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Page 106 / 178 Scroll up to view Page 101 - 105
Specify Network Settings
108
AC1750
Smart
WiFi
Router
To view the the WAN settings:
1.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
2.
Type
or
.
A login window opens.
3.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home page displays.
4.
Select
ADVANCED > Setup > WAN Setup
.
The following settings display:
•
Disable Port Scan and DoS Protection
. DoS protection protects your LAN against
denial of service attacks such as Syn flood, Smurf Attack, Ping of Death, and many
others. Select this check box only in special circumstances.
•
Default DMZ Server
. This feature is sometimes helpful when you are playing online
games or videoconferencing, but it makes the firewall security less effective. See
Set
Up a Default DMZ Server
on page
109.
•
Respond to Ping on Internet Port
. This feature allows your router to be discovered.
Use this feature only as a diagnostic tool or for a specific reason.
•
Disable IGMP Proxying
. IGMP proxying allows a computer on the local area network
(LAN) to receive the multicast traffic it is interested in from the Internet. If you do not
need this feature, you can select this check box to disable it.
•
MTU Size (in bytes)
. The normal MTU (maximum transmit unit) value for most
Ethernet networks is 1500 bytes, or 1492 bytes for PPPoE connections. Change the
MTU only if you are sure that it is necessary for your ISP connection. See
Change the
MTU Size
on page
40.
•
NAT Filtering
. Network Address Translation (NAT) determines how the router
processes inbound traffic. Secured NAT protects computers on the LAN from attacks
from the Internet, but might prevent some Internet games, point-to-point applications,
Page 107 / 178
Specify Network Settings
109
AC1750
Smart
WiFi
Router
or multimedia applications from working. Open NAT provides a much less secured
firewall, but allows almost all Internet applications to work.
•
Disable SIP ALG
. Some voice or video communication applications do not work well
with SIP ALG. Disabling SIP ALG might help your voice or video applications to create
or accept a call through the router.
5.
Click the
Apply
button.
Your changes are saved.
Set Up a Default DMZ Server
The default DMZ server feature is helpful when you are using some online games and
videoconferencing applications that are incompatible with Network Address Translation
(NAT). The router is programmed to recognize some of these applications and to work
correctly with them, but other applications might not function well. In some cases, one local
computer can run the application correctly if the IP address for that computer is entered as
the default DMZ server.
WARNING:
DMZ servers pose a security risk. A computer designated as the
default DMZ server loses much of the protection of the firewall and
is exposed to exploits from the Internet. If compromised, the DMZ
server computer can be used to attack other computers on your
network.
The router usually detects and discards incoming traffic from the Internet that is not a
response to one of your local computers or a service that you configured in the Port
Forwarding/Port Triggering page. Instead of discarding this traffic, the router can forward the
traffic to one computer on your network. This computer is called the default DMZ server.
To set up a default DMZ server:
1.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
2.
Type
or
.
A login window opens.
3.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home page displays.
4.
Select
ADVANCED > Setup > WAN Setup
.
The WAN Setup page displays.
Page 108 / 178
Specify Network Settings
110
AC1750
Smart
WiFi
Router
5.
Select the
Default DMZ Server
check box.
6.
Type the IP address.
7.
Click the
Apply
button.
Your change takes effect.
Change the Router’s Device Name
The router’s device name is R6400. This device name displays in a file manager when you
browse your network.
To change the router’s device name:
1.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
2.
Type
or
.
A login window opens.
3.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home page displays.
4.
Select
ADVANCED > Setup > LAN Setup
.
The LAN Setup page displays.
5.
In the
Device Name
field, type a new name.
6.
Click the
Apply
button.
Your change is saved.
Change the LAN TCP/IP Settings
The router is preconfigured to use private IP addresses on the LAN side and to act as a
DHCP server. The router’s default LAN IP configuration is as follows:
•
LAN IP address
. 192.168.1.1
•
Subnet mask
. 255.255.255.0
These addresses are part of the designated private address range for use in private networks
and are suitable for most applications. If your network requires a different IP addressing
scheme, you can change these settings.
You might want to change these settings if you need a specific IP subnet that one or more
devices on the network uses, or if competing subnets use the same IP scheme.
Page 109 / 178
Specify Network Settings
111
AC1750
Smart
WiFi
Router
To change the LAN TCP/IP settings:
1.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
2.
Type
or
.
A login window opens.
3.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home page displays.
4.
Select
ADVANCED > Setup > LAN Setup
.
5.
In the
IP Address
field, type the IP address.
6.
In the
IP Subnet Mask
field, type the subnet mask of the router.
The IP address and subnet mask identify which addresses are local to a specific device
and which must be reached through a gateway or router.
7.
Change the RIP settings.
Router Information Protocol (RIP) allows a router to exchange routing information with
other routers.
a.
In the
RIP Direction
menu, select one of the following:
-
Both
. The router broadcasts its routing table periodically and incorporates
information that it receives.
-
Out Only
. The router broadcasts its routing table periodically.
-
In Only
. The router incorporates the RIP information that it receives.
b.
In the
RIP Version
menu, select one of the following:
-
Disabled
. This is the default setting.
Page 110 / 178
Specify Network Settings
112
AC1750
Smart
WiFi
Router
-
RIP-1
. This format is universally supported. It is adequate for most networks,
unless your network setup is unusual.
-
RIP-2
. This format carries more information. Both RIP-2B and RIP-2M send the
routing data in RIP-2 format. RIP-2B uses subnet broadcasting. RIP-2M uses
multicasting.
8.
Click the
Apply
button.
Your changes are saved.
If you changed the LAN IP address of the router, you are disconnected when this change
takes effect.
9.
To reconnect, close your browser, relaunch it, and log in to the router
Specify the IP Addresses That the Router Assigns
By default, the router acts as a Dynamic Host Configuration Protocol (DHCP) server. The
router assigns IP, DNS server, and default gateway addresses to all computers connected to
the LAN. The assigned default gateway address is the LAN address of the router.
These addresses must be part of the same IP address subnet as the router’s LAN IP
address. Using the default addressing scheme, define a range between 192.168.1.2 and
192.168.1.254, although you can save part of the range for devices with fixed addresses.
To specify the pool of IP addresses that the router assigns:
1.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
2.
Type
or
.
A login window opens.
3.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home page displays.

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