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Change the MTU Size, ADVANCED > Setup > WAN Setup

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AC1600 WiFi VDSL/ADSL Modem Router Model D6400 Table 3. Common MTU sizes MTU 1500 1492 1472 1468 1460 1436 1400 Application 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 modem routers, adapters, and switches. Used in PPPoE environments. Maximum size to use for pinging. (Larger packets are fragmented.) Used in some DHCP environments. Usable by AOL if you do not send or receive large email attachments, for example. Used in PPTP environments or with VPN. Maximum size for AOL DSL. Change the MTU Size WARNING: 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. Change the MTU only if you are sure that it is necessary for your ISP connection.  To change the MTU size: 1. Launch an Internet browser from a computer or WiFi device that is connected to the network. 2. Type http://www.routerlogin.net. A login screen displays. 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. 4. Click the OK button. The BASIC Home screen displays. 5. Select ADVANCED > Setup > WAN Setup. The WAN Setup screen displays. 6. In the MTU Size field, enter a value from 616 to 1500. The normal MTU value for most Ethernet networks is 1500 bytes, 1492 bytes for PPPoE connections, or 1436 for PPTP connections. 7. Click the Apply button. Your change is saved. Manage the Internet Settings Manually 89

Section	Page
AC1600 WiFi VDSL/ADSL Modem Router	1
Contents	3
1. Hardware Overview of the Modem Router	9
Unpack Your Modem Router	10
Front Panel with LEDs	11
Back Panel with Ports, Buttons, and Connector	13
Right Side Panel with WPS and WiFi On/Off Buttons and USB Port	14
Bottom Panel Product Label	15
2. Install and Access the Modem Router and Its Network	16
Position Your Modem Router	17
Connect to the Modem Router	18
Connect to the Modem Router Through an Ethernet Cable	18
Join the WiFi Network of the Modem Router	18
Types of Logins	19
NETGEAR genie Automatic Setup Utility	20
Set Up Your Modem Router for DSL Service	21
DSL Service	21
Cable the Modem Router for DSL Service and Access the Modem Router	22
Set Up Your Modem Router for Cable or Fiber Service	29
Log In to the Modem Router After Setup to View or Change Settings	35
Change the Language	37
Change the admin Password and Automatic Login Time-Out Period	37
Set Up Password Recovery	38
Let the Modem Router Automatically Update Its Firmware	39
Access the Modem Router with the NETGEAR genie App	40
3. Manage the Internet Settings Manually	41
Use the Internet Setup Wizard After Initial Setup	42
Manually Set Up an ADSL Internet Connection	47
Specify an ADSL Connection Without a Login Requirement	47
Specify an ADSL Connection with a Login Requirement and PPPoA or PPPoE Service	51
Manually Set Up a VDSL Internet Connection	56
Specify a VDSL Connection Without a Login Requirement	56
Specify a VDSL Connection with a Login Requirement and PPPoE Service	60
Manually Set Up a Cable of Fiber Internet Connection	64
Specify a Cable or Fiber Connection Without a Login Requirement	65
Specify a Cable or Fiber Connection With a Login Requirement and PPPoE Service	69
Specify an IPv6 Internet Connection	73
IPv6 Internet Connections and IPv6 Addresses	73
Set Up an IPv6 Connection Through Auto Detect	74
Set Up an IPv6 6to4 Tunnel Connection	76
Set Up an IPv6 Pass-Through Connection	77
Set Up an IPv6 Fixed Connection	78
Set Up an IPv6 DHCP Connection	80
Set Up an IPv6 PPPoE Connection	82
Set Up an IPv6 Connection Through Auto Config	84
Set Up an IPv6 6rd Tunnel Connection	86
Manage the MTU Size	88
MTU Concepts	88
Change the MTU Size	89
4. Manage the WiFi Network Settings	90
Manage the Basic WiFi Settings and WiFi Security of the Main Network	91
View or Change the Basic WiFi Settings	91
