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Thread: NO DNS after connecting to OpenVPN ubuntu 16.10

  1. #1
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    Thumbs up NO DNS after connecting to OpenVPN ubuntu 16.10

    SOLUTION:
    Quote Originally Posted by SeijiSensei View Post
    Try editing /etc/resolvconf/resolv.conf.d/head and adding the line
    Code:
    nameserver 8.8.8.8
    to the bottom of that file. Then restart resolvconf or reboot. Any better? If so, and you prefer to use OpenDNS, replace 8.8.8.8 with the appropriate OpenDNS server address.



    OriginalPost :

    Added cert and key file to network manager and was able to connect but no pages would load and wasnt able to ping. I can connect via windows 10 no problem.

    Had to physically disconnect vpn from network manager. The only way i was able to connect, get IP to change and pages to load was select the .ovpn file

    sudo openvpn ~/ovpnfiles/client1.ovpn

    this also stopped working after checking ipleak and a couple other pages. and the only way for me to access the internet again was to
    sudo ifconfig tun0
    down and now I'm here to see what my options are. I'll be checking here frequently to see what some of your ideas may be.

    now when run the .ovpn i cannot load anything and i dont understand why it would work before but not now.


    edit : i edited the VPN connection and changed DNS to opendns servers. Now im currently connected as i type this ipleak.net shows the dns is correct but ip remains the same.


    edit :i removed the VPNs certs from edit connections and added them back in. The following reconnect was successfull and IP change but by the next page load it had stalled
    Last edited by amrasurion; February 21st, 2017 at 02:58 AM.

  2. #2
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    Re: Problems connecting to VPN ubuntu 16.10

    Quick bump.

  3. #3
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    Re: Problems connecting to VPN ubuntu 16.10

    Thread moved to Server Platforms.

  4. #4
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    Re: Problems connecting to VPN ubuntu 16.10

    bump

  5. #5
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    Re: Problems connecting to VPN ubuntu 16.10

    Try using a .conf file in /etc/openvpn instead of NetworkManager. I always prefer that... If you need the connection to be established on boot, a .conf file should do it.

    If you want it manually, put another extension except .conf and use the openvpn command to open the tunnel.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 14.04 LTS 64bit & Windows 10 Pro 64bit

  6. #6
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    Re: Problems connecting to VPN ubuntu 16.10

    My apologies, linux noob here, i havent booted windows in a few days as im trying to learn more.

    by .conf im assuming that you mean the .ovpn configure file if not then im not sure which file your referring to or how to write it.

    i moved host.ovpn to /etc/openvpn
    then sudo /etc/openvpn/host.ovpn

    the connection is established, i see tun0 but all pages time out.
    i have to ifconfig tun0 down to come back and post. Same issue as network network manager just through terminal

    My configuration is as follows :

    host.ovpn
    clien
    dev tun
    proto udp
    remote serverip 1194
    resolv-retry infinite
    no bing
    user nobody
    group nogroup
    persist-key
    persist-tun
    remote-cert-tls server
    cipher AES-128-CBC
    auth SHA256
    comp-lzo
    verb 3
    key-direction 1

    # script-security 2
    # up /etc/openvpn/update-resolv-conf
    # down /etc/openvpn/update-resolv-conf

  7. #7
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    Re: Problems connecting to VPN ubuntu 16.10

    ovpn is the windows extension. For linux use client.conf or basically you can call it whatever you want. If it ends in .conf it will start the connection automatically on boot and on openvpn service restart, otherwise you have to start it manually.

    Do you want the vpn tunnel to be on 24x7? If yes, I would suggest to start like this:
    1. Create new blank file /etc/openvpn/client.conf and type the settings you need from the ovpn file (by hand). I'm saying this because you might have issues with how the text file is handled in windows and linux. They don't handle it in the same way so try avoiding to create/modify text files for linux on windows. Creating a new text file in linux from scratch will make sure you avoid this issue...
    2. Restart the openvpn service:
    Code:
    sudo systemctl restart openvpn.service
    3. Check if tun interface was created:
    Code:
    ifconfig
    4. Check your routing after the vpn is on and your public IP (is it meant to go through the vpn?):
    Code:
    route -n
    curl icanhazip.com
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 14.04 LTS 64bit & Windows 10 Pro 64bit

  8. #8
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    Re: Problems connecting to VPN ubuntu 16.10

    by renaming host.ovpn - host.conf
    and
    Code:
    bobafett@deathstar:~$ curl icanhazip.com
    curl: (6) Could not resolve host: icanhazip.com
    wanted to post this so you could have a look. I'll be retyping the .conf file myself later. and thank you for the timely responses.

    i also did
    scp /var/log/syslog me@server:~/syslog.copy
    Last edited by amrasurion; February 21st, 2017 at 03:10 AM.

  9. #9
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    Re: Problems connecting to VPN ubuntu 16.10

    From the last message it looks like you have no dns, which might be why you are not loading any pages... It doesn't necessarily mean you are not on the internet.

    Try this while the vpn is ON:
    Code:
    ping -c 4 8.8.8.8
    sudo apt-get install traceroute
    traceroute 8.8.8.8
    Try this with both vpn ON and OFF (separate results):
    Code:
    cat /etc/resolv.conf
    dig google.com
    PS. What might be hapenning is the dns servers that need to be used when the vpn is on do not get configured somehow. It could be an issue on the server side but you say windows client works correctly, right? So far it looks like your linux client is not configured with dns correctly after you connect the vpn.
    Last edited by darkod; February 20th, 2017 at 09:57 PM.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 14.04 LTS 64bit & Windows 10 Pro 64bit

  10. #10
    Join Date
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    Re: Problems connecting to VPN ubuntu 16.10

    vpn connected
    Code:
    ping -c 4 8.8.8.8
    PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
    64 bytes from 8.8.8.8: icmp_seq=1 ttl=60 time=272 ms
    64 bytes from 8.8.8.8: icmp_seq=2 ttl=60 time=273 ms
    64 bytes from 8.8.8.8: icmp_seq=3 ttl=60 time=272 ms
    64 bytes from 8.8.8.8: icmp_seq=4 ttl=60 time=335 ms

    traceroute times out


    Code:
    bobafett@deathstar:~$ cat /etc/resolv.conf
    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
    #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
    nameserver 127.0.1.1

    Code:
    bobafett@deathstar:~$ dig google.com
    
    ; <<>> DiG 9.10.3-P4-Ubuntu <<>> google.com
    ;; global options: +cmd
    ;; connection timed out; no servers could be reached

    so that narrows it down. The server is already configured to OpenDNS.

    the original post of client1.ovpn was the first server.
    host.conf directs to a different server but this is the exact same issue i ran into with the last one. Windows worked fine but ubuntu did not.
    Last edited by amrasurion; February 20th, 2017 at 11:13 PM.

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