Minimum Value. To specify the time, in ms , sec , or min , for a client to connect with the database server and provide the necessary authentication information. If the client fails to establish a connection and complete authentication in the time specified, then the database server terminates the connection.
The default value of this parameter is appropriate for typical usage scenarios. When specifying the values for these parameters, note the following recommendations:. It accepts different timeouts with or without space between the value and the unit. In case, no unit is mentioned, the default unit is sec. If clients are unable to complete connections within the specified time due to system or network delays that are normal for the particular environment, then increment the time as needed.
To specify whether password-based authentication is going to be attempted if Kerberos authentication fails. This is relevant for direct connections as well as database link connections. This option is supported for all operating systems with such a feature. The KDC maintains a list of user principals and is contacted through the kinit program for the user's initial ticket. It is the default configuration for Kerberos clients. To specify the directory for the Kerberos configuration file.
The parameter also specifies the file is created by the system, and not by the client. To specify the complete path name to the Kerberos realm translation file, which provides a mapping from a host name or domain name to a realm. To specify replay cache is stored in operating system-managed memory on the server, and that file-based replay cache is not used. To specify the time, in ms , sec , or min , for a client to establish an Oracle Net connection to the database instance.
If an Oracle Net connection is not established in the time specified, then the connect attempt is terminated. The outbound connect timeout interval is a superset of the TCP connect timeout interval, which specifies a limit on the time taken to establish a TCP connection. Additionally, the outbound connect timeout interval includes the time taken to be connected to an Oracle instance providing the requested service.
Without this parameter, a client connection request to the database server may block for the default TCP connect timeout duration 60 seconds when the database server host system is unreachable.
To turn accounting on and off. The default port is To specify the time for a database client or server to wait for data from the peer after establishing a connection. The peer must send some data within the time interval. You can specify the time in hours, minutes, seconds, or milliseconds by using the hr , min , sec , or ms keyword respectively.
If you do not specify a unit of measurement, then the default unit is sec. Setting this parameter for clients ensure that receive operation is not left in wait state indefinitely or for a long period due to an abnormal termination of server process or server busy state. If you choose to set the value, then set the value to an initial low value and adjust according to the system and network capacity. You can also set this parameter on the server-side to specify the time, in ms , sec , or min , for a server to wait for client data after connection establishment.
Without this parameter, the database server may continue to wait for data from clients that may be down or are experiencing difficulties. The server usually blocks on input from the client and gets these timeouts frequently if set to a low value. Any number greater than the minimum value of 1 ms up to ms. To specify the time for a database server to complete a send operation to clients after establishing a connection.
Setting this parameter is recommended for environments in which clients shut down occasionally or abnormally. Without this parameter, the database server may continue to send responses to clients that are unable to receive data due to a downed computer or a busy state. You can also set this parameter on the client-side to specify the time, in ms , sec , or min , 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 saturated with requests.
If you choose to set the value, then set the value to an initial low value and adjust according to system and network capacity. URI networking parameter of the sqlnet. You can use this parameter to customize URI for mapping the database websocket requests coming onto web server to the backend database server. Secure websocket handshaking requests are sent with this URI. This helps in accessing the public cloud database service as it eliminates the requirement to open an outbound port on a client side firewall.
To determine whether the client should override the strong authentication credential with the password credential in the stored wallet to log in to the database. When wallets are used for authentication, the database credentials for user name and password are securely stored in an Oracle wallet. The auto-login feature of the wallet is turned on so the database does not need a password to open the wallet.
From the wallet, the database gets the credentials to access the database for the user. Wallet usage can simplify large-scale deployments that rely on password credentials for connecting to databases. When this feature is configured, application code, batch jobs, and scripts do not need embedded user names and passwords. Risk is reduced because such passwords are no longer exposed in the clear, and password management policies are more easily enforced without changing application code whenever user names or passwords change.
This simplifies the maintenance of the scripts and secures the password management for the applications. Middle-tier applications create an Oracle Applications wallet at installation time to store the application's specific identity.
The password may be randomly generated rather than hardcoded. The new wallet-based password authentication code uses the password credential in the Oracle Applications wallet to log on to the database. In order to use wallets, a wallet must be configured on the client. Refer to Oracle Database Security Guide for additional information about configuring the clients.
Reject TLS connection if the certificate is revoked. If no appropriate CRL is found to determine the revocation status of the certificate and the certificate is not revoked, then accept the TLS connection. If no appropriate CRL is found to ascertain the revocation status of the certificate and the certificate is not revoked, then accept the TLS connection.
To enforce server-side certification validation through distinguished name DN matching. If you enforce the DN matching, in addition to verifying the server's certificate chain, the client performs another check through DN matching. There are two flavors of DN matching. Partial DN matching happens if the server's CN contains its host name. Complete DN matching happens against the server's complete DN. Not enforcing the match allows the server to potentially fake its identity.
In addition to the sqlnet. If the DN matches the service name, then the connection succeeds. If the DN does not match the service name, then the connection fails. If the DN does not match the service name, then the connection is successful, but an error is logged to the sqlnet. Clients and database servers must use a compatible version. This parameter should only be used when absolutely necessary for backward compatibility. The current default uses TLS version 1.
The following values are permitted:. If a TCP connection to the database host is not established in the specified time, then the connection attempt is terminated. The timeout applies to each IP address that resolves to a host name.
For example, if a host name resolves to an IPv6 and an IPv4 address, and if the host is not reachable through the network, then the connection request times out twice because there are two IP addresses.
In this example, the default timeout setting of 60 causes a timeout in seconds. This parameter is only valid when the TCP. To specify which clients are allowed access to the database. This list takes precedence over the TCP. To configure the maximum length of the queue for pending connections on a TCP listening socket.
To enable and disable valid node checking for incoming connections. If this parameter is set to yes , then incoming connections are allowed only if they originate from a node that conforms to list specified by TCP.
The TCP. This parameter and the depending parameters, TCP. Setting the parameter in the database home does not have any effect in Oracle RAC environments.
In VLAN environments, the sqlnet. Check these other pages for information on sqlnet. Check these pages for more information on creating and editing listener. Burleson is the American Team Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals. Feel free to ask questions on our Oracle forum. Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise.
All legitimate Oracle experts publish their Oracle qualifications. In that case you could use the OCI driver see here: docs. Justin Cave Justin Cave k 22 22 gold badges silver badges bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook.
Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science.
Stack Gives Back Featured on Meta. The difference of oracle instant client and the oracle client installed by Oracle Universal Installer is in how they are installed. The Oracle universal installer maintains a registry which the instant client does not have or use.
But the software components are the same independent of the method you use to install. If you use the jdbc oci driver then you use java to access the libraries of the Oracle OCI client which is the well known client that use all the clients that can use a tnsname. Access with the OCI client can be configured with tnsnames. In java there is a new way to access the Oracle database by using the jdbc thin client.
This is a client completely implemented in java that does not use the oracle OCI libraries but has implemented the necessary oracle net protocols in java to communicate with an Oracle database. This client cannot be influenced by tnsnames. It does not even need these files.
It only needs an appropriate jar file that implements the thin client. If you use the oci client for a program then in the environment that starts this program the Oracle relevaant variables must be set. So if a program is started by a shell script this shell script should set and export the relevant variables.
If this variable is not set then other directories are searched for these files or similar files. If no appropriate file is found default values are used. I figured it out. If everything is set when starting up the JVM, and you have a sqlnet.
0コメント