TLSOptions in Godot – Complete Guide

Welcome to our comprehensive tutorial on TLSOptions in Godot 4, where we break down the essentials of Transport Layer Security (TLS) and its implementation in one of the most exciting game engines available today. Understanding the intricacies of secure network communication is invaluable, especially in an age where data breaches are a growing concern. Whether you’re an indie game developer, hobbyist, or curious learner, mastering TLSOptions in Godot 4 will arm you with the knowledge to protect your game’s network traffic and provide your players with a safe gaming environment.

What is TLSOptions?

TLSOptions is a Godot 4 class designed to provide TLS configuration for networking in games. These configurations are crucial for secure communication between clients and servers, ensuring that any data transferred remains private and integral.

What is it for?

TLSOptions serves as the backbone for enabling secure network connections in your Godot 4 projects. Whether you are setting up a multiplayer game or any other feature that requires networking, TLSOptions help in securing these connections. It abstracts the complexity of TLS setup, making it more accessible for game developers who may not be network security experts.

Why should I learn it?

In the modern digital age, security is not just a bonus; it’s a necessity. Learning to configure TLSOptions gives you the power to create secure and trustworthy multiplayer experiences. By following the best practices of network security with TLSOptions, you can protect your users from potential threats, which is essential for maintaining their confidence and safeguarding your reputation as a developer.

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Setting Up TLSOptions in Godot 4

To start using TLSOptions in your Godot 4 project, the first step is to create a new instance of the TLSOptions class. Here’s how you can do this:

var tls_options =

Once you have your `TLSOptions` instance, you can begin configuring its properties. For instance, setting the `private_key` property with a key you own:

tls_options.private_key = load("res://path/to/your/private_key.key")

After setting the private key, the next step is to set the corresponding certificate to use with the key:

tls_options.certificate = load("res://path/to/your/certificate.crt")

Your game might also need to validate the server’s certificate against a set of trusted Certificate Authorities (CA):

tls_options.cacert = load("res://path/to/your/ca_certificates.pem")

Using TLSOptions for a Secure Server

When configuring a secure server in Godot, you need to apply the TLSOptions to the server. Here’s an example of setting up a secure server:

var server =
server.use_tls(tls_options, true)

Remember to start the server and listen for connections. This can be done as follows:


After starting your server, you’ll want to manage the incoming connections securely. Here’s an example of how to accept a secure connection:

if server.is_connection_available():
    var peer = server.take_connection()
    # Use the connected peer to send and receive data securely

Using TLSOptions for a Secure Client

On the client side, you should similarly configure `TLSOptions` for the connection:

var client =
client.use_tls(tls_options, false)

It’s important to connect to the server with the secure connection:

client.connect_to_host(server_ip, port_number)

Once connected, you can use the client to send and receive data in a secure manner. Here’s a pattern for safely sending data:

if client.get_status() == StreamPeerTCP.STATUS_CONNECTED:

To receive data, ensure you check you are still connected, and then call the appropriate receive method:

if client.get_status() == StreamPeerTCP.STATUS_CONNECTED:
    var received_data = client.get_data()
    # Process the received data as needed

By following these examples, you’ve taken critical steps toward adding secure communication to your Godot 4 game. In the next part of our tutorial, we’ll delve into further examples that help troubleshoot common issues and ensure a robust setup for your networking needs. Stay tuned!Ensuring that your TLSOptions are correctly set up is paramount to maintaining secure connections. Let’s explore additional configurations and troubleshooting methods to optimize your network security in Godot 4.

When configuring TLSOptions, you might need to allow a self-signed certificate for testing purposes. While this isn’t recommended for production, it can be useful during development:

tls_options.allow_self_signed = true

In some cases, you might want to enforce the verification of the client’s certificate on the server side. You can enable this feature like so:

tls_options.verify_peer = true

To handle common errors that may arise during the handshake process between the client and the server, it’s essential to implement error-checking mechanisms. Here’s an example of handling errors after attempting to connect:

if client.get_status() == StreamPeerTCP.STATUS_ERROR:
    print("Failed to establish a secure connection: ", client.get_error())

In addition to initiating secure communication, it’s also important to ensure that the data transmission is carried out safely. Encrypting data before sending and decrypting after receiving is crucial, especially with sensitive information. With Godot 4’s high-level networking, you can leverage `PacketPeerStream` wrapped around the `StreamPeerTCP` using TLS. Here’s how to set this up:

var packet_peer =
packet_peer.stream_peer = client

After configuring the PacketPeerStream, you can easily send and receive packets securely:

# Sending encrypted data:

# Receiving encrypted data:
if packet_peer.get_available_packet_count() > 0:
    var received_packet = packet_peer.get_packet()
    # Process the received packet

It’s also important to regularly check for disconnections. Here’s how to monitor the status of the connection and act accordingly:

if client.get_status() == StreamPeerTCP.STATUS_NONE:
    print("The connection is lost or was never established.")

Remember that proper error handling and connection monitoring are essential to provide smooth gameplay experiences over a network in Godot 4. As a developer, continually test and verify your configurations to ensure the highest level of security and performance.

