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OpenVPN
FreePBX OpenVPN: http://wiki.freepbx.org/display/FPG/System+Admin+-+VPN+Server
OpenVPN is an SSL-based VPN technology that can run on both Linux and Windows systems.
TUN = Routed Server TAP = Bridged Server
Testing Connections
ifconfig route -n ping <hostname> ping <host IP> cat /etc/resolv.conf
Client
Routing
You may find that the VPN connection pushes a new Default Route. This can wreak havoc on your VPN workstation networking behavior.
You can get around this problem by adding a route on the IPv4 tab when editing the NetworkManager VPN connection. Try adding a route something like:
| Setting Name | Setting Data | Description |
| address | 10.0.0.0 | Network subnet behind VPN server |
| netmask | 255.0.0.0 | Netmask of subnet behind VPN server |
| gateway | 10.0.0.1 | Remote OpenVPN server's private IP address |
| metric | 1000 | Won't matter much unless thereare multiple routes to same subnet |
| Ignore automatically obtained routes | Selected (Checked) | Ignore routes pushed from VPN server |
| Use this connection only for resources on this network | Selected (Checked) | Use your local Internet connection for off-VPN resources |
Fedora 16
Installation
Verify these packages are installed (probably by default):
sudo yum install openvpn NetworkManager-openvpn
Command Line
cd Dropbox/VPN/MER/ sudo openvpn filename.ovpn
NetworkManager GUI
Using NetworkManager for VPN connections is easy for users to manage and doesn't require root or sudo permissions.
If a .ovpn file is provided, use it for clues to configure the NetworkManager VPN connection.
Click NetworkManager icon → Network Settings
Click + (Plus Symbol) → VPN → Create → OpenVPN
- Name of Connection
- Remote VPN Server (Gateway)
- Certificates (TLS)
- Browse to certificate (.p12 file) assigned by OpenVPN admin
- You might store your VPN configuration files and certs in a Dropbox folder
- Password assigned by OpenVPN admin
- Advanced
- General Tab
- Use LZO Compression
- Use Custom MTU - 1400
- Security Tab
- Cipher - BF-CBC
