WSL2 Docker Container can't connect to Host over Gateway IP

[5andr0]

Description

On my Linux Host docker containers I'm using following network settings to be able to connect to the host via the gateway IP 172.29.6.254:

networks:
  default:
    ipam:
      driver: default
      config:
        - subnet: 172.29.0.0/16
          ip_range: 172.29.6.0/24
          gateway: 172.29.6.254

I wanted to do the same on my windows host with docker desktop (wsl2). I can ping the gateway, but connections are refused.
I thought it might end up in the wsl2 instance, but I opened a port with nc inside wsl2 and also can't connect to that.
I can connect to the windows host by host.docker.internal, but I want to have a fixed IP address and not resolve the hostname.

Network inspect looks exactly the same like on my linux host:

docker network inspect dummy_default
[
    {
        "Name": "dummy_default",
        "Id": "a6fc9cc43abd262be542cea1bd1fef9f271a091bf32248e319664af96525ca4b",
        "Created": "2024-09-23T07:02:16.96548837Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "172.29.0.0/16",
                    "IPRange": "172.29.6.0/24",
                    "Gateway": "172.29.6.254"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "c69c0a57820d01116f2db8c4bf4870bce2b1d63743f93c3a6dd9e524f16faccd": {
                "Name": "bash",
                "EndpointID": "3694c8e65009e1560043a4d92f8809bb3e693eb5fcd8001c4ae7e802214406ad",
                "MacAddress": "02:42:ac:1d:06:00",
                "IPv4Address": "172.29.6.0/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {
            "com.docker.compose.network": "default",
            "com.docker.compose.project": "dummy",
            "com.docker.compose.version": "2.29.1"
        }
    }
]

Reproduce

services:
  openvpn:
    container_name: bash
    image: bash
    restart: always
    privileged: true
    stdin_open: true

networks:
  default:
    ipam:
      driver: default
      config:
        - subnet: 172.29.0.0/16
          ip_range: 172.29.6.0/24
          gateway: 172.29.6.254

Make a dummy container, try to connect to an app on host (listening on 0.0.0.0) from inside the container via IP 172.29.6.254. This works on linux host and also works on windows host when using hostname host.docker.internal instead of the IP.

Expected behavior

Like on linux host being able to connect to host apps on gateway ip (172.29.6.254 in this case)

docker version

Client:
 Version:           27.1.1
 API version:       1.46
 Go version:        go1.21.12
 Git commit:        6312585
 Built:             Tue Jul 23 19:57:57 2024
 OS/Arch:           windows/amd64
 Context:           desktop-linux

Server: Docker Desktop 4.33.1 (161083)
 Engine:
  Version:          27.1.1
  API version:      1.46 (minimum version 1.24)
  Go version:       go1.21.12
  Git commit:       cc13f95
  Built:            Tue Jul 23 19:57:19 2024
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.7.19
  GitCommit:        2bf793ef6dc9a18e00cb12efb64355c2c9d5eb41
 runc:
  Version:          1.7.19
  GitCommit:        v1.1.13-0-g58aa920
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

docker info

Client:
 Version:    27.1.1
 Context:    desktop-linux
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.16.1-desktop.1
    Path:     C:\Program Files\Docker\cli-plugins\docker-buildx.exe
  compose: Docker Compose (Docker Inc.)
    Version:  v2.29.1-desktop.1
    Path:     C:\Program Files\Docker\cli-plugins\docker-compose.exe
  debug: Get a shell into any image or container (Docker Inc.)
    Version:  0.0.34
    Path:     C:\Program Files\Docker\cli-plugins\docker-debug.exe
  desktop: Docker Desktop commands (Alpha) (Docker Inc.)
    Version:  v0.0.14
    Path:     C:\Program Files\Docker\cli-plugins\docker-desktop.exe
  dev: Docker Dev Environments (Docker Inc.)
    Version:  v0.1.2
    Path:     C:\Program Files\Docker\cli-plugins\docker-dev.exe
  extension: Manages Docker extensions (Docker Inc.)
    Version:  v0.2.25
    Path:     C:\Program Files\Docker\cli-plugins\docker-extension.exe
  feedback: Provide feedback, right in your terminal! (Docker Inc.)
    Version:  v1.0.5
    Path:     C:\Program Files\Docker\cli-plugins\docker-feedback.exe
  init: Creates Docker-related starter files for your project (Docker Inc.)
    Version:  v1.3.0
    Path:     C:\Program Files\Docker\cli-plugins\docker-init.exe
  sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
    Version:  0.6.0
    Path:     C:\Program Files\Docker\cli-plugins\docker-sbom.exe
  scout: Docker Scout (Docker Inc.)
    Version:  v1.11.0
    Path:     C:\Program Files\Docker\cli-plugins\docker-scout.exe

Server:
 Containers: 2
  Running: 2
  Paused: 0
  Stopped: 0
 Images: 2
 Server Version: 27.1.1
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 2bf793ef6dc9a18e00cb12efb64355c2c9d5eb41
 runc version: v1.1.13-0-g58aa920
 init version: de40ad0
 Security Options:
  seccomp
   Profile: unconfined
 Kernel Version: 5.15.153.1-microsoft-standard-WSL2
 Operating System: Docker Desktop
 OSType: linux
 Architecture: x86_64
 CPUs: 24
 Total Memory: 31.3GiB
 Name: docker-desktop
 ID: e70b350d-247a-49f3-b306-ab7a669f1ee5
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 HTTP Proxy: http.docker.internal:3128
 HTTPS Proxy: http.docker.internal:3128
 No Proxy: hubproxy.docker.internal
 Labels:
  com.docker.desktop.address=npipe://\\.\pipe\docker_cli
 Experimental: false
 Insecure Registries:
  hubproxy.docker.internal:5555
  127.0.0.0/8
 Live Restore Enabled: false

WARNING: No blkio throttle.read_bps_device support
WARNING: No blkio throttle.write_bps_device support
WARNING: No blkio throttle.read_iops_device support
WARNING: No blkio throttle.write_iops_device support
WARNING: daemon is not using the default seccomp profile

Diagnostics ID

C2CBF451-1B6A-45F6-8843-970D1C631DFD/20240923075126

Additional Info

No response