UDP port block Message In NetFlow Analyzer
In NetFlow Analyzer we do two types of check in windows firewall, while flows are being received in server
if there is any allow rules created to allow UDP port say "9996" -Once
our product find out this rule then flows collection will get started
if there is block rules with "ANY UDP port" or "ANY port" criteria- if
any block rules are there with any criteria or UDP ANY criteria then
this message will be displayed in GUI.
1)Login to NetFlow Analyzer installed server->Go to Windows defender firewall->Inbound rules.
2)Now sort on Action tab to find out blocked rules->There should be blocked rules with criteria as "ANY" or "UDP" under protocol tab
and under Local Port and remote port there will be "ANY" criteria which is the reason why you are getting this message
on the rule name->Protocols and ports->configure the port range
as below if your UDP listener port is 9996 by excluding UDP port alone.
the rule and repeat this for all blocked rules and then restart NetFlow
Analyzer service and check the issue and let us know.