I am trying to isolate a host on our network to only see the server, and isolate it from everything else on the network.   PCA is 10.10.10.2  Server is 10.10.10.5  I need the server to communicate with PCA and all other devices, but need PCA to only ...

Have been battling a router connection to new ATT t1 connection.  Router was configured and sent from sister company to this new location.  We have had ATT tech test circuit and it tests good, had cat5 cable tested from ATT to router, it tests good. ...