Error 721 Winxp
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Join INTELLIGENT WORK FORUMSFOR COMPUTER PROFESSIONALS Log In Come Join Us! Are you aComputer / IT professional?Join Tek-Tips Forums! Talk With Other Members Be Notified Of ResponsesTo Your Posts Keyword Search One-Click Access To YourFavorite Forums Automated SignaturesOn Your Posts Best Of All, It's Free! Join Us! *Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden.Tek-Tips Posting Policies Jobs Jobs from Indeed What: Where: jobs by Link To This Forum! Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.Just copy and paste the BBCode HTML Markdown MediaWiki reStructuredText code below into https://support.microsoft.com/en-us/kb/888201 your site. Microsoft: Windows XP Pro Forum at Tek-Tips HomeForumsDesktop SoftwarePC Operating SystemsMicrosoft: Windows XP Pro Forum ERROR 721 VPN thread779-722812 Forum Search FAQs Links MVPs ERROR 721 VPN ERROR 721 VPN CluelessJon (IS/IT--Management) (OP) 5 Dec 03 06:52 Hi,Right I have a VPN server that I connect XP clients to.I cannot for the life of me get past error 721. I had this on another laptop... so i rebuilt it and http://www.tek-tips.com/viewthread.cfm?qid=722812 it connected ok.I have just formatted this win2k machine and installed winXP and the VPN fails to get connected again ( error 721 )My Ip Address is the same as it was before and I have no idea what is causing this. I have had this a couple of times before and a rebuild seemed to solve the problem. I cannot rebuild this machine.Please bear in mind that it is not the router / firewall or anything like that. I have other XP machines here that connect with no problem. The network cable and setup never left my machine during the re installation and all the setting are the same as before.Please does anyone have a fix for this. I have gone through about 100 google news groups and there is no definative fix available.I have however done this1. Click "Start", and then click "Run".2. In the "Open" box, type "regedit" (without the quotation marks) and then press ENTER.3. In Registry Editor, locate the following subkey in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325
-11CE-BFC1-08002bE10318}\000x , where 000x represents the network interface used to establish the VPN connection.4. On the "Edit" menu, point to "New" and then click "DWORD Value".5. Type "ValidateAddress" (without the quotation marks), and then press ENTER.6. Quit Registry Editor.7. Restart your computerPLEASE DOES ANYONE HAVE AN IDEA ??Thanks RegardsJonno
connection. but it gets stuck on Error 721. What is causing that? -- Map Of The Vast Right Wing Conspiracy: http://www.freewebs.com/vrwc/ You know you are in Hell when you http://www.pcreview.co.uk/threads/xp-pptp-vpn-error-721.648443/ have to make a distinction between what is moral and what is legal. Bob, http://serverfault.com/questions/110009/vpn-returning-721-error-despite-successful-logins-to-from-other-locations Mar 30, 2004 #1 Advertisements Marc Reynolds [MSFT] Guest Make sure that all routers and firewalls are configured to pass TCP port 1723 and IP Protocol 47 (GRE). -- Thanks, Marc Reynolds Microsoft Technical Support This posting is provided "AS IS" with no warranties, and confers no rights. "Bob" <> wrote in message news:... > We are at the point where error 721 we attempt to complete the connection. but > it gets stuck on Error 721. > > What is causing that? > > > -- > > Map Of The Vast Right Wing Conspiracy: > http://www.freewebs.com/vrwc/ > > You know you are in Hell when you have to make a > distinction between what is moral and what is legal. > Marc Reynolds [MSFT], Mar 30, 2004 #2 Advertisements Bob Guest On Mon, 29 Mar 2004 error 721 winxp 19:49:17 -0600, "Marc Reynolds [MSFT]" <> wrote: >Make sure that all routers and firewalls are configured to pass TCP port >1723 and IP Protocol 47 (GRE). That has been done. I sit at my desk at home and attempt to connect as the VPN Client. My partner sits at his office where the VPN Server is, and we watch the packets come in. The connection progresses to the point where I get the message about "Verifying username and password". Then after a while I get Error 721. I am logged into my machine as the "vpnclient". The VPN Server has a User named "vpnclient" and has extended permission to that user to connect on the VPN. I have done this PPTP thing several times before so I believe we have everything set up correctly. I just wish Windows would give better diagnostics so I would not have to chase phantoms. What is the most common cause of this problem? -- Map Of The Vast Right Wing Conspiracy: http://www.freewebs.com/vrwc/ You know you are in Hell when you have to make a distinction between what is moral and what is legal. Bob, Mar 30, 2004 #3 Bill Sanderson Guest Here's the doc --troubleshooting at the end: http://support.microsoft.com/default.aspx?scid=kb;EN-US;314076 So--what about those routers, firewalls, etc? You've done it before, so you know what needs to be done--what is diff
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top VPN returning 721 error despite successful logins to/from other locations up vote 2 down vote favorite I am trying to connect a couple of Win XP desktops at a remote site, to the server (SBS 2008) of a central site, using a PPTP based VPN. When I try to connect, I get the error "Disconnected. Error 721: The remote computer did not respond." Here is the strange part: The remote PCs can successfully dial out to another server using VPN. Similarly, I can successfully dial into the central site from my work PC. The remote computers are dialling out through a Netgear DG834Gv4 (latest firmware), and the server is behind a Draytek 2820. I have also tried using the Draytek as the VPN endpoint (instead of it doing pass-through), which again worked successfully from my work PC, but gave the same result from the remote site. I can ping the central site from the remote one, no problem. I can also telnet into port 1723 from the remote site. The central server is a domain controller with AD. At some point in the past, the remote PCs were successfully logged onto the domain, so now log into that (but obviously can't connect). The remote PCs are on a network which contains another SBS 2008 domain/domain controller/AD/server. However, the remote PCs are using the DG834 as their DNS/DHCP/etc. I and my colleagues are totally stumped - we know each end is fine independently, but for some reason they won't work together. We don't think that it's authentication; it doesn't seem to get that far. There's nothing in either router's firewall which would prevent one the remote IP but not my work IP. The MTU of the DG834 has been changed to match the Draytek. Any ideas? vpn pptp share|improve this question asked Feb 5 '10 at 15:28 Andrew C Ok, I've tested the VPN from one of the PCs from the other domain which is at the remote site, and it has the same response - implying that there is a problem with that site as a whole, and not just the PCs trying to connect to the central site. Wh