Kong Gateway 3.4 for Open Source (OSS) introduces significant features, notably the support for WebAssembly (Wasm) as a beta feature, allowing users to write Wasm filters in Rust and Go without external dependencies. This update enhances the extensibility and customization of Kong Gateway by enabling developers to use their preferred programming languages, with plans to expand language support in the future. Additionally, the release includes support for TCP/UDP-based firewall rules in the IP Restriction plugin, complementing existing protocol restrictions and offering an efficient method to block or allow IPs or CIDR spaces at a lower protocol level. The Wasm module is disabled by default, ensuring no additional memory usage unless activated, and users are encouraged to provide feedback on the new features, with reference documentation available on the repository during the beta phase.