User`s guide

Chapter 9 Firewall Screens
LAN-Cell 2 User’s Guide
186
9.4 Firewall Rule Summary Screen
Click SECURITY > FIREWALL > Rule Summary to open the screen. This screen displays
a list of the configured firewall rules.
From, To Set the firewall’s default actions based on the direction of travel of packets. Click the
edit icon to go to a summary screen of the rules for that packet direction.
Here are some example descriptions of the directions of travel.
From LAN To LAN means packets traveling from a computer on one LAN subnet to
a computer on another LAN subnet on the LAN interface of the LAN-Cell or the
LAN-Cell itself. The LAN-Cell does not apply the firewall to packets traveling from a
LAN computer to another LAN computer on the same subnet.
From CELL To LAN means packets that originates from the 3G Cellular connection
and are destined for devices on the private LAN subnet.
From WAN To LAN means packets that originates from the wired Ethernet WAN
port (or serial Dial-Backup port) and are destined for devices on the private LAN
subnet. In fail-over operation, you will typically define the same firewall rules for both
the WAN and CELL packet sources.
From VPN means traffic that came into the LAN-Cell through a VPN tunnel and is
going to the selected “to” interface. For example, From VPN To LAN specifies the
VPN traffic that is going to the LAN. The LAN-Cell applies the firewall to the traffic
after decrypting it.
To VPN is traffic that comes in through the selected “from” interface and goes out
through any VPN tunnel. For example, From LAN To VPN specifies the traffic that
is coming from the LAN and going out through a VPN tunnel. The LAN-Cell applies
the firewall to the traffic before encrypting it.
From VPN To VPN means traffic that comes in through a VPN tunnel and goes out
through (another) VPN tunnel or terminates at the LAN-Cell. This is the case when
the LAN-Cell is the hub in a hub-and-spoke VPN. This is also the case if you allow
someone to use a service (like Telnet or HTTP) through a VPN tunnel to manage
the LAN-Cell. The LAN-Cell applies the firewall to the traffic after decrypting it.
Note: The VPN connection directions apply to the traffic going to or
from the LAN-Cell’s VPN tunnels. They do not apply to other
VPN traffic for which the LAN-Cell is not one of the gateways
(VPN pass-through traffic).
Here are the default actions from which you can select.
Select Drop to silently discard the packets without sending a TCP reset packet or
an ICMP destination-unreachable message to the sender.
Select Reject to deny the packets and send a TCP reset packet (for a TCP packet)
or an ICMP destination-unreachable message (for a UDP packet) to the sender.
Select Permit to allow the passage of the packets.
The firewall rules for the WAN port with a higher route priority also apply to the dial
backup connection.
Log Select the check box next to a direction of packet travel to create a log when the
above action is taken for packets that are traveling in that direction and do not match
any of your customized rules.
Apply Click Apply to save your changes back to the LAN-Cell.
Reset Click Reset to begin configuring this screen afresh.
Table 69 SECURITY > FIREWALL > Default Rule (continued)
LABEL DESCRIPTION