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

Detect time	2025-05-14 02:19:09
Detect client IP	10.152.1.199 (x-forward-for : 3.138.189.0 )
Detect URL	http://xn--939au0gv7y.xn--kg-jz1j901a9vcw7s0ie.kr/data/course/20139_main_thumbnail_pc