Difference between revisions of "VPN Access"
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where itp.ovpn is the name of the config file. openvpn need root access, therefor you must enter your local password for sudo. After this you have to enter your ITP credentials (Username and Password). | where itp.ovpn is the name of the config file. openvpn need root access, therefor you must enter your local password for sudo. After this you have to enter your ITP credentials (Username and Password). | ||
+ | |||
+ | If everything went fine the output will look like: | ||
+ | |||
+ | <pre> | ||
+ | Fri Dec 7 15:03:00 2012 WARNING: Make sure you understand the semantics of --tls-remote before using it (see the man page). | ||
+ | Fri Dec 7 15:03:00 2012 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables | ||
+ | Fri Dec 7 15:03:00 2012 UDPv4 link local: [undef] | ||
+ | Fri Dec 7 15:03:00 2012 UDPv4 link remote: [AF_INET]141.2.246.2:1194 | ||
+ | Fri Dec 7 15:03:00 2012 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this | ||
+ | Fri Dec 7 15:03:00 2012 [FIAS-ITP_Generic_VPN_Service] Peer Connection Initiated with [AF_INET]141.2.246.2:1194 | ||
+ | Fri Dec 7 15:03:02 2012 TUN/TAP device tap0 opened | ||
+ | Fri Dec 7 15:03:02 2012 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0 | ||
+ | Fri Dec 7 15:03:02 2012 /sbin/ifconfig tap0 10.63.131.1 netmask 255.255.0.0 mtu 1500 broadcast 10.63.255.255 | ||
+ | Fri Dec 7 15:03:02 2012 Initialization Sequence Completed | ||
+ | </pre> | ||
+ | |||
+ | Termiate the session by pressing Ctrl-C in this terminal. |
Revision as of 14:04, 7 December 2012
To get full access to our network from external locations we provide a VPN access based on openvpn. This is free software and part of every Linux distribution. The following guide has been tested with Ubuntu 12.04 and 12.10. It is available for Windows and MacOS too.
Install OpenVPN
It is not part of the default installation, but can easily installed using apt. Enter the following commands:
sudo apt-get install openvpn
The requieres to enter your password to get super user previleges.
Command line configuration
This is fast and easy but requieres to enter commands. Create or download [1] the config file and store it anywhere you like:
# ITP OpenVPN configuration. client dev tap proto udp nobind remote vpn.th.physik.uni-frankfurt.de tls-remote /CN=FIAS-ITP_Generic_VPN_Service remote-cert-tls server resolv-retry infinite auth-user-pass # Adapt this to the path of our CA certificate file. ca localca.full.pem # Comment out the following line to only route ITP connections over the VPN. redirect-gateway def1
Download our CA (Certificate of Authority) [2] and store it in the same place. This file is needed for verifcation the authenticity of the server.
Start the VPN connection
Open a terminal and change to the path where the vpn config file is stored. Start the connection with
sudo openvpn itp.ovpn
where itp.ovpn is the name of the config file. openvpn need root access, therefor you must enter your local password for sudo. After this you have to enter your ITP credentials (Username and Password).
If everything went fine the output will look like:
Fri Dec 7 15:03:00 2012 WARNING: Make sure you understand the semantics of --tls-remote before using it (see the man page). Fri Dec 7 15:03:00 2012 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables Fri Dec 7 15:03:00 2012 UDPv4 link local: [undef] Fri Dec 7 15:03:00 2012 UDPv4 link remote: [AF_INET]141.2.246.2:1194 Fri Dec 7 15:03:00 2012 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this Fri Dec 7 15:03:00 2012 [FIAS-ITP_Generic_VPN_Service] Peer Connection Initiated with [AF_INET]141.2.246.2:1194 Fri Dec 7 15:03:02 2012 TUN/TAP device tap0 opened Fri Dec 7 15:03:02 2012 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0 Fri Dec 7 15:03:02 2012 /sbin/ifconfig tap0 10.63.131.1 netmask 255.255.0.0 mtu 1500 broadcast 10.63.255.255 Fri Dec 7 15:03:02 2012 Initialization Sequence Completed
Termiate the session by pressing Ctrl-C in this terminal.