<4>Jun 30 17:25:17 hq-data005 kernel: [83133.499851] [UFW BLOCK] IN=ens5 OUT= MAC=02:f4:53:22:e1:7f:02:1a:a4:b4:e1:82:08:00 SRC=116.56.190.80 DST=135.19.178.198 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=113 DF PROTO=TCP SPT=7001 DPT=48552 WINDOW=442 RES=0x00 ACK 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: 52
clientport: 48552
facilitylabel: kernel
localhostname: hq-data005
localstarttime: Jun 30 17:25:17
messagetype: firewall_action
priority: 4
program: kernel
protocol: 6
senderhost: 10.1.100.86
sensitivity: normal
serverport: 7001
severitycode: 4
severitylabel: warning
sourceinfo: unknown
tags: ['rfc3164', 'ufw', 'firewall_action']
streamName: ufw
clientIP: 135.19.178.198
serverIP: 116.56.190.80