TCP SYN to CloudFlare servers from WordPress

My provider registered TCP SYN from Wordpress on Webhosting. This is log:

Nov 6 15:01:00 wl44-f99 kernel: UDPLIMITOVERIN= OUT=eth0 SRC=2a02:2b88:0001:0004:000a:0000:0002:16df DST=2606:4700:0030:0000:0000:0000:681c:1f72 LEN=80 TC=0 HOPLIMIT=64 FLOWLBL=0 PROTO=TCP SPT=35562 DPT=80 WINDOW=14400 RES=0x00 SYN URGP=0 UID=119058 GID=501

Do you know, what is it?