• A fix for Error 720: A Connection to the remote computer could not be established when trying to connect to a Windows 7 VPN

    by  • June 9, 2011 • windows 7 • 49 Comments

    I was recently re-setting up my Windows 7 VPN server and forgot an essential step that led me to get ‘Error 720: A Connection to the remote computer could not be established’ when trying to connect to it with Windows-based clients. Turns out you might need to assign an IP address range to the VPN server, by doing the following:
    1. Go into Network and Sharing Center > Change Adapter Settings
    2. Right click on Incoming Connection
    3. Click on the Networking tab and double click on the ‘Internet Protocol Version 4 (TCP/IPv4)’ checkbox

    ipv4

    4. Click the ‘Specify IP addresses’ and type an IP range that is in line with your current router setup (e.g. if your LAN is on a 192.168.11.x network, then you might want to set it as follows):

    You should now find, like me, that the VPN works once more! I’ll post up a tutorial on how I got it working and accessible to the public Internet soon.

    About

    .NET developer at thetrainline.com, previously web developer at MRM Meteorite. Awarded a PhD in misbehaviour detection in wireless ad-hoc networks.A keen C# ASP.net developer bridging the gap with APIs and JavaScript frameworks, one web app at a time.

    http://www.paulkiddie.com

    49 Responses to A fix for Error 720: A Connection to the remote computer could not be established when trying to connect to a Windows 7 VPN

    1. Jason D
      August 31, 2011 at 9:58 pm

      Just wanted to note, this fixed my problem. So thanks for this!

    2. WSQ
      September 26, 2011 at 2:36 pm

      Tanks for sharing. That fixs my 720 problem.

    3. Marcus
      December 18, 2011 at 4:51 am

      I think I love you… After 5 hours of searching, this solved my error 720: A connection to the remote computer could not be established. You might need to change the network settings for this connection. Thank you

    4. Orcun
      February 11, 2012 at 4:23 pm

      Thank you, I have been searching the web for hours before I came across your solution, and it solved my problem.
      Thank you once again…

    5. Russell Richardson
      February 26, 2012 at 8:20 am

      THANK YOU :D I was looking forever!!

    6. jason
      March 25, 2012 at 3:17 pm

      cant find the ‘incoming connection’

    7. jboby93
      May 23, 2012 at 3:26 am

      I don’t normally reply to guides like this, but this error had been bugging me for a LONG time. I have a Windows Server 2003 computer set up, and VPN would work sometimes, and when it didn’t it was error 720. This guide fixed the problem and it connected on the first try. Thanks!

    8. Charlie L
      July 2, 2012 at 6:36 pm

      Thank you, thank you, thank you. After 2 days of bashing away at setting up VPN you solved the 720 error.

    9. Larry
      August 10, 2012 at 10:19 am

      Fixed my problem, thanks!

    10. August 16, 2012 at 8:00 pm

      Ditto to what Charlie said I was ready to bash my head against the wall trying to fix this error.

    11. September 6, 2012 at 10:18 am

      My savior!! I was looking for that manipulation for about 2 days, fortunately you were there!
      Thanks a lot man!

    12. Lin
      September 28, 2012 at 2:30 am

      Thank u so much, i reach all google web and thanks to u i can fix my problem =)) <3

    13. Amit
      September 30, 2012 at 11:39 pm

      True hero! Could you please explain WHY does this fix this issue?

    14. October 2, 2012 at 3:27 am

      I recently started having this issue (seemingly out of no-where); just thought I’d post my fix. I have SuperAntiSpyware on my computer (I’m not advertising for them, just don’t want anyone to go through all the long hours I went through), there’s a tool in the “Repairs” section of SAS called “Repair broken Network Connection (Winsock LSP Chain)”. As the program states, please use with caution. Once I ran that, I had to restart as it did something in the registry. Once it came back up, BAM, fixed; after about a month of trying to fix it… BTW, it says it’s only for Window Xp (the tool), but I used it on my Windows 7 Ultimate 64-bit, no issues. Hope this helps :-)

    15. Janez
      October 5, 2012 at 11:15 am

      Thanks a lot, this fixed my problem.

    16. October 24, 2012 at 7:36 am

      Thank you so much, after searching the wep for RAS-protocols and god knows what it was this simple!

    17. fumaric
      October 29, 2012 at 10:01 pm

      I did not think this would matter but I said why not, it won’t hurt anything… so much for thinking windows would just do it.

    18. bheems
      November 20, 2012 at 10:01 pm

      Thank you, I followed the above steps but when it got to the typing the IP address am still clueless on how to get the IP address. Please where do I get the IP address to put there? I await a reply. Anyone please!

    19. joudar11
      November 30, 2012 at 8:37 pm

      Thanks a lot bro. :) Helped to solve my 720 ;) Good job, keep going!

    20. hesham
      December 10, 2012 at 7:30 pm

      thaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

    21. Cromag
      December 27, 2012 at 8:02 pm

      @bheems. you need to know your routers dhcp scope. typically on a home router it is either 192.168.1.0-192.168.1.254 or 192.168.0.1-.254 you can find out which your uses by going to a command prompt and typing in ipconfig . It will give you your ip address and you can look at it for a reference. Whatever your ip address is, use that same scheme when typing into the ip range and just go up a few numbers. For instance if your ipconfig says your ip is 192.168.1.9 then type in 192.168.1.15 in the From and in the To type in 192.168.1.20 . That will give you 6 addresses. Of course those ip’s are examples only so if your ip scheme is different those I provided will not work . Hopefully you get the idea though.

