Please clarify...
You would never be able to access e-smith web based manager from outside the network.... as it is not allowed unless you use any of the external access methods... (ej. ssh)
If you mean you are not able to access your server from your local network, and you were not able before , try to double check all your net related stuff... wiring connection (hardware) and ip configuration of each of your client pcs,if all is all right. maybe proxy settings could be wrong in your browser (it sould be pointed to your server's ip address and port sould be 3128
your server url shoud be "http://www.yourdomain.ext/e-smith-manager" or 192.168.1.1/e-smith-manager
But it only works within your local network.
Alejandro