<172>Mar 22 2023 14:45:02 10.52.255.1 : %PIX-4-106023: Deny udp src inside:42.33.151.47/63721 dst outside:33.40.15.244/54930 by access-group "inside"

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: 54930
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: 63721
vendorcode: PIX-4-106023
action: block
protocol: 17
facilitycode: 21
streamName: cisco_pix
clientIP: 42.33.151.47
serverIP: 33.40.15.244