Issue With CSF , UDP Ports not Filtering.

[piyushmaheswari]

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.

 

[cPanelLauren]

Hello,,

Are you saying that the ports you listed here:

UDP_IN = 20,21,53,80,443
UDP_OUT = 20,21,53,113,123,873,6277,24441

Are in CSF as being open for UDP in and out respectively are showing closed when you check them externally? If so then the issue is most likely an external firewall blocking these ports.