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4.3.6.2
Outbound IP Filtering
By default, all outgoing IP traffic from the LAN is allowed. The outbound filter allows
you to create a filter rule to block outgoing IP traffic by specifying a filter name and at
least one condition.
In the
Filtering Options
page, click
Outbound IP Filtering
. The page shown in the
following figure appears.
Click
Add
to add an outbound IP filter. The page shown in the following figure
appears.
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Enter the
Filter Name
and specify at least one of the following criteria: protocol,
source/destination IP address, subnet mask, and source/destination port. Click
Apply
to save the settings.
The
ACTIVE OUTGOING IP FILTER
shows detailed information about each
created outbound IP filter.
4.3.6.3
Bridge Filtering
In the
Filtering Options
page, click
Bridge Filtering
. The page shown in the
following figure appears. This page is used to configure bridge parameters. In this
page, you can change the settings or view some information of the bridge and its
attached ports.
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Click
Add
to add a bridge filter. The page shown in the following figure appears.
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Click
Apply
to save the settings.
4.3.7
DNS
Domain Name System (DNS) is an Internet service that translates domain names
into IP addresses. Because domain names are alphabetic, they are easier to
remember. The Internet, however, is actually based on IP addresses. Each time
you use a domain name, a DNS service must translate the name into the
corresponding IP address. For example, the domain name www.example.com
might be translated to 198.105.232.4.
The DNS system is, in fact, its own network. If one DNS server does not know how
to translate a particular domain name, it asks another one, and so on, until the
correct IP address is returned.
Choose
ADVANCED
>
DNS
. The page shown in the following figure appears.
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Figure 8
DNS SERVER CONFIGURATION
If you are using the device for DHCP service on the LAN or if you are using DNS
servers on the ISP network, select
Obtain DNS Info from a WAN interface
.
If you have DNS IP addresses provided by your ISP, enter these IP addresses in
the available entry fields for the preferred DNS server and the alternate DNS
server.
Click
Apply
to save the settings.
4.3.8
Dynamic DNS
The device supports Dynamic Domain Name Service (DDNS). The dynamic DNS
service allows a dynamic public IP address to be associated with a static host
name in any of the many domains, and allows access to a specified host from
various locations on the Internet. Click a hyperlinked URL in the form of
hostname.dyndns.org and allow remote access to a host. Many ISPs assign public
IP addresses using DHCP, so locating a specific host on the LAN using the
standard DNS is difficult. For example, if you are running a public web server or
VPN server on your LAN, DDNS ensures that the host can be located from the
Internet even if the public IP address changes. DDNS requires that an account be
19216811.live