<4>Jul 13 17:35:02 hq-ui002 kernel: [1207473.204430] [UFW BLOCK] IN=ens5 OUT= MAC=02:0a:06:9e:e1:d2:02:4b:94:bf:cd:44:08:00 SRC=130.143.93.172 DST=53.165.37.11 LEN=52 TOS=0x00 PREC=0x00 TTL=255 ID=17788 DF PROTO=TCP SPT=47150 DPT=80 WINDOW=1224 RES=0x00 ACK FIN URGP=0 
This is a syslog message from a product called Uncomplicated Firewall (UFW) by linux. The following fields were extracted from the message:
action: block
clientport: 47150
facilitylabel: kernel
localhostname: hq-ui002
localstarttime: Jul 13 17:35:02
messagetype: firewall_action
priority: 4
program: kernel
protocol: 6
senderhost: 10.1.100.232
sensitivity: normal
serverbytes: 52
serverport: 80
severitycode: 4
severitylabel: warning
sourceinfo: unknown
tags: ['rfc3164', 'ufw', 'firewall_action']
streamName: ufw
clientIP: 130.143.93.172
serverIP: 53.165.37.11