Allow all traffic on a LAN

Note: If you use role-based administration:

You must have the Policy setting - firewall right to configure a firewall policy.
You cannot edit a policy if it is applied outside your active sub-estate.

To allow all traffic between computers on a LAN (Local Area Network):

Check which firewall policy is used by the group(s) of computers you want to configure.
See Check which policies a group uses.
In the Policies pane, double-click Firewall, and then double-click the policy you want to change.
On the File and printer sharing page of the Firewall Policy wizard, select Use custom settings, and then click Custom.
In the LAN settings list, select the Trusted check box for a network.

Note: If you allow all traffic between the computers on a LAN, you also allow file and printer sharing on it.