And I can add my two cents to all the advice mentioned above:)
Basically, even with the firewall turned off, some filters remain. For example, my Outpost 2.0 saves some filters in the system...
And for Heroes, the critical filters – NetBIOS (which we used to use with Siim) – that are blocked by the firewall by default need to be removed – and then you'll be all set =)
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Best regards =)
P.S. Thanks to Alex for the help!