The request / response that are contrary to the Web firewall security policies have been blocked.

Detect time	2025-05-13 19:39:00
Detect client IP	10.152.1.160 (x-forward-for : 13.59.252.174 )
Detect URL	http://xn--939au0gv7y.xn--kg-jz1j901a9vcw7s0ie.kr/data/course/20_main_thumbnail_pc