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Block WAN Ping
When you “Block WAN Ping”, you are causing the public WAN IP address
on the Broadband Router to not respond to ping commands. Pinging
public WAN IP addresses is a common method used by hackers to test
whether your WAN IP address is valid.
Discard PING from WAN side: By enabling this option, the DI-604 will not
reply to ping (ICMP) request packets from the Internet.
VPN Pass-Through
The Broadband Router supports VPN (Virtual Private Network)
pass-through for both PPTP (Point-to-Point Tunneling Protocol) and IPSec
(IP Security). Once VPN pass-through is enabled, there is no need to
open up virtual services. Multiple VPN connections can be made through
the Broadband Router. This is useful when you have many VPN clients on
the LAN network.
SPI Mode
When this feature is enabled, the router will record the packet
information pass through the router like IP address, port address, ACK,
SEQ number and so on. And the router will check every incoming packet
to detect if this packet is valid.
UPnP
UPnP is short for Universal Plug and Play which is a networking
architecture that provides compatibility among networking equipment,
software, and peripherals. The DI-604 is a UPnP enabled router and will
only work with other UPnP devices/softwares. If you do not want to use
the UPnP functionality, it can be disabled by selecting "Disabled".
VPN Pass-Through
The device supports VPN (Virtual Private Network) pass-through for both
PPTP (Point-to-Point Tunneling Protocol) and IPSec (IP Security). Once
VPN pass-through is enabled, there is no need to open up virtual services.
Multiple VPN connections can be made through the device. This is useful
when you have many VPN clients on the local area network.
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