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Network services let networked computers send and receive messages, share files, and print. A network service uses one or more protocols or ports to pass through a specific type of traffic.
You can enable the client to either share its files or to browse for shared files and printers on the local network. To prevent network-based attacks, you may not want to enable network file and printer sharing.
You enable network file and print sharing by adding firewall rules. The firewall rules allow access to the ports to browse and share files and printers. You create one firewall rule so that the client can share its files. You create a second firewall rule so that the client can browse for other files and printers.
Refer this article to create firewall rules: Permitting clients to browse for files and printers in the network
http://www.symantec.com/docs/HOWTO80752