network ports to access domain shares from computers in workgroups

Hello!

We must open minimum ports to access domain shares (domain controllers and member servers on virtual hosting) from computers in isolated security workgroups. What ports should we open (NTLM, SMB, RPC, DNS)? Client, including Windows XP), will use the SMB URL: \\server\share_folder

Thanks
atom_73Asked:
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QlemoConnect With a Mentor Batchelor, Developer and EE Topic AdvisorCommented:
You'll need DNS (udp/53) for resolving names, and CIFS (445/tcp) for the shares. The old SMB and NetBIOS ports (135, 137-139) can help speed up access if there are issues with DNS or CIFS, but are not essential.
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atom_73Author Commented:
resolved
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atom_73Author Commented:
accepted answer above solve my question
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