Description
When you access an SAP Adaptive Server Enterprise database in PowerBuilder through Open Client, Sec_Seq_Detection is one of several parameters that support per-packet security for network-based security services. (For other per-packet security parameters, see the See Also section.)
Sec_Seq_Detection controls whether your connection's security mechanism can detect and reject transmitted packets that arrive at the server in a different order than was originally sent from the client. When Sec_Seq_Detection is set to 1, the security mechanism detects and rejects packets that arrive at the server out of sequence.
When Sec_Seq_Detection is set to 0 (the default), the security mechanism cannot detect packets that arrive at the server out of sequence.
You must specify a value for Sec_Seq_Detection before connecting to the database in PowerBuilder.
Using third-party security mechanisms
For information about the third-party security mechanisms and operating system platforms that has been tested with Open Client security services, see the Open Client documentation.
Applies to
ASE, SYC SAP Adaptive Server Enterprise
Syntax
Sec_Seq_Detection=value
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Parameter |
Description |
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value |
Specifies whether your connection's security mechanism can detect and reject packets that arrive at the server in a different order than the one in which they were sent from the client. Values are:
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Default value
Sec_Seq_Detection=0
Usage
When to use
When transmitting data over a network, commands sent to a server might arrive out of sequence. For example, if packets are sent from the client to the server in the order P1, P2, P3 and the server receives the packets in the order P1, P3, P2, this is considered an out-of-sequence error.
Setting Sec_Seq_Detection to 1 ensures that your security mechanism can detect and subsequently reject packets that arrive at the server out of sequence.
Set Release parameter
For this parameter to take effect, you must also set the Release parameter to 11 or higher to specify that your application should use the appropriate version of SAP Sybase Open Client Client-Library (CT-Lib) behavior. See the description of the Release parameter for more information.
Requirements for use
To use Sec_Seq_Detection or any other parameter supporting Open Client security services, you must meet certain requirements for using security services in your PowerBuilder application. For details, see the section called “Requirements for using Open Client security services” in Connecting to Your Database.
Corresponding CT-Lib connection property
Specifying a value for Sec_Seq_Detection sets the corresponding SAP Sybase CT-Lib connection property named CS_SEC_DETECTSEQ.
Examples
To allow your security mechanism to detect and reject packets that arrive at the server out of sequence:
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Database profile
Select the Detect Sequence Errors check box on the Security page in the Database Profile Setup dialog box.
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Application
Type the following in code:
SQLCA.DBParm="Sec_Seq_Detection=1;Release=15"
See also
