<172>Apr 02 2023 14:31:46 10.52.255.1 : %PIX-4-106023: Deny tcp src outside:40.208.242.232/12317 dst signal:113.248.243.72/50995 by access-group "outside"

This is a syslog message from a product called PIX Firewall by Cisco. The following fields were extracted from the message:
priority: 172
senderhost: 10.52.255.1
serverport: 12317
severitylabel: warning
tags: ['cisco_pix_deny', 'deny', 'cisco_pix', 'firewall_action']
productids: [0]
severitycode: 4
sourceinfo: unknown
sensitivity: normal
facilitylabel: local5
messagetype: firewall_action
clientport: 50995
vendorcode: PIX-4-106023
action: block
protocol: 6
facilitycode: 21
streamName: cisco_pix
clientIP: 113.248.243.72
serverIP: 40.208.242.232