Ubuntu Networking :: OpenVPN Connection - Unable To Correctly Connect ?
Sep 7, 2010
I have setup an OpenVPN server on Ubuntu server. I am able to connect with Windows clients. I am, however, unable to correctly connect using Ubuntu.
If the router firewall is blocking the pings to keep the connection alive, then the connection initially does not work, but will work after the first timeout and reconnect. If the firewall does not block the pings then the initial connection attempt never times and therefore the connection does not work.
Attached is the readout from the client.
The first attempt gives error ERROR: Linux route add command failed: external program exited with error status: 7
Successive attempts work, they just time out every two minutes.
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May 16, 2010
I an unable to connect to an openvpn connection in ubuntu karmic. I have installed openvpn , I added the user certificate, CA certificate , Private key and the conf file in the /etc/openvpn directory. Also followed the steps given here [URL]..community/OpenSSL under "Importing a Certificate into the System-Wide Certificate Authority Database" , but still when I try openvpn --config linux_client.conf I get the following error.
Mon May 10 21:58:57 2010 /usr/bin/openssl-vulnkey -q -b 2048 -m <modulus omitted>
Mon May 10 21:58:57 2010 LZO compression initialized
Mon May 10 21:58:57 2010 Control Channel MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ]
Mon May 10 21:58:57 2010 Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ]
Mon May 10 21:58:57 2010 Local Options hash (VER=V4): '41690919'
[Code]...
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Apr 5, 2010
i have some problems with configuring openvpn tunnel connection to my openvpn server. I'm using static-key tcp connection. Network manager always said to me that connection could not be established. Also, when i try to run openvpn from terminal, i got some strange permissions problem:
Code:
openvpn --config config.ovpn
Mon Apr 5 15:48:37 2010 OpenVPN 2.1_rc19 i486-pc-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] built on Oct 13 2009
Mon Apr 5 15:48:37 2010 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Mon Apr 5 15:48:37 2010 /usr/sbin/openvpn-vulnkey -q moj.key
[code]....
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Jun 4, 2011
As I reported in this bug:[URL].. root is not able to start an openvpn-connection via the "nmcli"-command to control NetworkManager, whereas my user does not run in any problems with this command. My error output when starting as root is as follows:
Code:
# nmcli con up id "my-openvpn"
Active connection state: unknown
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/5
state: VPN connecting (need authentication) (2)
Error: Connection activation failed: no valid VPN secrets.
Does anybody know what to do about this strange behaviour? The vpn-secret seems to be stored in the gnome-keyring and in the /etc/NetworkManager/system-connections/my-openvpn simultaneously. But root cannot access any of these. Why this is important? I'm trying to set up a dispatcher-script to automatically start openvpn on eth-connection. but this does throw the exact error from above (no valid vpn secrets..).
[Code]...
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Mar 3, 2010
I am unable to connect to my wireless connection! i have put in all the correct details and password but the connect button is greyed out so I am unable to click on it.
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Oct 30, 2010
I ve just install ubuntu 10.10 and am unable to connect to wireless connect. I was able to connect on the try ubuntu before install option. I have dual booted Windows 7 and Ubuntu 10.10. I have tried connecting without the WEP key and still no luck. Just found it strange that connect on try it but not after full install.
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Feb 24, 2011
I was able to connect linux server on windows through putty.But now i am unable to connect that,I can able to ping that IP.SSH daemon is also running. shall i need to change anything in configuration file...
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May 8, 2010
I have problem in making connection to my vpn server I can make connection from windows xp to that but can not open any website and I can not ping 172.16.10.1 when connection established.
These are my configuration files:
server config file:
Quote:
client configuration file:
Quote:
And this is my server syslog tailed file:
Quote:
And I added this routing to /etc/rc.d:
Quote:
And this is my iptable:
Quote:
And vpn connection is lost after establishing a lot.
