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

Detect time	2025-12-03 04:04:29
Detect client IP	216.73.216.123 (x-forward-for : 10.2.86.247 )
Detect URL	http://www.cheongdo.go.kr/open.content/cs/reserve/youth.hall/past.lecture/