Error 721 Remote Computer Did Not Respond Vpn
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I have FINALLY resolved an ongoing issue with our VPN connections that we have been experiencing for over a error 721 vpn windows xp year now. I will share these findings with this forum in case
Error 721 Directv
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, a
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 Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > VPN question - "error 721: Remote computer did not respond" Want to Advertise Here? Solved VPN question - "error 721: Remote computer http://www.pcreview.co.uk/threads/error-721-finally-resolved.1574450/ did not respond" Posted on 2005-03-02 Software Firewalls Hardware Firewalls Networking 3 Verified Solutions 11 Comments 34,429 Views Last Modified: 2013-11-16 I'm trying to setup VPN against a Windows 2003 server. Client is XP pro. The server is behind a router that run NAT. When I'm connecting to the VPN server directly to the internal IP I connnect without problems. https://www.experts-exchange.com/questions/21334514/VPN-question-error-721-Remote-computer-did-not-respond.html Our ISP have setup the NAT on the router to temporarily allow all IP traffic to this external IP. But when I try to VPN connect to external IP it hangs with message "verifying username/password" and then I get "error 721: Remote computer did not respond". Any ideas what might be wrong? Are any particular settings on the router needed to make this work? 0 Question by:rj2 Facebook Twitter LinkedIn Google LVL 16 Best Solution bysamccarthy You will need to verify that the ISP is letting the traffic IN from the external IP. You need to allow port 1723 TCP for PPTP and GRE, IP Protocol 47. You will also need to port forward 1723 to the Go to Solution 11 Comments LVL 16 Overall: Level 16 Networking 6 Software Firewalls 4 Hardware Firewalls 3 Message Accepted Solution by:samccarthy2005-03-02 You will need to verify that the ISP is letting the traffic IN from the external IP. You need to allow port 1723 TCP for PPTP and GRE, IP Protocol 47. You will also need to port forwa
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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 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 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 678 Error 678 is an error that is reported when a remote system does not respond ... Device Driver has corrupted the executive memory pool If you receive an error message which reads: Windows error "Device Driver has corrupted the ... Error 1603 When installing software that is packaged with the Windows Installer, users may get an error ... 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 © 2016 Independent Media | Reference the Tech-FAQ | Privacy Policy | Site Index Windows ErrorsError Number: 0x800CCC0EBluescreen 0x0000007bCompile Error in Hidden ModuleError 0x0000007eError Number 0x80072ee2Windows Media Player Error 0xc00d1199How to S