The Firewall Default Rule (Bridge Mode) Screen - ZyXEL Communications 5 Series User Manual

Chapter 13 Firewall Screens
Table 69 SECURITY > FIREWALL > Default Rule (Router Mode) (continued)
LABEL
From, To
Log
Apply
Reset

13.4 The Firewall Default Rule (Bridge Mode) Screen

Click SECURITY > FIREWALL to open the Default Rule screen.
Use this screen to configure general firewall settings when the ZyWALL is in Bridge mode.
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DESCRIPTION
The firewall rules are grouped by the direction of packet travel. The number of rules
for each packet direction displays. Click Edit 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 ZyWALL or the
ZyWALL itself. The ZyWALL does not apply the firewall to packets traveling from a
LAN computer to another LAN computer on the same subnet.
From VPN means traffic that came into the ZyWALL 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 ZyWALL 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 ZyWALL 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 ZyWALL. This is the case when
the ZyWALL 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 ZyWALL. The ZyWALL applies the firewall to the traffic after decrypting it.
Note: The VPN connection directions apply to the traffic going to or
from the ZyWALL's VPN tunnels. They do not apply to other
VPN traffic for which the ZyWALL is not one of the gateways
(VPN pass-through traffic).
Use the drop-down list box to set the firewall's default actions based on the direction
of travel of packets.
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.
Select the check box next to a direction of packet travel to create a log when the
configured action is taken for packets that are traveling in that direction and do not
match any of your customized rules.
Click Apply to save your changes back to the ZyWALL.
Click Reset to begin configuring this screen afresh.
ZyWALL 5/35/70 Series User's Guide