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

Detect time	2025-05-13 09:22:00
Detect client IP	10.152.1.112 (x-forward-for : 3.135.224.139 )
Detect URL	http://xn--kg-xm7ji6e9xw.kr/data/course/20097_main_thumbnail_pc