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Block YSN Flood
Enable/ Disable: Prevent the SYN Flood attack. Default is
enabled.
Stateful Packet Inspection
(
SPI
)
Enable/ Disable the process used by a firewall to keep
track of the state of network connections. It’s the highest
level security. Default is enabled.
4.3.3 Open Ports(NAT)
Open Ports is used to map the port range between WAN and LAN terminals of UC510/520.
The access of WAN to the port range will be directed to the specified terminals on the LAN. This
feature is particularly useful for remote working.
Open Ports Settings:
Click
【
Firewall
】
【
Open Ports(NAT)
】
: take the following diagram as example, visit port 2222 from
WAN, the data will be forwarded to the port22 of client 192.168.5.11.
Reference:
Item
Description
Private IP Address
Private destination IP address that packet forwarded to.
E.g.: 192.168.5.11
Public Port
Public port that packet visited
Private Port
Internal port that packet forwarded
Protocol
TCP
Comment
Annotation
Open Ports