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How To Fix Global Protect VPN SSL Handshake Failed Error on Ubuntu 22.04

Ubuntu 16

In this article, we will explore how to fix the Global Protect VPN SSL Handshake Failed error on Ubuntu 22.04. This error can be a stumbling block when trying to connect to a VPN, but there are a few potential solutions that can help you resolve it.

Quick Answer

To fix the Global Protect VPN SSL Handshake Failed error on Ubuntu 22.04, you can try modifying the OpenSSL configuration file by adding the line "Options = UnsafeLegacyRenegotiation" in the [system_default_sect] section. Another option is to use an alternative client like globalprotect-openconnect. If these solutions don’t work, it may be best to contact your institution’s IT support for further assistance.

Understanding the SSL Handshake Failed Error

The SSL Handshake Failed error typically occurs when there is a failure in the SSL/TLS handshake process. This process is crucial for establishing a secure connection between two systems. A failure in this process can prevent a successful connection to the Global Protect VPN.

Solution 1: Modify OpenSSL Configuration

One of the potential solutions to this problem is to modify the OpenSSL configuration file. OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.

To modify the OpenSSL configuration file, you need to open the file located at /usr/lib/ssl/openssl.cnf. You can do this by using the nano command like so:

sudo nano /usr/lib/ssl/openssl.cnf

Once you have the file open, locate the [system_default_sect] section and add the following line:

Options = UnsafeLegacyRenegotiation

This line enables the legacy renegotiation process, which can help bypass the SSL handshake failure. Please note that this workaround has been reported to work for GlobalProtect versions 6.0.1-6 and 6.0.4-28, as well as version 5.3.

Solution 2: Use an Alternative Client

If modifying the OpenSSL configuration does not solve the problem, you might want to consider using an alternative client. One such client is globalprotect-openconnect.

To install globalprotect-openconnect, you need to add the ppa:yuezk/globalprotect-openconnect repository and then install the client. You can do this by running the following commands:

sudo add-apt-repository ppa:yuezk/globalprotect-openconnect
sudo apt-get update
sudo apt install globalprotect-openconnect

The add-apt-repository command adds the specified PPA (Personal Package Archive) to your system’s software sources, allowing you to install software provided by the PPA. The apt-get update command then updates your system’s package list, and the apt install command installs the globalprotect-openconnect client.

Please note that while this client can be a viable alternative, it may not work for everyone. Some users have reported connection issues despite successful authentication.


The SSL handshake failure can be a frustrating error to encounter when trying to connect to Global Protect VPN on Ubuntu 22.04. However, by modifying the OpenSSL configuration or using an alternative client, you can potentially resolve this issue.

If these solutions do not work, it may be due to a bug in the specific version of Global Protect provided by your institution. In such cases, reaching out to your institution’s IT support team for assistance may be the best course of action.

Remember to always be cautious when modifying system files or installing alternative software, and ensure that you understand the changes you are making. If in doubt, seek assistance from a knowledgeable source.

What is Global Protect VPN?

Global Protect VPN is a virtual private network (VPN) solution provided by Palo Alto Networks. It allows users to securely connect to their organization’s network from remote locations, ensuring the privacy and security of their data transmission.

How does the SSL handshake process work?

The SSL handshake process is a series of steps that occur when establishing a secure connection between a client and a server. It involves exchanging cryptographic keys, verifying the authenticity of the server, and negotiating the encryption algorithms and parameters to be used for the secure communication.

Why does the SSL handshake failed error occur?

The SSL handshake failed error can occur due to various reasons, such as incompatible SSL/TLS versions, incorrect server configurations, certificate issues, or network connectivity problems. It indicates a failure in the initial stage of establishing a secure connection between the client and server.

Can modifying the OpenSSL configuration file cause any other issues?

Modifying the OpenSSL configuration file should be done with caution, as it can potentially cause issues with other applications or services that rely on OpenSSL. It is recommended to back up the original file before making any changes and to thoroughly test the modified configuration to ensure compatibility and functionality.

Are there any risks involved in using an alternative client like globalprotect-openconnect?

While using an alternative client like globalprotect-openconnect can be a viable solution, it is important to note that it may not work for everyone and could have compatibility issues with certain Global Protect VPN configurations. Additionally, alternative clients may not receive the same level of support or updates as the official client, potentially posing security risks. It is advisable to thoroughly research and test any alternative client before using it in a production environment.

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