Page 31 / 61
Scroll up to view Page 26 - 30
Please check
www.sitecom.com
for up to date drivers & utilities, manuals and support
31
7 Firewall Settings
Firewall contains several features that are used to deny or allow traffic from passing through
the device.
7.1 Port Forwarding
Firewall keeps unwanted traffic from the Internet away from your LAN computers. Add a Port
Forwarding entry will create a tunnel through your firewall so that the computers on the
Internet can communicate to one of the computers on your LAN on a single port.
Field
Description
Enable Port
Forwarding
Check this item to enable the port-forwarding feature.
Protocol
There are 3 options available: TCP, UDP and Both.
Enable
Check this item to enable this entry.
Local IP Address
IP address of your local server that will be accessed by Internet.
Port
The destination port number that is made open for this application on
the LAN-side.
Page 32 / 61
Sitecom ADSL2+ Modem DC-227
32
Remote IP Address
The source IP address from which the incoming traffic is allowed. Leave
blank for all.
External Port
The destination port number that is made open for this application on
the WAN-side
Interface
Select the WAN interface on which the port-forwarding rule is to be
applied.
Apply Changes
Click to save the rule entry to the configuration.
Delete Selected
Delete the selected port forwarding rules from the forwarding table. You can click the
checkbox at the
Select
column to select the forwarding rule.
Delete All
Delete all forwarding rules from the forwarding table.
Page 33 / 61
Please check
www.sitecom.com
for up to date drivers & utilities, manuals and support
33
7.2 URL Blocking
The URL Blocking is the web filtering solution. The firewall includes the ability to block access
to specific web URLs based on string matches. This can allow large numbers of URLs to be
blocked by specifying only a FQDN (such as tw.yahoo.com). The URL Blocking enforce a Web
usage policy to control content downloaded from, and uploaded to, the Web.
Field
Description
URL Blocking
capability
Check this item to enable the URL Blocking feature.
FQDN
A
fully qualified domain name
(or
FQDN
) is an unambiguous
domain
name
that specifies the node's position in the
DNS
tree hierarchy
absolutely, such as tw.yahoo.com. The FQDN will be blocked to access.
Keyword
The filtered keyword such as yahoo. If the URL includes this keyword,
the URL will be blocked to access.
Apply Changes:
Click to disable/enable the URL Blocking capability
Add FQDN:
Add FQDN into URL Blocking table.
Delete Selected FQDN:
Delete the selected FQDN from the URL Blocking table. You can
click the checkbox at the
Select
column to select the Blocked
FQDN.
Page 34 / 61
Sitecom ADSL2+ Modem DC-227
34
7.3 DMZ
A DMZ (Demilitarized Zone) allows a single computer on your LAN to expose ALL of its ports
to the Internet. Enter the IP address of that computer as a DMZ (Demilitarized Zone) host
with unrestricted Internet access. When doing this, the DMZ host is no longer behind the
firewall.
Field
Description
Enable DMZ
Check this item to enable the DMZ feature.
DMZ Host IP
Address
IP address of the local host. This feature sets a local host to be exposed
to the Internet.
Apply Changes
Click to save the setting to the configuration.
Page 35 / 61
Please check
www.sitecom.com
for up to date drivers & utilities, manuals and support
35
7.4 IP Filtering
The IP/Port filtering feature allows you to deny/allow specific services or applications in the
forwarding path.
Field
Description
Outgoing Default
Action
Specify the default action on the LAN to WAN forwarding path.
Incoming Default
Action
Specify the default action on the WAN to LAN forwarding path.
Apply Changes
Click to save the setting of default actions to the configuration.
19216811.live