Error 721 Protocol Wifi
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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 earlier versions. The exact error 721 description may vary 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 https://support.microsoft.com/en-us/kb/888201 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 http://www.tech-faq.com/error-721.html 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 How to Fix the Unmountable Boot Volume Error Message in Windows XP A common error that occurs with the Windows XP operating system (OS) that results in ... 0x80070035 As the number of home computer users creating local networks increases, so does the number ... Error 1706 Error 1706 is a Microsoft error that is sometimes generated when you install a Windows ... 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 Index Audio-Video Databases Electronics File Compression File Conversion Gaming Graphics Hardware Internet IT Management Macintosh Microsoft Windows Mobile Devices Networking Programming Science Security Telephony Unix by Tech-FAQ Copyright ©&nb
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 https://www.experts-exchange.com/questions/22587535/Error-721-PPTP-VPN-not-connecting-for-some-clients.html Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions https://supportforums.cisco.com/discussion/9632931/vpn-gre-pptp-error-721 > 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 7,038 Views Last Modified: 2011-10-03 I have two XP Pro laptops connecting to a 2003 SBS PPTP VPN wirelessly. One can connect, the other can't. It stops at error 721 "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 where to go from here? 0 Question by:artatomic Facebook Twitter LinkedIn Google error 721 vpn 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 2 days ago 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 on OK? Are you running ISA on the SBS box? 0 Message Author Comment by:artatomic2007-05-22 RobWill: It may very well
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