What firewall ports shall I open for Powershell to perform remote query?

Hi Experts,
I have server that sit behind firewall at DMZ.  What ports shall I open to in order for such cmdlets to make query to DMZ servers remotely.  

I have already opened the following range of ports, but still failed, any idea what ports are still missing?
TCP port: 80,139,443,445,5985,5986
UDP port: 137,138
Ephemeral ports: (TCP 1024-4999,49152-65535)

Some others cmdlets that's failing such as get-WebAppPoolState, Restart-computer etc.
*W3SVC service does exist in target sever, just in case some of you may doubt if service exist.

PS C:\> get-service -name W3SVC -computername DMZServer
get-service : Cannot find any service with service name 'W3SVC'.
At line:1 char:1
+ get-service -name W3SVC -computername DMZServer
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (W3SVC:String) [Get-Service], ServiceCommandException
    + FullyQualifiedErrorId : NoServiceFoundForGivenName,Microsoft.PowerShell.Commands.GetServiceCommand

Thanks.

Regards,
Kung Hui