Billion Electric Co. Ltd. BIL-9800VNXPD Benutzerhandbuch

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Advanced Step provides some advanced features including Firewall, Routing, NAT, Static DNS, QoS, IPSEC 
Setting

, PPTP Server, PPTP Client, L2TP, Port Isolation and Time Schedule for all advanced users. Please 

move on to have a picture of what the exact feature is about and how to use it.