Netgear C6220 Docsis 3 0 High Speed Wifi Cable Modem Router User Manual

							Share a USB Storage Device Attached to the Modem Router 41
 AC1200 WiFi Cable Modem Router Model C6220
Add a Network Folder on a USB Storage Device
You can add network folders on a USB storage device connected to the mode\
m router USB 
port.
To add a network folder:
1.  Launch a web browser from a WiFi-enabled computer or mobile device that \
is 
connected to the network.
2.  T
ype  http://routerlogin.net  or http://192.168.0.1.
A login window opens.
3.  Enter the modem 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  ADV
 ANCED > ReadySHARE .
The USB Storage (Advanced Settings) page displays.
5.  Click the  Edit button.
6.  Click the  Create Network Folder  button.
If this window does not open, your web browser might be blocking pop-ups\
. If it is, 
change the browser settings to allow pop-ups. 
7.  Complete the fields.
The user name (account name) for All – no password is guest. The password for admin is  the same one that is used to log in to the modem router. By default, it \
is password.
8.  Click the  Apply button.
The folder is added on the USB device. 
						

							Share a USB Storage Device Attached to the Modem Router 
42 AC1200 WiFi Cable Modem Router Model C6220 
Edit a Network Folder on a USB Storage Device
You can edit network folders on a USB storage device connected to the modem router USB 
port.
To edit a network folder:
1. Launch a web browser from a WiFi-enabled computer or mobile device that is 
connected to the network.
2. Type http://routerlogin.net or http://192.168.0.1.
A login window opens.
3. Enter the modem 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 > ReadySHARE.
The USB Storage (Advanced Settings) page displays.
5. Click the Edit button.
The Edit Network Folder window opens.
6. Change the settings in the fields as needed.
7. Click the Apply button.
Your settings are saved.
Approve USB Storage Devices
For more security, you can set up the modem router to share only USB storage devices that 
you approve. 
To approve USB devices:
1. Launch a web browser from a WiFi-enabled computer or mobile device that is 
connected to the network.
2. Type http://routerlogin.net or http://192.168.0.1.
A login window opens.
3. Enter the modem 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. 
						

							Share a USB Storage Device Attached to the Modem Router 43
 AC1200 WiFi Cable Modem Router Model C6220
4. 
Select  ADVANCED > Advanced Setup > USB Settings.
By default Enable any USB Device connection to the USB port radio is sel\
ected. This 
setting lets you connect and access all your USB drives.
5.  Select the No radio button.
6.  Click the  Approved Devices button. 
The approved and available USB devices display. 
7.  In the Available USB Devices list, select the drive that you want to approve.
8.  Click the  Add button.
9.  Select the  Allow only approved devices  check box.
10.  Click the  Apply button.
Your settings are saved.
11.  T
o work with another USB device, first click the  Safely Remove USB Device button for the 
currently connected USB device. 
12.  Connect the other USB device, and repeat this process. 
						

							Share a USB Storage Device Attached to the Modem Router 
44 AC1200 WiFi Cable Modem Router Model C6220 
Safely Remove a USB Storage Device
Before you physically disconnect a USB storage device from the modem router USB port, log 
in to the modem router and take the USB storage device offline.
To remove a USB storage device safely: 
1. Launch a web browser from a WiFi-enabled computer or mobile device that is 
connected to the network.
2. Type http://routerlogin.net or http://192.168.0.1.
A login window opens.
3. Enter the modem 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 USB Storage > Basic Settings.
The USB Storage page displays.
5. Click the Safely Remove USB Device button. 
This takes the drive offline.
6. Physically disconnect the USB drive. 
						

							45
6
6.   Specify Network Settings
This chapter includes the following sections:
•View or Change the WAN Settings 
•Change the MTU Size 
•Set Up a Default DMZ Server 
•Change the Modem Router’s Device Name 
•Change the LAN TCP/IP Settings 
•Specify the IP Addresses That the Modem Router Assigns 
•Manage LAN IP Addresses 
•Use the WPS Wizard for WiFi Connections 
•Specify Basic WiFi Settings 
•Change the WiFi Security Option 
•Set Up a WiFi Guest Network 
•Control the WiFi Radios 
•Specify WPS Settings 
•Set Up a WiFi Access List 
•Dynamic DNS 
•Improve Network Connections With Universal Plug-N-Play  
						

							Specify Network Settings 46
AC1200 WiFi Cable Modem Router Model C6220 
View or Change the WAN Settings
You can view the wide area network (WAN) settings for the Internet port. You can set up a 
DMZ (demilitarized zone) server, change the maximum transmit unit (MTU) size, and enable 
the modem router to respond to a ping to its WAN (Internet) port. 
To view or change the WAN settings:
1.  Launch a web browser from a WiFi-enabled computer or mobile device that \
is 
connected to the network.
2.  T
ype  http://routerlogin.net  or http://192.168.0.1.
A login window opens.
3.  Enter the modem 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  ADV
 ANCED > Setup > WAN Setup.
5.  V
iew or change the following settings:
•Disable IPv4 Firewall Protection. 
• 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  49.
• Respond to Ping on Internet Port. 
 This feature allows your modem router to be 
discovered. Use this feature only as a diagnostic tool or if there is a \
specific reason. 
• Disable IGMP Proxying . IGMP proxying allows a computer on the local area network 
(LAN) to receive the multicast traf
 fic it is interested in from the Internet. If you do not 
need this feature, you can select this check box to disable it. 
						

