Configure Cisco ASA using ASDM

• Load the ASDM.
• Select Configuration > Device Management > Logging > Logging Setup.

• Select Enable Logging.
• Select Logging > Logging Filters.
• Choose the syslog-servers as Informational.
• Select Logging > Syslog servers.
• Click Add.

• Enter the IP address and choose the appropriate interface. Also, ensure that you choose UDP and enter the port number 514 or 1514.
• Select Logging > Syslog Setup.
• Select Include time stamp in syslogs option and scroll down to ensure the syslog IDs 302013, 302014, 302015 & 302016 are in enabled state and the logging level is set to Informational.

Refer the links for Security event syslog IDs and VPN event syslog IDs to be enabled.