Error 721 Pptp
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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 pptp error 619 the problem. The Problem: It can take up 6 retries for any remote user to successfully pptp error 800 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 pptp port 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
Error 721 Vpn Windows Xp
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 error 721 directv 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 whe
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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 https://www.experts-exchange.com/questions/22587535/Error-721-PPTP-VPN-not-connecting-for-some-clients.html for a Full Time Job Ways to Get Help Expand Search Submit http://www.sevenforums.com/network-sharing/93003-vpn-gurus-error-721-a.html Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines 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 error 721 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 "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 error 721 pptp 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 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 Windo
Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks. Windows 7 Help Forums Windows 7 help and support Network & Sharing » User Name Remember Me? Password Advanced Search Show Threads Show Posts Advanced Search Go to Page... Windows 7: VPN Gurus: error 721 23 Jun 2010 #1 BigJohnny Win7 8 posts VPN Gurus: error 721 hi, i wanted to implement a vpn connection using microsoft technology. i enabled ras on the host computer which has win 7. the host computer sits behind a di-524 router, so i've enabled pptp pass through and ipsec pass through, moreover, i set a port forwarding for 1723 and 500 (both tcp and udp) to the host computer. from the guest computer, who sits in a different subnet and uses win xp, i used telnet to verify that the host server can be reached, there was no problem reaching it. then i verified the generic routing encapsulation (gre) is set too, so i've used pptpclnt and pptpserv, and gre check complete successfully. still, when i set a vpn dialup connection, i get error 721 (after verifying username and password). any vpn guru can help me here? thanks. My System Specs OS Win7 BigJohnny View Public Profile Find More Posts by BigJohnny . 23 Jun 2010 #2 chev65 Windows 7 Ult, Windows 8.1 Pro, 9,149 posts San Diego I received error 721, which says the remote computer is not responding. Cause: This issue can occur if the network firewall does not permit GRE traffic (IP protocol 47). PPTP uses GRE for tunneled data. Solution: Configure the network firewall between the VPN client and the server to permit GRE. In addition, make sure that the network firewall permits TCP traffic on port 1723. Both of these conditions must be met to establish VPN connectivity by using PPTP. For more information, see article 888201, "You receive an "Error 721" error message when you try to establish a VPN connection through your Windows Server-based remote access server" in the Microsoft Knowledge Base. Troubleshooting remote access VPNs: Virtual Private Network (VPN) This is what comes up for error 721. Hope it helps. My System Specs Computer type PC/Desktop System Manufacturer/Model Number Home built OS Windows 7 Ult, Windows 8.1 Pro, CPU Q9650-4.275GHz, E8600 4.5GHz, E6750-3.8GHz Motherboard Evga 780i FTW Memory G.Skill PC2 9600 1200Mhz 5 5 5 15 2T Graphics Card GTX480 Sound Card Asus Xonar D2 Monitor(s) Displays HannsG Scree