<4>Jun  5 16:36:03 hq-postgres kernel: [333594.445577] [UFW BLOCK] IN=ens5 OUT= MAC=02:da:4a:4d:f8:d0:02:4b:94:bf:cd:44:08:00 SRC=123.171.194.33 DST=106.90.13.26 LEN=52 TOS=0x08 PREC=0x60 TTL=37 ID=16218 DF PROTO=TCP SPT=56744 DPT=5432 WINDOW=501 RES=0x00 ACK FIN URGP=0 
Product: Uncomplicated Firewall (UFW)
Vendor: linux