When you access a Sybase 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 Sybase has tested
with Open Client security services, see the Open Client documentation.
ASE, SYC Sybase Adaptive Server Enterprise
Sec_Seq_Detection=value
Sec_Seq_Detection=0
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 11or higher to specify that your application should use the appropriate version of 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 “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 Sybase CT-Lib connection property named CS_SEC_DETECTSEQ.
To allow your security mechanism to detect and reject packets that arrive at the server out of sequence:
Database profile Select the Detect Sequence Errors check box on the Security page in the Database Profile Setup dialog box.
Application Type the following in code:
SQLCA.DBParm="Sec_Seq_Detection=1;Release=15"
