Tips For Making Your Breakwater Basic Firewall Selection; Basic Firewall Background - Netopia 2200 series Software User's Manual

Security

TIPS for making your BreakWater Basic Firewall Selection

Application
Typical Internet usage
(browsing, e-mail)
Multi-player online
gaming
Going on vacation
Finished online use for
the day
Chatting online or using
instant messaging

Basic Firewall Background

As a device on the Internet, a Netopia Gateway requires an IP address in order to send or
receive traffic.
The IP traffic sent or received have an associated application port which is dependent on
the nature of the connection request. In the IP protocol standard the following session
types are common applications:
• ICMP
• SNMP
By receiving a response to a scan from a port or series of ports (which is the expected
behavior according to the IP standard), hackers can identify an existing device and gain a
potential opening for access to an internet-connected device.
To protect LAN users and their network from these types of attacks, BreakWater offers
three levels of increasing protection.
The following tables indicate the state of ports associated with session types, both on
the WAN side and the LAN side of the Gateway.
Select this Level
SilentRunning
ClearSailing Set Pinholes; once defined, pinholes will be
active whenever ClearSailing is set.
Restore SilentRunning when finished.
LANdLocked Protects your connection while your away.
LANdLocked This protects you instead of disconnecting your
Gateway connection.
ClearSailing Set Pinholes; once defined, pinholes will be
active whenever ClearSailing is set.
Restore SilentRunning when finished.
• HTTP
• telnet
Other Considerations
• FTP
• DHCP
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