Error 721 Remote Computer Did
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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 error 721 vpn windows xp the problem. The Problem: It can take up 6 retries for any remote user to successfully
Error 721 Directv
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 other services work perfectly with the router's Multi-NAT table. In the end I don't know wh
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 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 http://www.pcreview.co.uk/threads/error-721-finally-resolved.1574450/ 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. 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" https://www.experts-exchange.com/questions/21334514/VPN-question-error-721-Remote-computer-did-not-respond.html 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 forward 1723 to the Nat IP address of the Windows 2003 server doing the VPN. So, your external client sends a VPN request to the external IP. The router sees this on port 1723 and then will forward that on to the IP address of your server. 0 LVL 10 Overall: Level 10 Message Author Comment by:rj22005-03-02 Well, the ISP says that they believe everything is ok on the
| Address Book | Member List | Search | FAQ | Ticket List | Log Out Disconnected. Error 721. Remote computer http://forums.isaserver.org/Disconnected%25_Error_721%25_Remote_computer_did_not_respond%25/m_130177900/tm.htm did not respond. Users viewing this topic: none Logged in as: Guest Tree Style Printable Version All Forums >> [ISA Server 2000 Firewall] >> VPN >> Disconnected. Error 721. http://itknowledgeexchange.techtarget.com/itanswers/vpn-error-721-2/ Remote computer did not respond. Page: [1] Login Message << Older Topic Newer Topic >> Disconnected. Error 721. Remote computer did not respond. - 30.Aug.2003 6:19:00 PM scriven_j error 721 Posts: 8 Joined: 30.Aug.2003 From: London Status: offline Hi,I am trying to get a VPN running between a client machine (Windows XP SP1) and a server machine (Windows 2000 SBS SP4) using ISA.I keep getting this 721 error though.The machine seems to connect and states that it is 'verifying username & password' but then it sits their for about error 721 remote a minute and then comes up with the error.I am able to connect to the ISA machine using Terminal Services (Remote Desktop Connection) without any problems.I have run the wizard and it has created two IPSec & two PPTP packet filters but I cannot see what else I am missing.The internet connection for the server is via an ADSL USB modem.Any advice or suggestions would be much appreciated ! Thanks !Jon [ August 30, 2003, 06:26 PM: Message edited by: scriven_j ] Post #: 1 Featured Links* RE: Disconnected. Error 721. Remote computer did not re... - 31.Aug.2003 7:55:00 PM tshinder Posts: 50013 Joined: 10.Jan.2001 From: Texas Status: offline Hi Jon,Does your ISP allow inbound VPN connections?Thanks!Tom (in reply to scriven_j) Post #: 2 RE: Disconnected. Error 721. Remote computer did not re... - 1.Sep.2003 10:40:00 AM scriven_j Posts: 8 Joined: 30.Aug.2003 From: London Status: offline I have worked it out. I was sniffing the wrong lamppost !The VPN works fine - The place where I was trying to test it was bl
? Ask a question, help others, and get answers from the community Discussions Start a thread and discuss today's topics with top experts Blogs Read the latest tech blogs written by experienced community members Problem establishing VPN connection with remote server Stevesz 2015 pts. Tags: Thanks! We'll email youwhen relevant content isadded and updated. Following Follow error 721 Thanks! We'll email youwhen relevant content isadded and updated. Following Follow VPN issue Thanks! We'll email youwhen relevant content isadded and updated. Following Follow Windows XP SP3 One machine is having a problem establishing a VPN connection with a remote server. It hangs on verifying the username and password. Another machine on the same network, using the credentials of the user who has the problem connects straight away. This has led me to believe that the problem is entirely with the one machine. I've updated the NIC driver with no success. I have created a new VPN connection but get the same results. I have even shut down the firewall on the local machine without gaining anything. This connection was working in the past. I have not been able to put a finger on the problem and I am looking at doing a complete re-install of the OS right now. The error returned is "721: The remote computer did not respond." I did check ADUC and the user is allowed to connect remotely. Does anyone have any suggestions?Software/Hardware used: Windows XP SP3, Microsoft VPN Client Asked: February 25, 20119:40 PM Last updated: June 27, 20134:57 PM Related Questions Cisco VPN Client error message Cisco VPN Concentrator 3000 Issue VPN Problems with SBS 2003 Cisco pix vpn access How can i connect my windows XP machine to a remote office? Answer Wiki Last updated: June 27, 20134:57 PM GMT Michael Tidmarsh48,715 pts. History Contributors Ordered by most recent Michael Tidmarsh48,715 pts. Mariodlg2,790 pts. Thanks. We'll let you know when a new response is added. I had similar troubles when I installed a program to manage voip comunication inside the company. This software had installed another network