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Jan 11, 2010
I recently installed Ubuntu 9.10 on my Dell Inspiron 1545 64-bit laptop. Before that I used Windows7. In Windows, the internet connection worked perfectly well. But after installing Ubuntu, I am unable to connect to the internet. The network-manager applet finally says that "You are disconnected". When I do the "ifconfig", I got no IP address.
So, I installed Ubuntu 9.04 in the same system. But the problem persists.
I gone through many posts in this forum but nothing was useful.
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Dec 13, 2010
I did a clean install of the latest version of Ubuntu. For some reason, there are still internet-issues. When I tried out the following command
Code:
telnet
open ftp.microsoft.com 21
I got
Code:
telnet: Unable to connect to remote host: Connection timed out
Also, during install of the new ubuntu, it was unable to reach the repos for downloading. Odd thing is that I can go online, and that when I type 'ftp.microsoft.com' in my browser, it displays the file-hierarchy.
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Dec 5, 2010
I have just installed ubuntu 10.04 using the wubi installer to dual-boot my machine. Under ubuntu, I am not able to connect to the internet or my router. Everything works fine under windows. I have tried to find relevant information in the forums, but nothing seems to work for me. I have tried disabling ipv6, setting a static ip, but no go. ifconfig shows no IP, dhclient results in no DHCP offers and pinging my router's IP results in Network is Unreachable.
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Jun 12, 2011
I am running CentOS 5.1 on VMware on Win 7 On CentOS I added Bridged network adapter and the server is connected to internet without any problems, but when I telnet any server on port 25 I get connection timeout.
Code:
telnet f.mx.mail.yahoo.com 25
Trying 98.137.54.237...
telnet: connect to address 98.137.54.237: Connection timed out
telnet: Unable to connect to remote host: Connection timed out
I stopped all servers, iptables and sendmail on the linux server and the firewalls on the win 7 but still getting the same error! I added new network adapter ( host-only ) and tried to telnet the win machine from vmware Linux but I got connection refused
Code:
telnet 192.168.71.1 25
Trying 192.168.71.1...
telnet: connect to address 192.168.71.1: Connection refused
telnet: Unable to connect to remote host: Connection refused
[code]....
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Nov 10, 2010
When i am trying to telnet to a machine connected in our LAN ..
telnet: Unable to connect to remote host: Connection refused
What's the reason for this? how do i establish a connection? I am using ubuntu 10.04.
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Feb 5, 2009
telnet localhost the output is...
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host: Connection refused
I don't understand what is the problem. Its not configured properly how do i configure it?
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Jan 22, 2011
I have an OpenVPN setup at work, and windows clients are able to connect fine. On my dual-boot system (Windows XP 64-bit and Ubuntu 10.10 64-bit) I'm able to connect on Windows but not Ubuntu. I use the same files for each. The network manager wasn't working, so I'm doing it via the command line right now:
Below is the output (sanitized)
Code:
Does this mean it's connected? If so, I'm not able to ping anything on the remote network, not even the OpenVPN server.
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Feb 11, 2009
I'm trying to connect with my server via telnet, but when i sent the command (telnet xxx.xxx.xxx.xxx Port) doesn't works and shows then follow error: Unable to connect to remote host: Connection refused, It happens with any port. Is strange but my telnet services works (telnet xxx.xxx.xxx.xxx), In addition, i tried with firewall enabled and disabled and the problem still happens. My centOS run on virtualbox.
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Aug 21, 2010
I'm using OpenVPN to connect to a remote system. When I run
Code:
It brings up a new tunnel interface. The problem is that once the tun interface is brought up and the VPN is established, my whole Internet connection slows to a crawl.
Here is the output from ip route show before openvpn:
Code:
And after openvpn:
Code:
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Dec 5, 2010
I have an openvpn bridge up and running (ubuntu to ubuntu, both in vmware fusion machines on macs). My problem is that I cannot get a connection faster than ~9mbps even though 20+mbps is available. I've been troubleshooting for a while and have tried many fixes. I just now did ethtool tap0 and I think maybe I found it. It says the link is 10mbps. I tried to change it with:
sudo ethtool -s tap0 speed 100
but it says ethtool cant change speed on tap0. How can i define the link speed of tap0?
