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

Detect time	2025-05-13 10:30:17
Detect client IP	10.152.1.160 (x-forward-for : 52.15.225.105 )
Detect URL	http://xn--oi3bn8n9wbpwp77c.kr/data/course/20097_main_thumbnail_pc