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User
’
s Guide
141
C
H A P T E R
1 3
Firewall
13.1 Overview
Use these screens to enable and configure the firewall that protects your NBG4115
and your LAN from unwanted or malicious traffic.
Enable the firewall to protect your LAN computers from attacks by hackers on the
Internet and control access between the LAN and WAN. By default the firewall:
•
allows traffic that originates from your LAN computers to go to all of the
networks.
•
blocks traffic that originates on the other networks from going to the LAN.
The following figure illustrates the default firewall action. User
A
can initiate an IM
(Instant Messaging) session from the LAN to the WAN (1). Return traffic for this
session is also allowed (2). However other traffic initiated from the WAN is blocked
(3 and 4).
Figure 73
Default Firewall Action
13.1.1 What You Can Do in this Chapter
•
Use the
General
screen (
Section 13.2 on page 144
) to enable or disable the
NBG4115
’
s firewall.
•
Use the
Services
screen (
Section 13.3 on page 144
) screen enable service
blocking, enter/delete/modify the services you want to block and the date/time
you want to block them.
WAN
LAN
3
4
1
2
A
C
om
pan
y
C
on
fiden
tial
Содержание NBG-417N
Страница 9: ...Contents Overview User s Guide 10 C o m p a n y C o n f i d e n t i a l...
Страница 17: ...Table of Contents User s Guide 18 C o m p a n y C o n f i d e n t i a l...
Страница 19: ...20 C o m p a n y C o n f i d e n t i a l...
Страница 23: ...Chapter 1 Introduction User s Guide 24 C o m p a n y C o n f i d e n t i a l...
Страница 25: ...Chapter 2 The WPS Button User s Guide 26 C o m p a n y C o n f i d e n t i a l...
Страница 37: ...Chapter 3 The Web Configurator User s Guide 38 C o m p a n y C o n f i d e n t i a l...
Страница 53: ...Chapter 4 Connection Wizard User s Guide 54 C o m p a n y C o n f i d e n t i a l...
Страница 61: ...Chapter 5 AP Mode User s Guide 62 C o m p a n y C o n f i d e n t i a l...
Страница 77: ...Chapter 6 Tutorials User s Guide 78 C o m p a n y C o n f i d e n t i a l...
Страница 79: ...80 C o m p a n y C o n f i d e n t i a l...
Страница 117: ...Chapter 9 LAN User s Guide 118 C o m p a n y C o n f i d e n t i a l...
Страница 123: ...Chapter 10 DHCP Server User s Guide 124 C o m p a n y C o n f i d e n t i a l...
Страница 137: ...Chapter 12 DDNS User s Guide 138 C o m p a n y C o n f i d e n t i a l...
Страница 138: ...139 PART III Security Firewall 141 Content Filtering 147 C o m p a n y C o n f i d e n t i a l...
Страница 139: ...140 C o m p a n y C o n f i d e n t i a l...
Страница 145: ...Chapter 13 Firewall User s Guide 146 C o m p a n y C o n f i d e n t i a l...
Страница 151: ...152 C o m p a n y C o n f i d e n t i a l...
Страница 155: ...Chapter 15 Static Route User s Guide 156 C o m p a n y C o n f i d e n t i a l...
Страница 167: ...Chapter 17 Remote Management User s Guide 168 C o m p a n y C o n f i d e n t i a l...
Страница 177: ...Chapter 18 UPnP User s Guide 178 C o m p a n y C o n f i d e n t i a l...
Страница 179: ...180 C o m p a n y C o n f i d e n t i a l...
Страница 185: ...Chapter 19 System User s Guide 186 C o m p a n y C o n f i d e n t i a l...
Страница 197: ...Chapter 22 Sys OP Mode User s Guide 198 C o m p a n y C o n f i d e n t i a l...
Страница 199: ...Chapter 23 Language User s Guide 200 C o m p a n y C o n f i d e n t i a l...
Страница 207: ...Chapter 24 Troubleshooting User s Guide 208 C o m p a n y C o n f i d e n t i a l...
Страница 209: ...210 C o m p a n y C o n f i d e n t i a l...
Страница 213: ...Appendix A Product Specifications User s Guide 214 C o m p a n y C o n f i d e n t i a l...
Страница 279: ...Index User s Guide 280 C o m p a n y C o n f i d e n t i a l...