If you want to suppress a specific syslog message to be sent to syslog server, then you must enter the command as shown.

hostname(config)#no logging message <syslog_id>

信息來源：ASA Syslog Configuration Example

更多的關於syslog_id的信息，可以參考如下文檔：

System Log Messages

例如：

111008

Error Message    %PIX|ASA-5-111008: User user
 
 executed the command string

Explanation The user entered any command, with the exception of a show command.

Recommended Action None required.

ASA設置某些log不發送到log server