I have a 4-node home network on a wireless router. Three desktop nodes are wired. The laptop is wireless. Any one of the nodes is able to see the other nodes in the workgroup. Only one of the nodes can be accessed by the others. Neither of the other three nodes can be accessed.
Two of the nodes are running Norton Internet Security (the laptop and the accessible node). The other two nodes are protected only by Windows firewall.
What can I do to configure this network?