Allow VPN
Pass through
The IPSec, PPTP, and L2TP protocols are used to
establish a secure connection, and are widely used
by VPN (Virtual Private Networking) programs.
• If checked, these VPN connections are
allowed.
• If not checked, these VPN connections are
blocked.
Note: IPSec sessions must NOT use AH
(Authentication Header). Packets using AH cannot
be routed correctly.
Drop
fragmented
IP packets
If enabled, fragmented IP packets are discarded,
forcing re-transmission of these packets. In some
situations, this could prevent successful
communication, so this setting is normally disabled.
Block TCP
Flood
A TCP flood is excessively large number of TCP
connection requests. This is usually a DoS (Denial
of Service) attack. This setting should be normally
be enabled.
Block UDP
Flood
A UDP flood is excessively large number of UDP
packets. This is often a DoS (Denial of Service)
attack, but some streaming applications also use
UDP, and blocking UPD packets may prevent them
from working correctly.
Block non-
standard
packets
Abnormal packets are often used by hackers and in
DoS attacks, but may also be generated by other
network devices. (PCs will normally not generate
non-standard packets.) This setting is disabled by
default, but on most networks it can safely be
enabled, and doing so will provide greater
protection.
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