Motorola Netopia 2200 Administrator's Handbook page 22

Administrator's Handbook
As a device on the Internet, a Motorola Netopia
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 applica-
tions:
◆
◆
By receiving a response to a scan from a port or series of ports (which is the expected behavior accord-
ing 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, the Motorola Netopia
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.
This table shows how inbound traffic is treated. Inbound means the traffic is coming from the WAN into
the WAN side of the Gateway.
Gateway: WAN Side
Firewall Setting >>
Port Session Type
20 ftp data
21 ftp control
23 telnet external
23 telnet Netopia server
80 http external
80 http Netopia server
67 DHCP client
68 DHCP server
161 snmp
ping (ICMP)
22
◆
ICMP HTTP
◆
SNMP telnet
Off
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Not Applicable
Enabled
Enabled
®
Gateway requires an IP address in order to send or
◆
FTP
◆
DHCP
Low/Medium
--------------Port State-----------------------
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Enabled
Not Applicable
Disabled
Disabled
®
Firewall
*
High
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Disabled
Not Applicable
Disabled
Disabled