      @Paul. You da man. Thanks for this bit of info. No walkthroughs I’ve found ever mention just supplying a range but after doing so it works beautifully. Now I can connect from my work to my home and not get blocked by our corporate filter policies!

    22. Oskar
      January 7, 2013 at 3:19 pm

      Thanks a lot! =)

    23. JH
      January 16, 2013 at 7:03 am

      18 months later after the article was originally posted, and still incredibly helpful! Solved my 720 problem in seconds, no extensive Googling or hairpulling required — thank you!!

    24. Marcus C
      January 19, 2013 at 8:23 pm

      Still insanely useful! Completely forgot about this step!

    25. January 21, 2013 at 1:56 pm

      Thanks for all the messages – glad to hear it’s still useful!

    26. Alexander G.
      January 24, 2013 at 2:30 pm

      2 years on and this blog page is still helping people out

    27. kejung
      February 11, 2013 at 4:09 am

      My client connected allready but , why ? no connection access ..

    28. February 24, 2013 at 8:38 pm

      This solves the problem. Most of the servers works with the “normal” VPN configuration, but some servers were killing me with the 720 issue. And it seems that this problem is increasing, even with Windows 8 on clean installs !
      Last week I had this problem with a brand new Windows 7 machine. Today with a brand new Windows 8 machine.
      This blog was THE solution, it works !!!! I don’t want to know why, this solution is simple and working.
      Thanks a million !

    29. Pingback: http://www.paulkiddie.com/2011/06/a-fix-for-error-720-a-connection-to-the-remote-computer-could-not-be-established-when-trying-to-connect-to-a-windows-7-vpn/ | Just for my little world of programming

    30. March 11, 2013 at 9:32 am

      Error 720 was fixed, now “Error 629: The connection was closed by the remote computer” is appear.
      How to fix that?

    31. Robert
      March 14, 2013 at 6:21 pm

      Thank you so much. I had been fighting with the VPN server on windows 7 for days. I use a VPN for my iphone when I’m on public WIFI o keep my data safe and when I replaced my old windows XP system that i use for a server with a Windows 7 I couldn’t get it to work right. This was the trick wish some other help sites would show this.

    32. aditya
      June 12, 2013 at 1:31 pm

      hey how to specify the ip address where can i find it (from step 4) reply ASAP

    33. ADITYA
      June 12, 2013 at 1:34 pm

      how can i get the IP address ??

    34. Eoghan
      June 18, 2013 at 11:32 pm

      I have been having this error with an internet 3G dongle on a new laptop with Windows 8. I can connect to wireless networks with no problems but the dongle ain’t working. It was working on the dongle for a few weeks but suddenly stopped. I tried another Dongle too and same problem. I have tried finding the IP address with the command prompt but unfortunately it only comes up when you are connected to the internet and the problem is that i cant connect in the first place because of Error 720. I really do not know what to do after googling for 2 days on this problem. Also in my control panel there is only one field to type in the IP address and there is no From or To option probably because it is a new laptop and Windows 8. These are the only two options
      - Obtain an IP address automatically
      - Use the following IP address:
      IP address . . . .

      If anyone can help me out i would very much appreciate it, its such a strange and frustrating error. :P
      Thanks, Eoghan.

    35. David
      July 23, 2013 at 5:01 am

      Fixed the issue for me. Thanks

    36. Mirek
      August 1, 2013 at 6:06 pm

      Very help full :)

    37. August 20, 2013 at 3:59 pm

      Thanks so much,, this solve my problem…

    38. Ang
      September 3, 2013 at 10:20 pm

      @Eoghan Same problem here… It’s frustrating. D:

    39. rahul
      September 18, 2013 at 12:11 pm

      sir, i am using a windows 8 and 702 A error is shown , i am unable to connect to internet . what should i do ?

    40. Mauricio
      October 1, 2013 at 4:11 am

      Simply and perfect! nice post man! many thanks!

    41. John Click
      October 7, 2013 at 9:18 am

      That Error 720 thing has been a mystery to me for a while. Nice work. Wish I had found this sooner. I have since moved on to using something different altogether. I’m hooked on RHUB’s remote support b/c it’s easy to use and very secure.

    42. sougu
      October 16, 2013 at 9:05 am

      sry THIS PROBLEM APPEARS WHEN I CONNECT MY IDEA NETSETTER E303D IN WCDMA NETWORK(NOT IN GSM) USING WINDOWS DIAL UP .CAN YOU PLEASE FIND A SOLUTION FOR THIS IAM TOOO TIRED OF IT

    43. Jay Denis
      October 22, 2013 at 8:09 pm

      Thank you so much for creating this post! :)

    44. alex
      October 31, 2013 at 10:10 am

      Trying so many solution out there. This is the only one that worked for me. Thank you.

    45. alex
      October 31, 2013 at 10:10 am

      Tried so many solution out there. This is the only one that worked for me. Thank you.

    46. Randy
      November 10, 2013 at 5:16 pm

      Thank you !

    47. satish
      November 26, 2013 at 4:30 am

      I am having the same issue
      when I am using Tata Photon it is getting below error I tried reset IP and Local Lan working fine.
      720: A Connection to the remote computer could not be established when trying to connect to a Windows 7

    48. Mohammad Omar
      November 27, 2013 at 7:48 pm

      I have created l2tp over ipsec access vpn between windows 2008 and tmg server 2010… but when i cant connect from windows 2008 to tmg server 2010… Note: I have used dhcp to assign ip addresses to vpn clients automatically.

    49. Carlo
      December 2, 2013 at 8:21 pm

      I got it connected but I have no internet connection with my VPN.

      Anyone have the same issue?

      Help please

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