<172>Feb 12 2023 13:16:24 10.52.255.1 : %PIX-4-106023: Deny udp src outside:16.216.35.238/21031 dst sghosts:179.56.65.11/18030 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: 18030
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: 21031
vendorcode: PIX-4-106023
action: block
protocol: 17
facilitycode: 21
streamName: cisco_pix
clientIP: 16.216.35.238
serverIP: 179.56.65.11