Ras Error 721
I have FINALLY resolved an ongoing issue with our VPN connections that we have been experiencing for over a year now. I will share these findings with this forum in case others can benefit from our situation. First let me explain the problem. The Problem: It can take up 6 retries for any remote user to successfully created a remote PPTP connection to our servers. Whenever we try to connect it display the following message: Verifying username and password... And it sit there displaying this message for about 30-40 seconds, then it says: "error: 721 The remote computer did not respond." Network Setup: We have two netopia routers on our network. They both have their own separate WAN connection (we use a lot of bandwidth, hence the need for two WAN connections). One RAS server is configured to use one router as it's gateway, and the other RAS server uses the second router as it's gateway. When PPTP connections are made, the connection comes in and back out the same router (this I made sure). We use a multi-NAT for routing service request to internal servers. FTP, WWW, RDP, PCAnywhere, SSL, PPTP, MAIL, etc...all these services are routed to internal servers/workstations. We have approximately 32 public IP addresses, hence why we use Multi-NAT for routing public services to internal servers. Everything works perfectly, EXCEPT PPTP (VPN) connections. We have struggled with this for a year now. For whatever reason, it struggles to make a successful connection to our RAS servers. Like I said, it can take up to 6 retries to successfully connect to our RAS servers (up to 30 retries if the remote user is behind a Linksys router). The Fix: Today, I decided to try something different. I decided to use the router's public IP address for PPTP requests, instead of one of the other public IP addresses our ISP assigned us, and simply forward PPTP (TCP 1723 & IP 47) requests to the internal servers. Therefore, the only difference is that I am using a pingable IP address which happens to belong to the router instead of using one of the public IP addresses I have NATed. For whatever reason, this solved our problem with connecting to the RAS server. We no longer have to retry up to 6 times to successfully connect. Conclusion: I have NO clue as to why I have to use the router's public IP address rather than any of the other 31 public IP addresses our ISP assigned to us. This was ONLY an issue with the PPTP service. All the
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 http://www.pcreview.co.uk/threads/error-721-finally-resolved.1574450/ 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 http://www.tech-faq.com/error-721.html 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 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 ... NMI Parity Check/Memory Parity Error Windows Operating System (OS) users may encounter the NMI Parity Check/Memory Parity Error during the ... Error 80072ee7 A computer commonly displays Windows Update error 80072ee7 when checking for Operating System (OS) updates ... 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 Micros
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Svenska Türkçe Українська Login Remember Me • Forgot Password? Not Yet Registered? Click here to signup... View Cart (0) Toggle navigation Home Announcements Knowledgebase Network Status Affiliates Contact Us Account Login Register ----- Forgot Password? Knowledgebase Portal Home Knowledgebase Categories L2TP Setup 5 Open VPN 6 PPTP Setup 6 SSTP Setup 2 VPN Connection Errors 35 Categories L2TP Setup (5) Open VPN (6) PPTP Setup (6) SSTP Setup (2) VPN Connection Errors (35) Categories L2TP Setup 5 Steps to Setup L2TP VPN Connection Open VPN 6 Steps to setup Open VPN Connection PPTP Setup 6 SSTP Setup 2 Steps to Setup SSTP VPN Connection VPN Connection Errors 35 Solution of common Errors Most Popular Articles Error 732 Error 732: The PPP negotiation is not converging.Cause:1. The negotiation of PPP... Error 721 Error 721: Remote PPP peer or computer is not responding.Resolution: If you have tried many thing... Error 720 Error 720: No PPP control protocols configured.Resolution:1) make sure both RAS server and client... Error 619 Error 619: 1. The port was disconnected (or Error 645, Dial-Up Networking could not complete the... Error 628 Error 628: The port is disconnected or The connection was terminated by the remote computer... Powered by WHMCompleteSolution Support My Support Tickets Announcements Knowledgebase Downloads Network Status Open Ticket Copyright © 2016 Shazam Co.. All Rights Reserved.