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Jul 20, 2011
I have installed OpenVPN for network-manager using "sudo apt-get install network-manager-openvpn". Now I have it in my network-manager, but I dont know how to configure a connection, I have a configuration script, when I import that script in network-manager it automatically creates a connection, but still problems exists ...
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Apr 26, 2010
We use Openvpn for remote access to the office network. It would be nice to keep this running and automatically connect to the office at all times.Once started, it does this anyway. The problem lies when the user comes into the office. Openvpn connects as usual to the vpn gateway, but this causes weird routing loops.Is there a way to say to Openvpn "Always connect to the gateway unless you are on network 10.10.10.0/24" ?
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Jul 12, 2011
I am having problems setting up openvpn with networkmanager. I am running fedora15 with the newest networkmanager. Okay here is some info...
openvpn runs at boot time no problem...
Here is a copy of the boot time message from /var/log/messages
Code:
Here is a copy of tun0 from the ifconfig, and also you can see that openvpn is running from the command "netstat -ntl"
Code:
Here is the options i am using for server.conf for openvpn.
Code:
Okay well when i try to add openvpn to network manager i select the openvpn option and it ask for the required fields.
For gateway i am using -> 10.0.0.0
ALL other options i am just using the defaults...
Now i am not sure if they options that i am using is correct... if anyone has any input i would love to hear some.
Now when i try to start New VPN Connection from network manager it fails to connect and here is what i am getting from /var/log/messages
Code:
If you want to recommend command line options instead of using the network manager gui i am okay with that...
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Jan 21, 2011
I have Ubuntu 10.04 x86 installed, trying to get teamspeak 3 beta30.I have followed this guide: http://robert.penz.name/296/howto-in...u-10-04-lucid/
And can not get my network setup correctly to allow people to connect externally from my LAN. I have forwarded every relevant port I could find to the computer hosting TS, I forwarded them first as their respective protocols, and then as the combined UDP/TCP. I tried Forwarding single port numbers, and then port ranges.I have also tried uninstalling selinux.I have tried connecting directly to my cable modem with the server.I had this working perfectly three months ago with all the same software, using the same guide I listed above.The only thing I can imagine has changed is my operating system itself with system updates.
My network looks like:
Comcast cable modem--->Netgear WNR3500L Router----->Ubuntu 10.04 x86 desktop edition
what else I could possibly check? I can connect to and manage the TS server fine using localhost:9987 or 192.168.1.x:9987, it just wont allow any connections from outside the network.
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Jun 12, 2011
I installed fedora15, My openvpn didn't connect to my working computer.I checked openvpn configure more time, but still don't connect,
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Mar 2, 2010
i recently rent a VPS and installed with CENTOS 5 64bit, i followed a tutorial to install openVPN to bridge traffic to my windows machine.
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Apr 14, 2010
I have a network that consists of a few desktop machines, laptops, and two Internet connected linux servers. The Linux servers are the gateways, routers, and firewalls for my desktop and laptop machines.Whenever I'm away from home; I can connect to my home machines over the Internet by first ssh'ng (technically I use Webmin; because my firewall on each Linux servers blocks ssh from the Internet.) to one of the linux servers and then ssh'ng to the desired machine on my home network.
This works fine for my home linux machines. But not my Windows machines.I'd like to be able to rdp or rdesktop to my Windows machines.Will OpenVPN allow me to accomplish this ?
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Feb 15, 2010
I'm trying to connect OpenVPN server using shell command.
I've installed all needed packages (I guess)
if type
Code:
sudo openvpn client.ovpn
and i've got messages:
Code:
Mon Feb 15 12:29:25 2010 OpenVPN 2.1_rc19 i486-pc-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] built on Oct 13 2009
[Code]....
but i can't see tap0 interface and cannot ping any address at remote location.
