# Cilium 1.20: Gateway API ExternalAuth, TCPRoute/UDPRoute, ENI IPAM for IPv6, and more

DevFeed: [Cilium 1.20: Gateway API ExternalAuth, TCPRoute/UDPRoute, ENI IPAM for IPv6, and more](<https://devfeed.tech/articles/cilium-1-20-gateway-api-externalauth-tcproute-udproute-eni-ipam-for-ipv6-and-more-17374.md>)

Original publisher: [Read original article](<https://www.cncf.io/blog/2026/09/14/cilium-1-20-gateway-api-externalauth-tcproute-udproute-eni-ipam-for-ipv6-and-more/>)

Author: Nico Vibert and Donia Chaiehloudj, Cilium

Published: 2026-09-14T10:45:49Z

Content type: article

Language: en

Sources: [Cloud Native Computing Foundation](<https://devfeed.tech/sources/cloud-native-computing-foundation.md>)

Topics: [Cilium](<https://devfeed.tech/topics/cilium.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [API](<https://devfeed.tech/topics/api.md>), [networking](<https://devfeed.tech/topics/networking.md>), [Kubernetes](<https://devfeed.tech/topics/kubernetes.md>), [Amazon Web Services](<https://devfeed.tech/topics/aws.md>), [eBPF](<https://devfeed.tech/topics/ebpf.md>), [VPC](<https://devfeed.tech/topics/vpc.md>), [nginx](<https://devfeed.tech/topics/nginx.md>)

Tags: [2026](<https://devfeed.tech/tags/2026.md>), [api](<https://devfeed.tech/tags/api.md>), [authentication](<https://devfeed.tech/tags/authentication.md>), [authorization](<https://devfeed.tech/tags/authorization.md>), [aws](<https://devfeed.tech/tags/aws.md>), [blog](<https://devfeed.tech/tags/blog.md>), [cilium](<https://devfeed.tech/tags/cilium.md>), [cloud](<https://devfeed.tech/tags/cloud.md>), [cni](<https://devfeed.tech/tags/cni.md>), [ebpf](<https://devfeed.tech/tags/ebpf.md>), [google](<https://devfeed.tech/tags/google.md>), [ingress-nginx](<https://devfeed.tech/tags/ingress-nginx.md>), [ipv4](<https://devfeed.tech/tags/ipv4.md>), [ipv6](<https://devfeed.tech/tags/ipv6.md>), [kubernetes](<https://devfeed.tech/tags/kubernetes.md>), [microsoft](<https://devfeed.tech/tags/microsoft.md>), [network](<https://devfeed.tech/tags/network.md>), [networking](<https://devfeed.tech/tags/networking.md>), [nginx](<https://devfeed.tech/tags/nginx.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [release](<https://devfeed.tech/tags/release.md>)

## AI overview

Cilium 1.20 expands Gateway API support with ExternalAuth, CORS filters, ListenerSets, TCPRoute, and UDPRoute. The release also introduces extensible datapath plugins, advances networking standardization with Kubernetes, and adds beta IPv6 support for AWS ENI IPAM.

## Source excerpt

Cilium 1.20, the second major open source Cilium release of 2026 after Cilium 1.19, is finally here. Three themes stand out in this release: Thank you to every contributor, reviewer and maintainer who made Cilium 1.20...