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Aolynk DR814Q ADSL2+ Broadband Router
low: Indicates that the external and internal users have more access rights than
"medium".
default: Indicates that the internal users can access all the Internet services, while
the external users are prevented to access the internal network.
III. Configure port filtering policies
You can configure port filtering policies manually to meet the actual demands.
Table 5-3 Description of port filtering policy setting items
Description
Source
Destination
IP Protocol
Destination Port
Range
Inbound
Outbound
Click <Add> after the configuration. This policy will be added to the list of port filtering
policies. You can click <Delete> to delete the corresponding policy.
Example: External hosts are not allowed to ping the WAN port of the DR814Q when the
security level is set to "low". To allow the internal hosts and external hosts to ping each
other, you can perform the configuration as shown in Figure 5-8 and Figure 5-9.
Item
Type in a description of the port filtering policy to identify
it.
Type in the source IP address. The default address
Address
0.0.0.0 indicates any node on the network.
Type in the subnet mask of the source. The default mask
Mask
0.0.0.0 indicates any node on the network.
Type in the destination IP address. The default address
Address
0.0.0.0 indicates any node on the network and is usually
adopted.
Type in the subnet mask of the destination. The default
Mask
mask 0.0.0.0 indicates any node on the network and is
usually adopted.
Select a protocol type (TCP, UDP or ICMP) from the
drop-down list and apply the filtering policy to the packets
of this type.
Type in the port range of the destination. Generally, this
parameter needs to be set. For example, to control Web
services, type in the corresponding port number 80. To
control FTP services, type in the port number 21.
The direction of inbound data. Select the Allow option to
permit external hosts to access internal hosts. Select the
Block option to forbid external hosts to access internal
hosts.
The direction of outbound data. Select the Allow option to
permit internal hosts to access external hosts. Select the
Block option to forbid internal hosts to access external
hosts.
Description
45
5 Advanced Configuration
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