Table of Programmable Parameters
66
Check TCP
Enable/disable the check of TCP packets passing through the gateway.
Setting options:
ON/OFF
Default setting:
ON
SYN-flood protection
Enable/disable protection against the SYN-flood attack. This type of attack is
based on sending of an excessive quantity of packets with the SYN flag to the
server, which then receives no replies to its confirmation requests. The server,
however, has already allocated the communication-establishing means and
becomes flooded by an excessive count of such requests.
Setting options:
ON/OFF
Default setting:
ON
Spoofing protection
Enable/disable protection against the so-called IP-spoofing attack. A spoof address
is included in the SYN requests and sent to the server. The server then sends its
connection confirmation request to this address, but receives no reply. The server,
however, has already allocated the communication-establishing means and
becomes flooded by an excessive count of such requests.
Setting options:
ON/OFF
Default setting:
ON
Check ICMP
Enable/disable the check of the ICMP packets passing through the gateway. The
ICMP (Internet Control Message Protocol) packets are used by the network
equipment operating systems for sending error messages.
Setting options:
ON/OFF
Default setting:
ON
Save button
Push this button to save the new settings.
Default button
Push this button to restore the default values (factory settings).
Firewall > Port Forwarding
Used for routing packets coming from the Internet to specified ports, routed to
specified internal addresses and ports. The function is often designated as the
static NAT.
Input
Define the port to be forwarded. If a packet routed to this port comes to the
gateway, it is automatically forwarded to the destination specified in the
Target
column.
Setting options:
0-65,535
Default setting:
Empty
