Issue With CSF , UDP Ports not Filtering.

Hello buddies, previously when I was install CSF on my server then in check-host.net my ip's UDP Ports are showing Opened or Filtered. But in my new server I installed CSF but in check-host.net UDP Ports showing connection refused. These UDP_IN and UDP_OUT ports in firewall configuration : UDP_IN = 20,21,53,80,443 UDP_OUT = 20,21,53,113,123,873,6277,24441 Please help me to solve this issue.