Pptp Windows Xp Error 721
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Error 721 Vpn Windows Xp
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a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Courses Vendor Services Groups Careers Store Headlines Website Testing Experts Exchange > Questions > Error 721, PPTP VPN not connecting for some clients. Want to Advertise Here? Solved Error 721, PPTP VPN not connecting for some clients. Posted on 2007-05-22 Windows Networking VPN Software Firewalls 3 Verified Solutions 10 Comments 7,057 Views Last Modified: 2011-10-03 I have two XP Pro laptops connecting to a 2003 SBS PPTP VPN wirelessly. https://support.microsoft.com/en-us/kb/271731 One can connect, the other can't. It stops at "verifying username and password" with error 721 "the remote computer did not respond". Identical settings on the VPN connections, ports 1723 and protocol GRE are allowed on all firewalls. Client used to be able to connect, but hasn't for 2 weeks now. I have heard rumors that someone else on our network is having similar issues. Most recent Intel ProSet driver installed hasn't fixed it. Any suggestions on https://www.experts-exchange.com/questions/22587535/Error-721-PPTP-VPN-not-connecting-for-some-clients.html where to go from here? 0 Question by:artatomic Facebook Twitter LinkedIn Google LVL 51 Best Solution byKeith Alabaster Peculiar - GRE pass through normally works or doesn't, dont often see it work for 30 seconds then stop if something is blocking it. Might be worthwhile also installing Ethereal (they call it wireshark Go to Solution 10 Comments LVL 77 Overall: Level 77 VPN 36 Windows Networking 28 Software Firewalls 10 Message Active today Expert Comment by:Rob Williams2007-05-22 A 721 error is almost always blocked GRE. If some users can connect then the issue is not likely at the server end. Some things to look at locally: - having 2 NAT devices such as a router and a modem that is a combined router an modem. if so try connecting directly to the modem. (Make sure windows firewall is enabled, and all virus and Windows updates are current) - other software firewalls and security such as Windows One Care, Trend Micro's Office Connect, Symantec's Internet Security suite or their anti-virus software with "Internet Worm Protection" enabled - Some ISP's block GRE, and some routers and modems do not support GRE/PPTP pass through, has the location changed? 0 LVL 51 Overall: Level 51 Software Firewalls 28 Windows Networking 25 VPN 9 Message Expert Comment by:Keith Alabaster2007-05-22 If the first user logs off the vpn, can the second then get
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 http://www.pcreview.co.uk/threads/xp-pptp-vpn-error-721.648443/ is legal. Bob, 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 we attempt to complete the connection. but > it gets stuck on Error 721. > > What is causing that? > error 721 > > -- > > 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 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 error 721 vpn 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 different about the hardware/software in this set of links? "Bob" <> wrote in message news:... > On Mon, 29 Mar 2004 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