I tried this config file at Windows OpenVPN client and all works fine.
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Jul 27, 2010
i have added a vpn connection on my Lucid desktop machine, but every time i try and connect, it fails. I also have the same, identical vpn connection on my karmic install on my laptop. everything works perfectly on Karmic, but Lucid is having problems. I have followed identical steps for creating the vpn connection on both machines: vpn connections can be made in 2 ways, the first is through the network manager, but trying to connect through the nm-applet returns an error about vpn failing to connect and "no valid vpn secrets".
I suspect this is at the root of the problem. The only way for my Lucid machine to successfully connect through the command line is if I run the openvpn command under sudo.
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Sep 28, 2010
I've been the las 4 days setting up my first VPN (OpenVPN bridged). The server is up and running OK but when I try to connect I've got this message in the client log.
Quote:
TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
TLS Error: TLS handshake failed
[Code].....
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Jun 23, 2010
My network is barely functional. I'm running 2 linux servers connected by openvpn (tun) through routers on both sides. There are Windows clients (98 and XP) on both subnets. One server (ls3) acting as PDC for the domain. The Windows clients use the respective linux boxes as gateways. On the server side (ls3 which is both openvpn server and samba server), all the clients can read/write properly to shares on both sides. The problems are all on the client side. Share connections to the server side disconnect after a few moments.
Browsing on the client side windows machines is fine. I can see shares on the server side. Some server side files open and are readable, writable, other server side files will not open. Some samba logon scripts on the server side can be opened from the client side. Others open after a long wait to a blank file! Permissions on server side files are set to 777 for testing. If a file won't open or reads "blank", that doesn't change no matter how many times you try. A non-readable/writable file overwritten by a readable/writable one can be read and written to!
I can ping successfully from any client on either side to any other client by either ip address or workstation name. Firewalls on both side are set to forward tcp and udp traffic going to port 1194 to the respective gateway linux boxes. Iptables on both linux gateways are down for testing. I tried reversing the openvpn server/client roles with the same result; the same physical side of the network had the problem. On one of the windows 98 clients, I wiped out the networking configuration completely and rebuilt it from scratch. Same result.
One one of the windows xp clients, I tried to rejoin the domain. It went through successfully but the result was the same as above. The network was operating smoothly for several years until the client side dsl modem broke last week. It was replaced with a newer model and at the same time I migrated from a pptp connection to openvpn. How to resolve this, Is this something to do with openvpn? Is this a network hardware problem? Am I missing something in the port forwarding on the routers? My smb.conf files are ancient except I added interface tun0. I have never seen 2 files sitting next to each other in the same directory where one opens and the other doesn't!
I'm running Mandrake 9.2 on the client side and Mandriva 2008 on the server side. I have a Sonicwall firewall on the server side, a Westell 7500 on the client side. I note that during the modem install, the http port was opened to the linux box on the client side and the access log got huge over the weekend and I ran out of disk space until I closed it down and deleted the log. I tried a simple test while viewing /var/log/daemons/errors on the client side. From a windows workstation in the client subnet, I opened a dos window and tried to print a file located on the samba server on the openvpn server machine which I knew NOT to be problematic.
The file printed and there were no errors reported in the log. I repeated the test with a known problematic file. The file would not print. The errors log noted:
Authenticate/Decrypt packet error: packet HMAC authentication failed
I regenerated the static.key file on the server side and scp'd it to the client side and restarted both openvpn's. I checked for duplicate files named static.key on both sides. Same error.
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Nov 19, 2010
I installed all the necessary packages for the networkmanager-openvpn function to function. The openvpn-connection-setting are successfully imported into the networkmanger via the conf file but the apply button is grayed out, so that actually saving and using the connection isn't possible? Does anyone know, where the problem is? It's a fresh install of Ubuntu 10.10 after the upgrade from 10.04 sent the networkmanger down the drain.
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