With these additional code examples and tips for troubleshooting, you should have a deeper understanding of how to implement TLSOptions for creating secure network connections in Godot 4. As you continue to develop your projects, keep security at the forefront of your network architecture and feature implementations. If you found this tutorial helpful, keep an eye out for our next deep dives into other critical aspects of game development and secure networking with Zenva. We’re committed to empowering you with the knowledge to create safe and engaging multiplayer games!In our ongoing journey to create secure game environments with Godot 4, let’s explore more complex scenarios and configurations using TLSOptions. This will not only enhance our understanding but also equip us with practical solutions that can be directly applied to a variety of game development situations.

To add another layer of security, let’s talk about hostname verification. When a client connects to your server, it’s crucial to ensure it’s connecting to the intended domain. Here’s how you activate hostname verification in your TLS configuration:

tls_options.verify_host = true
tls_options.hostname = ""

Debugging secure connections can be a bit tricky. Yet, Godot provides verbose logs that can help. Enable verbose logging with the following:

tls_options.verbose = true

This simple flag can reveal a wealth of information about the steps being taken during the handshake and connection process.

When dealing with TLS, it isn’t uncommon to encounter compatibility issues, especially with older servers or clients. If necessary, Godot 4 allows you to set compatibility modes to ensure broader support. Here’s an example:

tls_options.no_tlsv1 = true  // Disables TLSv1 for security reasons
tls_options.no_tlsv1_1 = true // Disables TLSv1.1 for security reasons

These settings help in disabling outdated and less secure versions of the protocol, ensuring only the more secure versions are used.

StreamPeerTCP with TLSOptions can be wrapped within a higher-level networking class like WebSocketClient for custom secure WebSocket connections. Consider the following example for setting up a secure WebSocket client:

var ws_client =
ws_client.stream_peer = client

Once this configuration is complete, you can connect to the WebSocket server securely. And with this, you would send and receive WebSocket messages securely:


Networking is an asynchronous affair; responding to signals can help you manage connection lifecycle events more effectively. For instance, to handle a TLS handshake completion in Godot, connect to the appropriate signal:

client.connect("connection_established", self, "_on_tls_handshake_completed")

For the callback handling the signal, you might implement it like this:

func _on_tls_handshake_completed(protocol):
    print("Secure connection established using ", protocol)

Lastly, remember that working with TLSOptions also means dealing with sensitive cryptographic material. Always ensure that your keys and certificates are stored securely and not hard-coded into your game’s script files. Use Godot’s resource system or external configuration files for production deployment:

var key_resource = preload("res://path/to/securely_stored_key.key")
var cert_resource = preload("res://path/to/securely_stored_certificate.crt")
tls_options.private_key = key_resource
tls_options.certificate = cert_resource

Through these additional code examples, we’ve seen how to fine-tune our Godot 4 network security settings, handle specific TLS use-cases and lifecycle events, and guard against common security pitfalls. Always approach network programming with security as a priority, and ensure you’re up-to-date with best practices and potentially required protocol updates.

By adhering to these standards and leveraging the power of TLSOptions, you will significantly improve the security of your multiplayer games. We hope you have found these insights beneficial and inspiring, as we at Zenva pride ourselves in providing top-notch educational content in coding and game development. Remember, security is paramount, and by incorporating these practices into your games, you are setting a strong foundation for a safe and enjoyable gaming experience.

Continuing Your Game Development Journey

Embarking on the journey of mastering game development is an exciting adventure, with each new skill opening doors to more creative possibilities. After diving into the world of secure network communication with TLSOptions in Godot 4, you might be wondering about the next steps to take.

Whether you’ve just started or you’re expanding your skills, the Godot Game Development Mini-Degree from Zenva Academy offers a structured path to up your game development game. This comprehensive suite of courses delves into using both 2D and 3D assets, programming with GDScript, and implementing various game mechanics and UI systems. It’s a treasure trove of knowledge suitable for all, from beginners to seasoned developers, eager to enhance their craft in a flexible, project-based learning environment.

For those looking to broaden their expertise even further, be sure to check out our full collection of Godot courses. Here, you can find a myriad of topics that will help reinforce what you’ve learned and guide you to master new areas in game development. With over 250 supported courses, Zenva Academy is dedicated to helping you turn your passion for gaming into a tangible set of skills. Start your game development journey with us and step confidently into the growing games market, armed with the capabilities to bring your visions to life.


As we wrap up our exploration of TLSOptions in Godot 4, it’s clear that the power of secure networking is at our fingertips. By embracing these tools, you’re not only enhancing the safety and trustworthiness of your games but also setting a professional standard in your development practices. The world of game development is infinitely vast, and with each new skill you acquire, you unlock more of its potential. Remember, every step you take on this path not only sharpens your technical prowess but also shapes the experiences of players around the world.

Whether you’re ready to take your next step in game development or looking to solidify your foundational knowledge, the Godot Game Development Mini-Degree at Zenva Academy is your gateway to success. Join us on this journey, and let’s continue to create, innovate, and thrive together in the exciting world of game development. Are you ready to level up your skills?

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