<4>Jun 30 17:46:47 hq-ui001 kernel: [82903.462667] [UFW BLOCK] IN=ens5 OUT= MAC=02:de:5d:9b:04:6e:02:1a:a4:b4:e1:82:08:00 SRC=215.91.125.222 DST=198.87.45.76 LEN=2517 TOS=0x00 PREC=0x00 TTL=64 ID=36460 DF PROTO=TCP SPT=9042 DPT=38022 WINDOW=488 RES=0x00 ACK PSH 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
clientbytes: 2517
clientport: 38022
facilitylabel: kernel
localhostname: hq-ui001
localstarttime: Jun 30 17:46:47
messagetype: firewall_action
priority: 4
program: kernel
protocol: 6
senderhost: 10.1.100.237
sensitivity: normal
serverport: 9042
severitycode: 4
severitylabel: warning
sourceinfo: unknown
tags: ['rfc3164', 'ufw', 'firewall_action']
streamName: ufw
clientIP: 198.87.45.76
serverIP: 215.91.125.222