For enabling PowerShell remoting its necessary to use a private network instead of a public network. To enable this this nice powershell script from Microsoft can do the trick.
$NLMType = [Type]::GetTypeFromCLSID('DCB00C01-570F-4A9B-8D69-199FDBA5723B') $INetworkListManager = [Activator]::CreateInstance($NLMType) $NLM_ENUM_NETWORK_CONNECTED = 1 $NLM_NETWORK_CATEGORY_PUBLIC = 0x00 $NLM_NETWORK_CATEGORY_PRIVATE = 0x01 $UNIDENTIFIED = "Unidentified network" $INetworks = $INetworkListManager.GetNetworks($NLM_ENUM_NETWORK_CONNECTED) foreach ($INetwork in $INetworks) { $Name = $INetwork.GetName() $Category = $INetwork.GetCategory() $INetwork.SetCategory($NLM_NETWORK_CATEGORY_PRIVATE) }