servers and certificate-based single sign-on. This functionality relies on the Secure Sockets Layer (SSL).

The following procedure describes how to configure a client or server to use Oracle Advanced Security features:

  1. Start Oracle Net Manager.

  2. In the navigator pane, select Profile from the Local menu.

  3. From the list in the right pane, select Oracle Advanced Security.

    Each Oracle Advanced Security tab page enables you to configure a separate set of parameters.

  4. Select or edit options as applicable.

  5. Select Save Network Configuration from the File menu.

See Also:

  • Choose the Help button on the particular tab page

  • Oracle Advanced Security procedural topics in the Oracle Net Manager online help. To access these topics in the online help, select Oracle Advanced Security, and then select the How To option

  • Oracle Database Advanced Security Administrator's Guide for additional information about configuration