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Changing the MTU Size, Delete, Apply - vpn

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Wireless-N 150 Router WNR1000v3 User Manual 3. Select the radio button next to the QoS policy to be edited or deleted, and do one of the following: • Click Delete to remove the QoS policy. • Click Edit to edit the QoS policy. Follow the instructions in the preceding sections to change the policy settings. 4. Click Apply in the QoS Setup screen to save your changes. Changing 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 any device in the data path has a lower MTU setting than the other devices, the data packets must be split or "fragmented" to accommodate the one with the smallest MTU. The best MTU setting for NETGEAR equipment is often just the default value, and changing the value might fix one problem but cause another. Leave MTU unchanged unless one of these situations occurs: • You have problems connecting to your ISP, or other Internet service, and either the technical support of the ISP or of NETGEAR recommends changing the MTU size. These might require an MTU change: - A secure Web site that will not open, or displays only part of a Web page - Yahoo e-mail - MSN - America Online's DSL service • You use VPN and have severe performance problems. • You used a program to optimize MTU for performance reasons, and now you have connectivity or performance problems. Note: An incorrect MTU setting can cause Internet communication problems such as the inability to access certain Web sites, frames within Web sites, secure login pages, or FTP or POP servers. Fine-Tuning Your Network v1.0, February 2010 5-21

Section	Page
Wireless-N 150 Router WNR1000v3 User Manual	1
Contents	8
About This Manual	12
Chapter 1 Configuring Basic Connectivity	15
Using the Setup Manual	15
Logging In To Your Wireless Router	16
Selecting a Language for Your Screen Display	18
Configuring Your Internet Settings Using the Setup Wizard	20
Viewing and Configuring Basic Internet Settings	20
Your Internet Connection Does Not Require a Login	21
Your Internet Connection Does Require a Login	23
Setting Up and Testing Basic Wireless Connectivity	25
Chapter 2 Safeguarding Your Network	28
Choosing Appropriate Wireless Security	28
Recording Basic Wireless Settings Setup Information	32
Changing Wireless Security Settings	33
Viewing Basic Wireless Settings	33
Configuring WEP Wireless Security	35
Configuring WPA-PSK and WPA2-PSK Wireless Security	37
Viewing Advanced Wireless Settings	38
Using Push 'N' Connect (Wi-Fi Protected Setup)	40
Push Button Configuration	40
Security PIN Entry	42
Configuring the WPS Settings	43
Connecting Additional Wireless Client Devices after WPS Setup	44
Restricting Wireless Access by MAC Address	45
Adding Guest Networks	47
Changing the Administrator Password	49
Backing Up Your Configuration	50
Understanding Your Firewall	50
Chapter 3 Restricting Access From Your Network	52
Content Filtering Overview	52
Blocking Access to Internet Sites	52
Blocking Access to Internet Services	54
Blocking Services by IP Address Range	56
Scheduling Blocking	56
Viewing Logs of Web Access or Attempted Web Access	57
Configuring E-mail Alert and Web Access Log Notifications	58
Setting the Time Zone	59
Chapter 4 Customizing Your Network Settings	60
Using the LAN IP Setup Options	60
Configuring a Device Name	61
Configuring LAN TCP/IP Setup Parameters	61
Using the Router as a DHCP Server	62
Using Address Reservation	63
Using a Dynamic DNS Service	64
Configuring the WAN Setup Options	65
Disabling Port Scan and DoS Protection	65
Setting Up a Default DMZ Server	66
Responding to a Ping on the Internet (WAN) Port	66
Setting the MTU Size	66
Configuring NAT Filtering	67
Configuring Static Routes	67
Chapter 5 Fine-Tuning Your Network	70
Allowing Inbound Connections to Your Network	70
How Your Computer Accesses a Remote Computer through Your Router	71
How Port Triggering Changes the Communication Process	72
How Port Forwarding Changes the Communication Process	74
How Port Forwarding Differs from Port Triggering	75
Configuring Port Forwarding to Local Servers	75
Adding a Custom Service	76
Editing or Deleting a Port Forwarding Entry	77
Configuring Port Triggering	78
Using Universal Plug and Play	81
Optimizing Wireless Performance	83
Using WMM for Wireless Multimedia Applications	84
Quality of Service	84
Using WMM QoS for Wireless Multimedia Applications	85
Configuring QoS for Internet Access	85
Changing the MTU Size	90
Overview of Home and Small Office Networking Technologies	91
Assessing Your Speed Requirements	92
Chapter 6 Using Network Monitoring Tools	94
Viewing Wireless Router Status Information	95
Viewing a List of Attached Devices	100
Managing the Configuration File	100
Backing Up and Restoring the Configuration	101
Erasing the Configuration	101
Updating the Router Firmware	102
Checking for New Firmware in the Router Upgrade Screen	102
Updating Manually to New Router Firmware	103
Enabling Remote Management Access	105
Traffic Meter	107
Chapter 7 Troubleshooting	110
Quick Tips	110
Troubleshooting Basic Functions	111
Login Problems	114
Checking the Internet Service Connection	115
Obtaining an Internet IP Address	115
Troubleshooting PPPoE	116
Troubleshooting Internet Browsing	116
Troubleshooting Your Network Using the Ping Utility	117
Testing the LAN Path to Your Router	117
Testing the Path from Your Computer to a Remote Device	118
Problems with Date and Time	119
Problems with Wireless Adapter Connections	119
Restoring the Default Configuration and Password	121
Appendix A Technical Specifications	122
Default Configuration Settings	122
General Specifications	124
Appendix B Related Documents	125

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Wireless-N 150 Router WNR1000v3 User Manual

Fine-Tuning Your Network

5-21

v1.0, February 2010

Select the radio button next to the QoS policy to be edited or deleted, and do one of the

following:

•

Click

Delete

to remove the QoS policy.

•

Click

Edit

to edit the QoS policy. Follow the instructions in the preceding sections to

change the policy settings.

Click

Apply

in the QoS Setup screen to save your changes.

Changing 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 any device in the data path has a lower MTU setting than

the other devices, the data packets must be split or “fragmented” to accommodate the one with the

smallest MTU.

The best MTU setting for NETGEAR equipment is often just the default value, and changing the

value might fix one problem but cause another. Leave MTU unchanged unless one of these

situations occurs:

•

You have problems connecting to your ISP, or other Internet service, and either the technical

support of the ISP or of NETGEAR recommends changing the MTU size. These might require

an MTU change:

–

A secure Web site that will not open, or displays only part of a Web page

–

Yahoo e-mail

–

MSN

–

America Online’s DSL service

•

You use VPN and have severe performance problems.

•

You used a program to optimize MTU for performance reasons, and now you have

connectivity or performance problems.

Note:

An incorrect MTU setting can cause Internet communication problems such as the

inability to access certain Web sites, frames within Web sites, secure login pages,

or FTP or POP servers.