TP-Link 16dBi PharOSUN V1 User Guide - Page 52
Security, SPI Firewall
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Chapter 5 Network Tab Security The Security function is available only in AP router mode and AP client router (WISP Client) mode. Stateful Packet Inspection (SPI) is a firewall that keeps track of the state of network connections (such as TCP streams, UDP communication) traveling across it. The firewall is programmed to distinguish legitimate packets for different types of connections. Only packets matching a known active connection will be allowed to pass through by the firewall and others will be rejected. SPI Firewall is enabled by factory default. SPI Firewall Ping VPN Check the Enable box to use the SPI Firewall function. If forwarding rules are enabled at the same time, the device will give priority to meet forwarding rules. WAN Ping Forbidden: The default setting is disabled. If enabled, the device will not reply the ping request originates from Internet. LAN Ping Forbidden: The default setting is disabled. If enabled, the device will not reply the ping request originates from local network. A VPN is created by establishing a virtual point-to-point connection through the use of dedicated connections, virtual tunneling protocols, or traffic encryptions. Through VPN you can access your private network over Internet. A virtual private network connection across the Internet is similar to a wide area network (WAN) link between sites. From a user perspective, the extended network resources are accessed in the same way as resources available within the private network. When hosts in the local area network want to visit the remote virtual private network using virtual tunneling protocols, the corresponding VPN protocol should be enabled. PPTP Passthrough - PPTP (Point-to-Point Tunneling Protocol) allows the Point-to-Point Protocol (PPP) to be tunneled through an IP (Internet Protocol) network. Check the box to allow PPTP tunnels to pass through the Device. L2TP Passthrough - L2TP (Layer Two Tunneling Protocol) is the method used to enable Point-to-Point connections via the Internet on the Layer Two level. Check the box to allow L2TP tunnels to pass through the Device. - 49 -