User Manual

Chapter 14 Firewall
LTE3301 Series User’s Guide
106
Fig ure 71 Security > Firewall > Services l
The following table describes the labels in this screen.
Table 48 Security > Firewall > Services
LABEL DESC RIPTION
ICMP Internet Control Message Protocol is a message control and error-reporting protocol between
a host server and a gateway to the Internet. ICMP uses Internet Protocol (IP) datagrams, but
the messages are processed by the TCP/IP software and directly apparent to the application
user.
Respond to Ping
on
The LTE3301 will not respond to any incoming Ping requests when Disa b le is selected. Select
LAN to reply to incoming LAN Ping requests. Select WAN to reply to incoming WAN Ping
requests. Otherwise select LA N&WAN to reply to all incoming LAN and WAN Ping requests.
Apply Click Ap ply to save the settings.
WAN Stealth Mode
Enable WAN
Stealth Mode
Select this check box to silently discard the matched packets without sending a TCP reset
packet or an ICMP destination-unreachable message to the sender.
Apply Click Ap ply to save the settings.
Enable Firewall Rule
Enable Firewall
Rule
Select this check box to activate the firewall rules that you define (see Add Fire wa ll Rule
below).
Apply Click Ap ply to save the settings.
Add Firewall Rule
Service Name Enter a name that identifies or describes the firewall rule.
MAC Address Enter the MAC address of the computer for which the firewall rule applies.
Dest IP Address Enter the IP address of the computer to which traffic for the application or service is entering.
The LTE3301 applies the firewall rule to traffic initiating from this computer.