<164>Feb 17 2023 18:21:21: %ASA-4-106023: Deny tcp src Inside_Vlan1:156.229.74.26/54128 dst Outside:176.23.164.58/80 by access-group "Inside_Vlan1_access_in" [0x0, 0x0]

This is a syslog message from a product called ASA Firewall by Cisco. The following fields were extracted from the message:
priority: 164
senderhost: 172.16.100.101
serverport: 80
severitylabel: warning
tags: ['cisco_asa_deny', 'deny', 'cisco_asa', 'firewall_action']
productids: [17, 0]
severitycode: 4
sourceinfo: unknown
sensitivity: normal
facilitylabel: local4
messagetype: firewall_action
clientport: 54128
vendorcode: ASA-4-106023
action: block
protocol: 6
facilitycode: 20
streamName: cisco_asa
clientIP: 156.229.74.26
serverIP: 176.23.164.58