Configure WPA/WPA2 Enterprise WiFi Security	96
Configure WEP Legacy WiFi Security	98
Use WPS to Add a Device to the WiFi Network	100
Use WPS with the Push Button Method	100
Use WPS with the PIN Method	101
Manage the Basic WiFi Settings and WiFi Security of the Guest Network	103
Set Up and Enable a Guest Network	103
Configure WEP Legacy WiFi Security for the Guest WiFi Network	106
Control the WiFi Radios	108
Use the WiFi On/Off Button	108
Enable or Disable the WiFi Radios	109
Set Up a WiFi Schedule	110
Manage the WPS Settings	112
Manage Advanced WiFi Features	114
Use the Modem Router as a WiFi Access Point	115
5. Control Access to the Internet	118
Set Up Parental Controls	119
Allow or Block Access to Your Network	122
Enable and Manage Network Access Control	123
Manage Network Access Control Lists	124
Use Keywords to Block Internet Sites	127
Set Up Blocking	128
Remove a Keyword or Domain from the Blocked List	129
Remove All Keywords and Domains from the Blocked List	130
Specify a Trusted Computer	130
Manage Simple Outbound Firewall Rules for Services and Applications	131
Add an Outbound Firewall Rule	132
Add an Outbound Firewall Rule for a Custom Service or Application	133
Change an Outbound Firewall Rule	136
Remove an Outbound Firewall Rule	137
Set Up a Schedule for Keyword Blocking and Outbound Firewall Rules	138
Set Up Security Event Email Notifications	139
6. Optimize Performance	142
Optimize Traffic with Internet Access QoS	143
Manage Default and Custom QoS Rules	144
View the Default QoS Rules	144
Create a Custom QoS Rule for an Application or Online Game	145
Create a Custom QoS Rule for a Modem Router LAN Port	147
Create a Custom QoS Rule for a MAC Address	148
Change a Default or Custom QoS Rule	151
Remove a QoS Rule	153
Remove All QoS Rules	153
Manage Wi-Fi Multimedia Quality of Service	154
Manage Implicit Beamforming	155
Improve Network Connections with Universal Plug and Play	156
7. Share a Storage Device	158
USB Device Requirements	159
Connect a USB Device to the Modem Router	159
Access a Storage Device Connected to the Modem Router	160
Back Up Windows Computers with ReadySHARE Vault	161
Back Up Mac Computers with Time Machine	161
Set Up a USB Hard Drive on a Mac	161
Prepare to Back Up a Large Amount of Data	162
Use Time Machine to Back Up onto a Storage Device	162
Manage Access to a Storage Device	163
Enable FTP Access Within Your Network	166
View Network Folders on a Device	167
Add a Network Folder on a Storage Device	168
Change a Network Folder, Including Read and Write Access, on a USB Drive	170
Approve USB Devices	172
Safely Remove a USB Device	173
8. Access Storage Devices Through the Internet	175
Set Up and Manage Dynamic DNS	176
Your Personal FTP Server	176
Set Up a New Dynamic DNS Account	177
Specify a DNS Account That You Already Created	178
Access Storage Devices Through the Internet	179
Set Up FTP Access Through the Internet	179
Access Storage Devices Through the Internet with FTP	181
9. Use the Modem Router as a Media Server	183
Specify ReadyDLNA Media Server Settings	184
Play Media from a USB Device on TiVo	185
10. Share a USB Printer	188
Install the Printer Driver and Cable the Printer	189
Download the ReadySHARE Printer Utility	189
Install the ReadySHARE Printer Utility	190
Use the Shared Printer	191
View or Change the Status of a Printer	192
Use the Scan Feature of a Multifunction USB Printer	193
Change NETGEAR USB Control Center Settings	194
Change the NETGEAR USB Control Center Language	195
Specify the Time-out	195
11. Manage the WAN and LAN Network Settings	196
Change the Physical WAN Connection Preference	197
Enable the WAN2 Interface for IPTV	197
Enable and Configure a VLAN	199
Set Up a Bridge for a Port Group or VLAN Tag Group	201
Set Up a Bridge for a Port Group	201
Set Up a Bridge for a VLAN Tag Group	202
Manage the WAN Security Settings	204
