Hello, I need to verify the exact ports that need to be open to connect to a windows share, or map a drive. I know TCP 445 definitely is (the SMB port), but which NETBIOS related ports are also required? TCP 135? Yes/no TCP 139? Yes/no UDP 137? Yes/no UDP 138? Yes/no Please let me know, thanks!

Hi c0pe, Thank you for your post. When you share file folder on your network, you need to add below ports to firewall exception: NB-Name 137/UDP NB-Datagram 138/UDP NB-Session 139/TCP SMB 445/TCP For security consideration, you could just use TCP 445 to visit your share folder, please refer to this thread for details. If there are more inquiries on this issue, please feel free to let us know. Regards, Rick Tan

thanks