Error 721 Dial Up Xp
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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 Microsoft Windows XP from
Error 777 Laptop Windows 7
earlier versions. The exact error 721 description may vary from 'Remote PPP peer
Error Id=777 D-link
is not responding' to 'the remote computer is not responding'. Cause of Error 721 Point-to-Point Tunneling Protocol uses Generic Routing error id 777 d link modem 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 https://support.microsoft.com/en-us/kb/888201 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 http://www.tech-faq.com/error-721.html 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 Error 1327 Invalid Drive Error 1327 invalid drive can be triggered on a Windows computer when installing software that ... How to Flip a Computer Screen Upside Down Windows Hot Keys allow computer users to conduct specific Windows operating system (OS) functions without ... Error Number 0x80072ee2 The Microsoft Corporation has designed the Windows Operating System (OS) to query the Microsoft Update ... 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. frederik "Long Path Tool" is very helpfull Search for: ReferenceSoftware Tutorials Unit Conversion Practice Tests Web Tools Site In
Error Code List) A listing in numeric order of Microsoft Dial-Up Networking (DUNS) Error codes with the Microsoft error message follows. If there's a hyperlink, you can follow it for more information on what to do about the http://modemsite.com/56k/dunserror.asp error. If you are getting an error that does not have more information here, http://www.pcreview.co.uk/threads/error-721-dial-up-connection-wtih-a-modem.1727931/ please let me know! The list includes error codes for Windows 95, 98, Me, NT, 2000, XP, and Vista. In later versions of operating systems (NT, 2000, XP and Vista) some of the errors can occur for connections other than traditional dial-up modem connections: they may occur with DSL and VPN (virtual private networking) connections that do not error 777 involve dial-up. NOTE: Some solutions indicate to re-install DUNs and/or TCP/IP. See this Microsoft KB article for Win 95/98 instructions to Remove & Re-install DUNS & TCP/IP.Newer versions of Windows don't allow DUNS uninstall: see Reset DUNS (TCP/IP) in Windows 2000 & XP. Windows Vista: Dialing directly from the 'Connect To' menu or other shortcuts will not display DUNs error codes - instead, particularly large and unhelpful dialog boxes are shown as detailed error id 777 here. In order to see any DUNs error codes, you must dial from the 'Manage Network Connections' Window. ALSO SEE: Connectoids. In many cases, DUNs Errors can be solved by correcting the properties for your dial-up networking connections. ERROR 50 - The request is not supported. 600 - An operation is pending. 601 - The port handle is invalid. 602 - The port is already open. 603 - Caller's buffer is too small. 604 - Wrong information specified. 605 - Cannot set port information. 606 - The port is not connected. 607 - The event is invalid. 608 - The device does not exist. 609 - The device type does not exist. 610 - The buffer is invalid. 611 - The route is not available. 612 - The route is not allocated. 613 - Invalid compression specified. 614 - Out of buffers. 615 - The port was not found. 616 - An asynchronous request is pending. 617 - The port or device is already disconnecting. 618 - The port is not open. 619 - The port is disconnected. 620 - There are no endpoints. 621 - Cannot open the phone book file. 622 - Cannot load the phone book file. 623 - Cannot find the phone book entry. 624 - Cannot write the phone book file.
I have w2k pro SP4 and i can't dial-in to my internet provider. When I dial-up then he make conteact with the server, then it is verivying my username and password and then i get an error 721. I already checked with servicedesk. And it looks like that my computer sends my phoennumber as a password. But i for sure typed the generated password in. Can somebody help me to solve this problem? i am already thinking about downgradgin to w98 se 'Marieke, Mar 30, 2004 #1 Advertisements Robert L [MS-MVP] Guest quoted from http://www.ChicagoTech.net Error 721: Remote PPP peer or computer is not responding. If you have tried many thing other people suggest like rebooting, reloading hardware and re-installing the VPN or dial in connection, you still get the same problem. I will suggest to check the router settings and make sure TCP Port 1723, IP Protocol 47 (GRE) are opened. Also make sure that the router has the PPTP enabled and not firewall block the traffic. On the RAS server, check the DHCP settings. -- For more and other information, go to http://www.ChicagoTech.net Don't send e-mail or reply to me except you need consulting services. Posting on MS newsgroup will benefit all readers and you may get more help. Robert Lin, MS-MVP, MCSE & CNE Networking, Internet, Routing, VPN, Anti-Virus, Tips & Troubleshooting on http://www.ChicagoTech.net This posting is provided "AS IS" with no warranties. "'Marieke" <> wrote in message news:1115401c4165c$dfc1d140$... >I have w2k pro SP4 and i can't dial-in to my internet > provider. When I dial-up then he make conteact with the > server, then it is verivying my username and password and > then i get an error 721. I already checked with > servicedesk. And it looks like that my computer sends my > phoennumber as a password. But i for sure typed the > generated password in. > Can somebody help me to solve this problem? i am already > thinking about downgradgin to w98 se Robert L [MS-MVP], Mar 30, 2004 #2 Advertisements Show Ignored Content Want to reply to this thread or ask your own question? It takes just 2 minutes to sig