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

Detect time	2025-05-13 10:33:23
Detect client IP	10.152.1.112 (x-forward-for : 3.16.125.156 )
Detect URL	http://xn--939au0g.xn--kg-jz1j901a9vcw7s0ie.kr/data/course/20_main_thumbnail_pc