Modem Error 721
Protocol (PPTP) client. You may even get an error 721 after making an unsuccessful attempt to establish a dial-up connection after upgrading your computer to error 721 vpn Microsoft Windows XP from earlier versions. The exact error 721 description may vary error 721 vpn windows xp from 'Remote PPP peer is not responding' to 'the remote computer is not responding'. Cause of Error 721 Point-to-Point Tunneling Protocol uses Generic Routing Encapsulation (GRE) for tunneled data and the error may occur if the network firewall does not permit the GRE protocol traffic. The Generic Routing Encapsulation protocol is used along with Point-to-Point Tunneling Protocol to create virtual private networks between the server and the client or between the clients. You may even encounter this error if the modem driver is not compatible with Windows XP. How to fix the Error 721 To resolve this error, you need to configure the network firewall so as to permit the GRE protocol 47. Also, you need to make sure that the firewall permits the TCP traffic on port 1723. Both of these conditions are required in order to establish the virtual private network connectivity by using Point-to-Point Tunneling protocol. Installing the latest Windows XP compatible driver for the modem can also fix the problem in some situations. Follow Us! Rate this article: ★ ★ ★ ★ ★ Error 721, 0 / 5 (0 votes) You need to enable JavaScript to vote Mail this article Print this article Last updated 11 March, 2016. Related Posts NTLDR is Missing NTLDR stands for New Technology Loader, and it is a program that is usually loaded ... How to Solve Page_Fault_In_Nonpaged_Area in Windows A page fault is an error known as the "0x50 Stop Error," which occurs when ... No Audio Device The no audio device error is commonly encountered on the Windows operating system. The error ... rejohn Long Path Tool help me a lot when i have an issue like file deleting or renaming the file. Also good to use if file name and file extension is too long. fre
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Services Warranty Need help? SupportFAQsModemsDSL ModemsDSL SeriesWhy do I get error 721? FAQ Categories DSL Modems DSL http://www.dlink.com/uk/en/support/faq/modems/dsl-modems/dsl-series/why-do-i-get-error-721 Series DSL-320B Thank you for your feedback. Sorry we couldn't help! Click here for moreFAQs or go to Support. Why do I get error 721? Error 721 is a microsoft windows error code which means thatyour computer cannot reach your ISP. There are several factors thatmay cause this error, please go through this list error 721 totroubleshoot: LED on the front of your modemIs the ADSL light ON/OFF/flashing ?- It should be ON solid, in order to use the internet. If it'sflashing, the modem is currently 'training' meaning searching forthe ADSL service. If it's OFF, the ADSL line is not detected atall. TCP/IP is not bound to your current networkconnectionEven though error 721 vpn you computer communicates with the modem using USB, youcannot access the internet if the protocol TCP/IP is not installedand bound to that connection. Go toControl Panel -> NetworkConnections, right-click on Local AreaConnection and select Properties.Verify if Internet Protocol TCP/IP is installedand is ticked. If not, install it, enable it and pressOK. Incorrect VPI/VCI settingsYour Internet Service Provider, or ISP, should inform you of thesevalues. Verify these numbers, and put them into the field, likeillustration shows. Multi-linkDiasable this option for troubleshooting. This setting is bydefault set to disable. Did you find this useful? 2 people found this useful. Error 2 people found this useful. Thank you. 2 people found this useful. Sorry we couldn't help! Click here for moreFAQs or go to Support. Rank: 1.5 Quick Links Quickly access parts of the D-Link site. ProductAccessoriesNetwork CamerasVideo SurveillanceManaged SwitchesNetwork and Switch AccessoriesNetwork StorageServicesUnmanaged SwitchesNetwork Video RecorderWirelessWhere To BuySupportSupportWarrantyFAQsLearning CentreNeed help?D-Link Services Hot TopicsEyeOn Baby MonitorEyeOn Pet Monitormydlink™Wireless ACIntegrated IP SurveillanceAbout D-LinkAbout D-LinkAward winning technologyCareersContact UsCorporate Milestones and Achievement