Can't resolve container features from ghcr.io

I cannot install features in my dev containers if they're from ghcr.io. I have no problem installing locally created features, but it always fails with an an ENOTFOUND error when trying resolve ghcr.io. I should note that I'm behind a corporate proxy. Seems to work fine at home, but I don't know what needs to be set for the feature not to fail.

• VSCode Version: 1.81.1

• Local OS Version: Windows 10

• Remote OS Version: Ubuntu

• Remote Extension/Connection Type: Containers

• Logs:

[2238736 ms] --- Processing User Features ----
[2238737 ms] [* user-provided] ghcr.io/devcontainers/features/docker-outside-of-docker:1.3.0
[2238737 ms] Resolving Feature dependencies for 'ghcr.io/devcontainers/features/docker-outside-of-docker:1.3.0'...
[2238738 ms] * Processing feature: ghcr.io/devcontainers/features/docker-outside-of-docker:1.3.0
[2238738 ms] > input: ghcr.io/devcontainers/features/docker-outside-of-docker:1.3.0
[2238739 ms] >
[2238739 ms] > resource: ghcr.io/devcontainers/features/docker-outside-of-docker
[2238739 ms] > id: docker-outside-of-docker
[2238739 ms] > owner: devcontainers
[2238739 ms] > namespace: devcontainers/features
[2238739 ms] > registry: ghcr.io
[2238739 ms] > path: devcontainers/features/docker-outside-of-docker
[2238739 ms] >
[2238739 ms] > version: 1.3.0
[2238739 ms] > tag?: 1.3.0
[2238739 ms] > digest?: undefined
[2238739 ms] manifest url: https://ghcr.io/v2/devcontainers/features/docker-outside-of-docker/manifests/1.3.0
[2238766 ms] Error: getaddrinfo ENOTFOUND ghcr.io
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:109:26)

devcontainer.json

{
    "name": "UbuntuCert",
    "build": {
        "dockerfile": "Dockerfile"
    },

    "runArgs": ["--init"],

    "containerEnv": {
        "NODE_EXTRA_CA_CERTS": "/etc/ssl/certs/ca-certificates.crt"
    },

    "features": {
        "ghcr.io/devcontainers/features/docker-outside-of-docker:1.3.0": {}
    },

    "customizations": {
        "vscode": {
            "extensions": [
				"ms-azuretools.vscode-docker",
				"GitHub.vscode-pull-request-github"
			]
        }
    }
}