Would you like to learn how to solve the OpenVPN problem related to the error 0A00018E? This tutorial will show you how to solve the error message “CA MD TOO WEAK”.

• Ubuntu 18
• Ubuntu 19
• Ubuntu 20
• Ubuntu 22

Equipment list

Here you can find the list of equipment used to create this tutorial.

This link will also show the software list used to create this tutorial.

Tutorial Openvpn – ERROR:0A00018E:SSL ROUTINES::CA MD TOO WEAK

Here is the OpenVPN error message.

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Edit the OpenVPN configuration file.

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Add the following at the end of the file.

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Here is my VPN configuration file.

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Connect to the OpenVPN server.

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Congratulations! You are able to connect to the VPN using OpenVPN.