Set Up a Default DMZ Server	205
Manage IGMP Proxying	206
Manage NAT Filtering	207
Manage the SIP Application-Level Gateway	207
Manage the Modem Router’s LAN IP Address Settings	208
Manage the Router Information Protocol Settings	209
Manage Reserved LAN IP Addresses	211
Reserve a LAN IP address	211
Change a Reserved IP Address	212
Remove a Reserved IP Address Entry	213
Change the Modem Router’s Device Name	213
Manage the DHCP Server Address Pool	214
Disable the Built-In DHCP Server	215
Set Up and Manage Custom Static Routes	216
Set Up a Static Route	217
Change a Static Route	219
Remove a Static Route	219
12. Manage the Modem Router and Monitor the Traffic	221
Update the Firmware of the Modem Router	222
Check for New Firmware and Update the Modem Router	222
Manually Upload New Firmware and Update the Modem Router	223
Manage the Configuration File of the Modem Router	225
Back Up the Settings	225
Restore the Settings	225
Recover the admin Password	226
Return the Modem Router to Its Factory Default Settings	227
Use the Reset Button	227
Erase the Settings	228
View the Status and Statistics of the Modem Router	229
View Information About the Modem Router and the Internet, Modem, and WiFi Settings	229
View the Traffic Statistics	233
View, Renew, or Release a TCP/IP Internet Connection	235
View, Connect, or Disconnect a PPPoE or PPPoA Internet Connection	237
Manage the Activity Log	238
View and Manage the Log	238
Specify Which Activities Are Logged	240
View Devices Currently on the Network	240
Monitor and Meter Internet Traffic	241
Start the Traffic Meter Without Traffic Volume Restrictions	241
View the Traffic Statistics and Traffic Status	243
Restrict Internet Traffic by Volume	244
Restrict Internet Traffic by Connection Time	245
Unblock the Traffic Meter After the Traffic Limit Is Reached	247
Manage the Modem Router Remotely	247
Configure the Modem Router as a DSL Modem Only	249
13. Use VPN to Access Your Network	251
Set Up a VPN Connection	252
Specify VPN Service in the Modem Router	252
Install OpenVPN Software on Your Computer	253
Use a VPN Tunnel	255
Use VPN to Access the Modem Router’s USB Device and Media	256
Use VPN to Access Your Internet Service at Home	257
Set Up VPN Client Internet Access in the Modem Router	257
Block VPN Client Internet Access in the Modem Router	258
Use a VPN Tunnel to Access Your Internet Service at Home	259
14. Manage Port Forwarding and Port Triggering	260
Manage Port Forwarding to a Local Server for Services and Applications	261
Forward Incoming Traffic for a Default Service or Application	261
Add a Port Forwarding Rule with a Custom Service or Application	262
Change a Port Forwarding Rule	264
Remove a Port Forwarding Rule	265
Application Example: Make a Local Web Server Public	266
How the Modem Router Implements the Port Forwarding Rule	267
Manage Port Triggering for Services and Applications	267
Add a Port Triggering Rule	268
Change a Port Triggering Rule	270
Disable or Remove a Port Triggering Rule	271
Specify the Time-Out Period for Port Triggering	273
Disable Port Triggering	273
Application Example: Port Triggering for Internet Relay Chat	274
15. Troubleshooting	276
Quick Tips for Troubleshooting	277
Troubleshoot with the LEDs	278
Power LED Remains Solid Amber	278
Power LED Is Off	279
WiFi LED Is Off	279
You Cannot Log In to the Modem Router	279
Troubleshoot the Internet Connection	280
Troubleshoot the DSL Link	280
Internet LED Is Off	281
Obtain an Internet IP Address	281
Troubleshoot PPPoE or PPPoA	282
Troubleshoot Internet Browsing	284
Changes Are Not Saved	284
Troubleshoot the WiFi Connectivity	284
Troubleshoot Your Network Using the Ping Utility	285
Test the LAN Path to Your Modem Router	285
Test the Path from Your Computer to a Remote Device	286
A. Supplemental Information	288
Factory Settings	289