							Specify Network Settings 
47  AC1200 WiFi Cable Modem Router Model C6220
•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 47.
•Disable SIP ALG. Some VoIP applications do not work well with the SIP ALG. 
Selecting this check box to turn off the SIP ALG might help your VoIP devices to 
create or accept a call through the modem router.
6. Click the Apply button.
Your settings are saved.
Change the MTU Size
The maximum transmission unit (MTU) is the largest data packet a network device transmits. 
When one network device communicates across the Internet with another, the data packets 
travel through many devices along the way. If a device in the data path uses a lower MTU 
setting than the other devices, the data packets must be split or “fragmented” to 
accommodate the device with the smallest MTU. 
The best MTU setting for NETGEAR equipment is often the default value. In some situations, 
changing the value fixes one problem but causes another. Leave the MTU unchanged unless 
one of these situations occurs:
•You experience problems connecting to your ISP or other Internet service, and the 
technical support of either the ISP or NETGEAR recommends changing the MTU setting. 
These web-based applications might require an MTU change:
-A secure website that does not open, or displays only part of a web page
-Yahoo email
-MSN portal
-America Online’s DSL service
•You use VPN and are experiencing severe performance problems.
•You used a program to optimize MTU for performance reasons, and now you are 
experiencing connectivity or performance problems.
Note:An incorrect MTU setting can cause Internet communication 
problems. For example, you might not be able to access certain 
websites, frames within websites, secure login pages, or FTP or 
POP servers.
To change the MTU size:
1.Launch a web browser from a WiFi-enabled computer or mobile device that is 
connected to the network.
2.Type http://routerlogin.net or http://192.168.0.1. 
						

							Specify Network Settings 48
AC1200 WiFi Cable Modem Router Model C6220 
A login window opens.
3. Enter the modem 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  ADV
 ANCED > Setup > WAN Setup . 
5.In the MTU Size field, enter a value from 64 to 1500.
6. Click the  Apply button.
Your settings are saved.
If you suspect an MTU problem, a common solution is to change the MTU to\
 1400. If you are 
willing to experiment, you can gradually reduce the MTU from the maximum\
 value of 1500 
until the problem goes away

. The following table describes common MTU sizes and 
applications. 
Table 2.  Common MTU sizes   
MTUApplication
1500 The largest Ethernet packet size. This setting is typical for connections that do not use 
PPPoE or VPN, and is the default value for NETGEAR routers, adapters, an\
d switches.
1492 Used in PPPoE environments.
1472 Maximum size to use for pinging. (Larger packets are fragmented.)
1468 Used in some DHCP environments.
1460 Usable by AOL if you do not use large email attachments, for example.
1436 Used in PPTP environments or with VPN.
1400 Maximum size for AOL DSL.
576 Typical value to connect to dial-up ISPs.
  
						

							Specify Network Settings 
49  AC1200 WiFi Cable Modem Router Model C6220
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 modem 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 modem 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 on the Port 
Forwarding/Port Triggering page. Instead of discarding this traffic, the modem 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 a web browser from a WiFi-enabled computer or mobile device that is 
connected to the network.
2. Type http://routerlogin.net or http://192.168.0.1.
A login window opens.
3. Enter the modem 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.
5. Select the Default DMZ Server check box.
6. Type the IP address.
7. Click the Apply button.
Your settings are saved. 
						

							Specify Network Settings 50
AC1200 WiFi Cable Modem Router Model C6220 
Change the Modem Router’s Device Name
The modem router’s 
device name is C6220. This device name displays in a file manager 
when you browse your network.
To change the modem router’s device name:
1.  Launch a web browser from a WiFi-enabled computer or mobile device that \
is 
connected to the network.
2.  T
ype  http://routerlogin.net  or http://192.168.0.1.
A login window opens.
3.  Enter the modem 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  ADV
 ANCED > Setup > LAN Setup .
5. In the Device Name field, type a new name.
6.  Click the  Apply button.
Your settings are saved.
Change the LAN TCP/IP Settings
The modem router is preconfigured to use private IP addresses on the LAN\
 side and to act as  a DHCP server. The modem router’s default LAN IP configuration is as follows:
• LAN IP address. 192.168.0.1
• Subnet mask. 255.255.255.0