Setting the Firewall Security Level
Chapter 12: Setting Your Security Policy 329
This
level…
Does this… Further Details
Medium Enforces strict control on
all incoming connections,
while permitting safe
outgoing connections.
This is the default level
and is recommended for
most cases. Leave it
unchanged unless you
have a specific need for a
higher or lower security
level.
All inbound traffic is blocked.
All outbound traffic is allowed to the Internet
except for Windows file sharing (NBT ports 137,
138, 139 and 445).
High Enforces strict control on all
incoming and outgoing
connections.
All inbound traffic is blocked.
Restricts all outbound traffic except for the
following: Web traffic (HTTP, HTTPS), email (IMAP,
POP3, SMTP), ftp, newsgroups, Telnet, DNS,
IPSEC IKE and VPN traffic.
Block All Blocks all access between
networks.
All inbound and outbound traffic is blocked
between the internal networks.
This does not affect traffic to and from the
gateway itself.
The definitions of firewall security levels provided in this table represent the UTM-1
appliance’s default security policy.
You can easily override the default security policy, by creating user-defined firewall rules.
For further information, see Using Rules on page 334.
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