<172>Feb 01 2023 17:39:33 10.52.255.1 : %PIX-4-106023: Deny tcp src inside:18.5.57.60/55326 dst outside:75.17.117.65/54443 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: 54443
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: 55326
vendorcode: PIX-4-106023
action: block
protocol: 6
facilitycode: 21
streamName: cisco_pix
clientIP: 18.5.57.60
serverIP: 75.17.117.65