User's Manual Part 2

Setting the Firewall Security Level
Chapter 9: Setting Your Security Policy 207
Table 31: Firewall Security Levels
This
level…
Does this… Further Details
Low Enforces basic control on
incoming connections,
while permitting all
outgoing connections.
All inbound traffic is blocked to the external
Safe@Office appliance IP address, except for
ICMP echoes ("pings").
All outbound connections are allowed.
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.
Note: If the security policy is remotely managed, this lever might be disabled.