<180>Jul 23 2023 19:40:19: %ASA-4-106023: Deny tcp src outside:166.115.179.151/35012 dst DMZ:98.35.209.143/49163 by access-group "outside_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:
action: block
clientport: 49163
facilitycode: 22
facilitylabel: local6
messagetype: firewall_action
priority: 180
protocol: 6
senderhost: 172.20.1.1
sensitivity: normal
serverport: 35012
severitycode: 4
severitylabel: warning
sourceinfo: unknown
tags: ['cisco_asa_deny', 'deny', 'cisco_asa', 'firewall_action']
vendorcode: ASA-4-106023
streamName: cisco_asa
clientIP: 98.35.209.143
serverIP: 166.115.179.151