D-Link DIR-651 manual

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Section 6 - Troubleshooting

You should start at 1472 and work your way down by 10 each time. Once you get a reply, go up by 2 until you get a fragmented packet. Take that value and add 28 to the value to account for the various TCP/IP headers. For example, lets say that 1452 was the proper value, the actual MTU size would be 1480, which is the optimum for the network we’re working with (1452+28=1480).

Once you find your MTU, you can now configure your router with the proper MTU size.

To change the MTU rate on your router follow the steps below:

•Open your browser, enter the IP address of your router (192.168.0.1) and click OK.

•Enter your username (admin) and password (blank by default). Click OK to enter the web configuration page for the device.

•Click on Setup and then click Manual Configure.

•To change the MTU enter the number in the MTU field and click Save Settings to save your settings.

•Test your email. If changing the MTU does not resolve the problem, continue changing the MTU in increments of ten.

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Contents Page Manual Revisions PrefaceTrademarks Revision Date DescriptionTable of Contents Connect to a Wireless Network Wireless SecurityWireless Basics Warranty RegistrationProductPackageOverviewContents System Requirements Computer with the followingBrowser Requirements Total Performance IntroductionFeatures Connections Hardware OverviewLEDs Before you Begin InstallationWireless Installation Considerations Getting Started Web-based Configuration Utility ConfigurationClick Launch Internet Connection Setup Wizard to begin Setup WizardConfiguration Configuration Configuration Manual Configuration Primary Host NameServer MAC AddressPPPoE DSL Internet SetupPptp Reconnect Mode Select either Always-on,On-Demand, or ManualMask L2TPStatic assigned by ISP Wireless Settings Wireless Channel Mode Channel WidthSchedule Network Settings NetBIOS Enable DhcpNetBIOS Mode From WANClients Dhcp ReservationVirtual Server Schedules section Port Forwarding Application Rules Speed QoS EnginePage Network Filters Access Control Wizard Access ControlPage Page Website Filter Configure Website Select Allow or Deny Filter BelowAction Select Allow or Deny Inbound FilterFirewall Settings Application Level Gateway Configuration Routing Transmit Power Set the transmit power of the antennas Advanced Wireless SettingsEnable Enable the Wi-Fi Protected Setup feature Wi-Fi Protected Setup WPSAdvanced Network Settings Guest Zone Administrator Settings Time Zone Select the Time Zone from the drop-down menu Time SettingsCheck this box to send the router logs to a SysLog Server SysLogAuthentication authentication Email SettingsSystem Settings Language Pack Update FirmwareDdns System Check Schedules Device Information Wireless LANLog RefreshSave Log Stats Internet Sessions Wireless Support What is WPA? Wireless SecurityWireless Security Setup Wizard Wireless Security Setup WizardPage Configure WPA-Personal PSK Configure WPA-Enterprise Radius Page Windows Connect to a Wireless NetworkPage Page Windows Vista Configure Wireless Security Page Windows XP Configure WPA-PSK Page Why can’t I access the web-based configuration utility? TroubleshootingWhat can I do if I forgot my password? Troubleshooting Page Wireless Basics What is Wireless?Why D-Link Wireless? Wireless Local Area Network Wlan How does wireless work?Wireless Personal Area Network Wpan Who uses wireless?Centralize your router or Access Point Where is wireless used?Tips Eliminate InterferenceWireless Modes Check your IP address Networking BasicsStep Statically Assign an IP addressTechnical Specifications Http//support.dlink.com Http//support.dlink.ca Contacting Technical SupportLimited Warranty WarrantyLimited Software Warranty Non-Applicability of WarrantySubmitting a Claim Disclaimer of Other Warranties What Is Not CoveredGoverning Law Limitation of LiabilityTrademarks Copyright StatementFCC Statement FCC CautionFCC Radiation Exposure Statement Radiation Exposure Statement Industry Canada StatementRegistration

DIR-651 specifications

The D-Link DIR-651 is a versatile wireless router designed to offer a reliable and high-performance networking solution for home and small office environments. With its robust feature set, this device stands out as an excellent option for users seeking a seamless internet experience.

At the core of the DIR-651 is its dual-band capability, which operates on both the 2.4GHz and 5GHz frequency bands. This dual-band functionality allows users to optimize their wireless connections, reducing interference and ensuring smoother performance for bandwidth-intensive applications such as online gaming, HD streaming, and video conferencing. The router supports IEEE 802.11ac standards, delivering data transfer rates of up to 1200 Mbps.

One of the standout features of the DIR-651 is its internal antenna design, which enhances signal strength and coverage throughout your home or office. This enables users to enjoy stable connections even in large spaces, minimizing dead zones and ensuring that all devices connected to the network have reliable access to the internet.

The DIR-651 is equipped with multiple Fast Ethernet ports, allowing for wired connections to desktop computers, gaming consoles, and other devices. This is particularly beneficial for users who prioritize speed and stability over wireless connections for critical applications. Additionally, the router supports advanced Quality of Service (QoS) features, which allow users to prioritize bandwidth for specific applications, ensuring optimal performance for critical tasks.

Security is a top priority for the DIR-651, which comes with advanced security protocols including WPA/WPA2 encryption. This helps protect your network from unauthorized access and ensures that your connection remains secure. The router also features a built-in firewall and supports virtual private network (VPN) functionality, adding another layer of security for users concerned about online privacy.

Setup and management of the DIR-651 is user-friendly, thanks to its intuitive web interface and D-Link's DNS-based dynamic DNS service. The router can be configured easily via a web browser, and users can monitor their network traffic and manage connected devices with a few clicks.

Overall, the D-Link DIR-651 combines advanced technologies and features to provide users with a fast, reliable, and secure networking solution. Whether for streaming, gaming, or general web browsing, this router is designed to meet the demands of today's digital lifestyle, making it a valuable addition to any home or small office network.
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