The CLI client works just fine, and it compiles from source, assuming you have all the XCode tools installed. macOS with Tunnelblickįor the macOS operating system, Tunnelblick is the premier OpenVPN GUI client. Like other more advanced configurations, this is out of scope for this article. Some instances, like Raspberry Pi are not set up to do this by default. Note: We assume your server can auto-create the tunX device. There is no remote line in the configuration file as shipped, so you’ll need to add one like: remote 192.168.1.75 The port is assumed to be udp/1194, though you’re more than welcome to change that. The first edit required is to add the proper remote line, telling our clients what server to connect to. As we move our VPN forward from a basic client-certificate authenticated VPN to using username/password and MFA, we’ll be editing this config just a little bit. The two client configurations contain the configuration, as well as almost all of the certificate components required to start your VPN client. The examples here don’t push any routes or perform any real network changes since the purpose is to demonstrate MFA. For Windows, the built-in OpenVPN GUI is enough. Client Componentsįor the macOS client, we are using Tunnelblick for the GUI client. I don’t mean to leave out novice users here, but the intent of this article is MFA, not generic OpenVPN setup and startup. If you don’t see any errors, your server process is running. # echo ‘openvpn_enable=”YES”’ > /etc/rc.conf Once that’s done, you need to enable the openvpn daemon on the box: # fetch # unzip mfa_example.zip # cd mfa_example # mkdir /usr/local/etc/openvpn & cp server.* dh2048.pem ca.crt *.sh /usr/local/etc/openvpn/ # pkg install vim oath-toolkit curl p圓7-urllib3 openvpnĭownload the sample configuration files, extract them, and put the server files in place. Once ready, I installed the openvpn and oath-toolkit packages (along with vim, to make my life easier). It takes about 5 minutes for the machine to be available. Next, I selected “Cloud Compute”, Chicago (it’s closest to me), FreeBSD 12.1, $5/mo ($.007/h), and then “Deploy Now” at the bottom. I created an account on Vultr, clicked on Products, clicked on the little blue plus (+) button in the upper right corner to create a new server. Virtual Private Servers (VPSs) make this cheap and easy to do, though. Note: It’s not necessary to host a server external to your local network. You are welcome to use my referral link or visit the site directly. You can set up a virtual server in just a few minutes for less than a penny an hour. Those will pull in any dependencies necessary.įor my examples, I used a virtual server hosted by Vultr. Installing the OpenVPN and oath-toolkit packages from the FreeBSD ports tree or package repository should be all you need. The example files expect a FreeBSD or Linux system my examples use FreeBSD on the server. Oath Secret Generator oath-secret-gen.sh.Oauth-tool MFA Verification Script oath.sh.Windows Client Configuration File windows-MFA.ovpn.macOS Client Configuration File macOS-MFA.ovpn.Certificate Authority Certificate ca.crt.For this demonstration, the important parts are going to be the MFA challenge response mechanisms.įor this demonstration, you can download the sample configuration zip file.
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