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Chapter 7 Firewall
Basic Home Station VDSL2 P8701T User’s Guide
121
7.3
The Firewall Rules Screen
Note: The ordering of your rules is very important as rules are applied in turn.
Click
Wireless network > Classic configuration > Advanced Setup > Firewall > Rules
to
display the following screen. This screen lists the configured incoming or outgoing firewall rules.
Note the order in which the rules are listed.
Note: The firewall rules that you configure here take priority over the general firewall
action settings in the
General
screen.
Interface
Select
All
to apply the policy to all interfaces on the VDSL Router or select the specific LAN or
WAN interface to which this policy applies.
Direction
Specify the direction of travel of packets (
incoming
or
outgoing
) in this policy.
Default
Action
Specify whether the firewall silently discards packets (
Drop
) or allows the passage of packets
(
Permit
).
Back
Click
Back
to return to the previous screen.
Apply
Click
Apply
to save your customized settings and exit this screen.
Table 36
Firewall General: Add (continued)
LABEL
DESCRIPTION
Page 122 / 240
Chapter 7 Firewall
Basic Home Station VDSL2 P8701T User’s Guide
122
Figure 43
Firewall Rules
The following table describes the labels in this screen.
Table 37
Firewall Rules
LABEL
DESCRIPTION
Incoming/
Outgoing Rules
The following fields summarize the rules you have created that apply to traffic traveling in
the selected packet direction.
No.
This is your firewall rule number. The ordering of your rules is important as rules are applied
in turn.
Page 123 / 240
Chapter 7 Firewall
Basic Home Station VDSL2 P8701T User’s Guide
123
7.3.1
Firewall Rules Configuration
In the
Firewall Rules
screen, click
Add
or click a rule’s
Edit
button to display this screen and refer
to the following table for information on the labels.
Figure 44
Firewall Rules: Add
Active
This field displays whether a firewall rule is turned on or not. Select the check box to enable
the rule. Clear the check box to disable the rule.
Name
This displays the name of the rule.
Interface
This displays the LAN or WAN interface(s) to which this rule is applied.
Filter Criteria
This displays the filtering criteria, such as the source or destination IP addresses and subnet
mask to which this rule applies.
Action
This displays whether the firewall silently discards packets (
Drop
), discards packets and
sends an ICMP message to the sender (
Reject
) or allows the passage of packets (
Permit
).
Remove
Select entries and click the
Remove
button to delete them.
Edit
Click the
Edit
button to go to the screen where you can edit the rule.
Add
Click
Add
to create a new rule.
Apply
Click
Apply
to save your changes back to the VDSL Router.
Table 37
Firewall Rules (continued)
LABEL
DESCRIPTION
Page 124 / 240
Chapter 7 Firewall
Basic Home Station VDSL2 P8701T User’s Guide
124
The following table describes the labels in this screen.
Table 38
Firewall Rules: Add
LABEL
DESCRIPTION
Active
Select this check box to enable the rule.
Rule Name
Enter a descriptive name of up to 16 printable English keyboard characters, including
spaces.
To add a firewall rule, you need to configure at least one of the following fields (except
the
Interface
field).
Interface
Select an interface on the VDSL Router to which this rule applies.
Direction
Select a direction of travel of packets for which you want to configure the firewall rule.
Protocol
Select the IP protocol (
TCP
,
UDP
or
ICMP
) and enter the protocol (service type)
number in the port field.
Source IP Address
Enter the source IP address in dotted decimal notation.
Source Subnet
Mask
Enter the source subnet mask.
Source Port
Enter the single port number or the range of port numbers of the source.
Destination IP
Address
Enter the destination IP address in dotted decimal notation.
Destination Subnet
Mask
Enter the destination subnet mask.
Destination Port
Enter the single port number or the range of port numbers of the destination.
Action
Use the drop-down list box to select whether to discard (
Drop
), deny
and send an ICMP
message to the sender of (
Reject
) or allow the passage of (
Permit
) packets that match
this rule.
Reject Type
If you select
Reject
, specify the type of ICMP message to send to the sender.
Back
Click
Back
to return to the previous screen.
Apply
Click
Apply
to save your customized settings and exit this screen.
Page 125 / 240
Basic Home Station VDSL2 P8701T User’s Guide
125
C
HAPTER
8
Quality of Service (QoS)
8.1
Overview
Quality of Service (QoS) refers to both a network’s ability to deliver data with minimum delay, and
the networking methods used to control the use of bandwidth. Without QoS, all traffic data is
equally likely to be dropped when the network is congested. This can cause a reduction in network
performance and make the network inadequate for time-critical application such as video-on-
demand.
Configure QoS on the VDSL Router to group and prioritize application traffic and fine-tune network
performance. Setting up QoS involves these steps:
1
Configure classifiers to sort traffic into different flows.
2
Assign priority and define actions to be performed for a classified traffic flow.
The VDSL Router assigns each packet a priority and then queues the packet accordingly. Packets
assigned a high priority are processed more quickly than those with low priority if there is
congestion, allowing time-sensitive applications to flow more smoothly. Time-sensitive applications
include both those that require a low level of latency (delay) and a low level of jitter (variations in
delay) such as Voice over IP (VoIP) or Internet gaming, and those for which jitter alone is a problem
such as Internet radio or streaming video.
This chapter contains information about configuring QoS and editing classifiers.
8.1.1
What You Can Do in this Chapter
• The
QoS
screen lets you enable or disable QoS and set the default DSCP mark (
Section 8.3 on
page 127
).
• The
QoS Queue Setup
screen lets you configure QoS queue assignment (
Section 8.4 on page
127
).
• The
QoS Classification Setup
screen lets you add, edit or delete QoS classifiers (
Section 8.5 on
page 130
).
8.2
What You Need to Know
The following terms and concepts may help as you read through this chapter.

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