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Appendix A – Troubleshooting
D-Link DSL-2750U User Manual
51
DMZ Host
Since some applications are not compatible with NAT, the Router supports
use of a DMZ IP address for a single host on the LAN. This IP address is
not protected by NAT and will therefore be visible to agents on the Internet
with the right type of software. Keep in mind that any client PC in the DMZ
will be exposed to various types of security risks. If you use the DMZ, take
measures (such as client-based virus protection) to protect the remaining
client PCs on your LAN from possible contamination through the DMZ.
To designate a DMZ IP address, type in the IP Address of the server or
device on your LAN, and click the
Save/Apply
button.
Security
To access the
Security
window, click the
Security
button in the
Advanced Setup
directory. The
Security
button appears after configuring WAN
interface in PPPoA, PPPoE, IPoE or IPoA.
IP Filtering
The
IP Filtering
button appears when configuring WAN interface in PPPoA, PPPoE, IPoE or IPoA.
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Appendix A – Troubleshooting
D-Link DSL-2750U User Manual
52
IP Filtering - Outgoing
This window allows you to create a filter rule of
Outgoing
.
Click
change default policy
to change the mode of policy.
Now default policy is BLOCK, it means all outgoing IP traffic from LAN is
blocked, but some IP traffic can be accepted by setting up filters.
If you are setting up the outgoing IP filtering, click the Add button.
Now default policy is ACCEPT, it means all outgoing IP traffic from LAN is
allowed, but some IP traffic can be Blocked by setting up filters.
If you are setting up the outgoing IP filtering, click the Add button.
Enter the information in the section. Explanations of parameters are
described below. Click the
Apply / Save
button to add the entry in the
Active Outbound IP Filtering table.
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Appendix A – Troubleshooting
D-Link DSL-2750U User Manual
53
Filters
Parameter
Description
Filter Name
Enter a name for the new filter.
IP Version
Ipv4/Ipv6
Protocol
Select the transport protocol (Any, TCP/UDP, TCP, UDP or ICMP) that will be used for the filter rule.
Source IP
address[/prefix
length]
Enter the start IP address which you are creating the filter rule.
Source Port
(port or
port:port)
The Source Port is the TCP/UDP port on either the LAN or WAN depending on if you are configuring an Outbound or Inbound
Filter rule.
Destination IP
address[/prefix
length]
Enter the end IP address which you are creating the filter rule.
Destination Port
(port or
port:port)
The Destination Port is the TCP/UDP port on either the LAN or WAN depending on if you are configuring an Outbound or
Inbound Filter rule.
IP Filtering – Incoming
This window allows you to create a filter rule of
Incoming
.
Click
change default policy
to change the mode of policy.
Now default policy is
ACCEPT
, it means all incoming IP traffic from WAN
is accepted, but some IP traffic can be blocked by setting up filters.
If you are setting up the incoming IP filtering, click the
Add
button.
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Appendix A – Troubleshooting
D-Link DSL-2750U User Manual
54
Now default policy is
BLOCK
, it means all incoming IP traffic from WAN is
blocked, but some IP traffic can be accepted by setting up filters.
If you are setting up the incoming IP filtering, click the
Add
button.
Enter the information in the section. Explanations of parameters are
described below. Click the
Apply / Save
button to add the entry in the
Active Inbound IP Filtering table.
Filters Parameter
Description
Filter Name
Enter a name for the new filter.
IP Version
Ipv4/Ipv6
Protocol
Select the transport protocol (Any, TCP/UDP, TCP, UDP or ICMP) that will be used for the filter rule.
Source IP
address[/prefix
length]
Enter the start IP address which you are creating the filter rule.
Source Port (port or
port:port)
The Source Port is the TCP/UDP port on either the LAN or WAN depending on if you are configuring an Outbound or
Inbound Filter rule.
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Appendix A – Troubleshooting
D-Link DSL-2750U User Manual
55
Destination IP
address[/prefix
length]
Enter the end IP address which you are creating the filter rule.
Destination Port
(port or port:port)
The Destination Port is the TCP/UDP port on either the LAN or WAN depending on if you are configuring an Outbound or
Inbound Filter rule.
Parental Control
Use this window to deny access to specified MAC address.
If you are setting up the MAC address blocking, click the
Add
button.
MAC address is a specially formatted text string (xx:xx:xx:xx:xx:xx) that
uniquely identification of a device. This section will allow users to block
devices with certain MAC addresses on the LAN.
To configure for MAC address blocking, enter the username into the
Username
field, click
Browser’s MAC Address
to have MAC address of
the LAN device, or click
Other MAC Address
and enter a MAC address
manually. Tick the checkboxes for the desired individual days of the week
and enter desired
Start Blocking Time
and
End Blocking Time
.
Click the
Save/Apply
button to save the configuration
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