ping xxx.xxx.xxx.xxx

Test-NetConnection -ComputerName xxx.xxx.xxx.xxx -Port 445

O Windows 11 exige SMB2 no mínimo

Get-SmbServerConfiguration | Select EnableSMB1Protocol, EnableSMB2Protocol

Get-SmbClientConfiguration | Select EnableBandwidthThrottling, RequireSecuritySignature

Se RequireSecuritySignature estiver True, pode bloquear conexões com FreeNAS mais antigo. Para desabilitar temporariamente (como teste):

Set-SmbClientConfiguration -RequireSecuritySignature $false