[정보] 아파치 CloudFlare IP Whitelist 설정 $CATALINA_BASE/conf/web.xml 또는 WEB-INF/web.xml 파일 수정 Remote CIDR Filter org.apache.catalina.filters.RemoteCIDRFilter allow 127.0.0.1, 2400:cb00::/32, 2606:4700::/32, 2803:f800::/32, 2405:b500::/32, 2405:8100::/32, 2a06:98c0::/29, 2c0f:f248::/32, 173.245.48.0/20, 103.21.244.0/22, 103.22.200.0/22, 103.31.4.0/22, 141.101.64.0/18, 108.162.192.0/18, 190.93.240.0/20..