2N 4G wireless router 2N SpeedRoute - User manual, 1898 v1.02 - Manual (Page 57)

Table of Programmable Parameters 3.2
57
Caution
To make the system work properly, make sure that:
n The WAN port is set and connected properly.
n The UMTS-registered SIM card is inserted.
n The back-up route is set.
n An available ICMP Echo server is set.
Firewall > Basic
Enable Firewall
Here enable/disable the Firewall for communication from an internal network
(LAN, WiFi) to the Internet.
Enable remote administration
Enable/disable remote control of your gateway. This means that the gateway can
be configured not only from an internal network (LAN, WiFi) but also from the
Internet via the UMTS connection or the WAN port.
Check TCP
Enable/disable the check of TCP packets passing through the gateway.
Check SYN-flood
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.
Check Spoofing
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.
Varování
n Be sure to disable this protection when you access 2N ® SpeedRoute
remotely via the WAN port to avoid gateway response failures.
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 (PING
queries/responses, e.g.).