ZyXEL Communications Vantage CNM 2.3 User Manual page 125

Table 42 Device Operation > Device Configuration > Security > Firewall > Default
Rule (continued)
LABEL
From, To
Log
Vantage CNM User's Guide
DESCRIPTION
Set the firewall's default actions based on the direction of
travel of packets. 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 device or the device itself. The device
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 device 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 device 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 device
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 device. This is the case when the device 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 device. The device applies the
firewall to the traffic after decrypting it.
Note: The VPN connection directions apply to the traffic
going to or from the device's VPN tunnels. They do
not apply to other VPN traffic for which the device 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.
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.
Chapter 6 Device Security Settings
125