WSL 2 mirrored networking breaks NFS mounts (“Connection timed out”)

### Windows Version

Microsoft Windows [Version 10.0.26100.2894]

### WSL Version

WSL version: 2.3.26.0 Kernel version: 5.15.167.4-1 WSLg version: 1.0.65 MSRDC version: 1.2.5620 Direct3D version: 1.611.1-81528511 DXCore version: 10.0.26100.1-240331-1435.ge-release Windows version: 10.0.26100.2894

### Are you using WSL 1 or WSL 2?

- [x] WSL 2
- [ ] WSL 1

### Kernel Version

5.15.167.4-microsoft-standard-WSL2

### Distro Version

Ubuntu 22.04.5 LTS

### Other Software

When using WSL 2 mirrored networking mode, any attempt to mount an NFS share from within WSL 2 fails with errors:
```
$ sudo mount -v -t nfs ub-nuc:/home/wpwoodjr /home/wpwoodjr/ub-nuc
mount.nfs: timeout set for Mon Jan 27 13:45:44 2025
mount.nfs: trying text-based options 'vers=4.2,addr=192.168.86.200,clientaddr=192.168.86.41'
mount.nfs: mount(2): Invalid argument
mount.nfs: trying text-based options 'vers=4,minorversion=1,addr=192.168.86.200,clientaddr=192.168.86.41'
mount.nfs: mount(2): Connection timed out
mount.nfs: Connection timed out
```
**Key Observations**
- Mount works from other Linux clients on the same network (e.g., a Raspberry Pi).
- Mount works if I revert WSL 2 to the legacy NAT networking mode.
- Turning off Windows Firewall does not help.
- Pinging or otherwise accessing the NFS server (e.g. rpcinfo -p serverIP) still works, but mount -t nfs … fails.

**Request**
- Fix or provide guidance on how to use mirrored networking with protocols like NFS that may rely on particular port/protocol interactions.
- Alternatively, document known limitations of mirrored networking mode for advanced protocols.

Thank you for looking into this issue!

### Repro Steps

Enable mirrored networking (set networkingMode=mirrored in .wslconfig).
Install NFS client tools in WSL:
```
sudo apt-get update
sudo apt-get install nfs-common
```
Attempt to mount an exported NFS share:
```
sudo mount -v -t nfs serverIP:/path /mnt/test
```
The command eventually returns an error:
```
mount.nfs: mount: Connection timed out
```

### Expected Behavior

The NFS share should mount successfully inside WSL 2, just like it does from a Raspberry Pi or other standard Linux environment on the same LAN.

### Actual Behavior

The mount attempt times out.
No traffic is visibly blocked by the Windows Firewall (which I turned off for testing).
Reverting to non-mirrored networking mode in .wslconfig and restarting WSL immediately fixes the issue.
So it appears mirrored networking specifically interferes with NFS.

### Diagnostic Logs

From wsl client with mirrored networking:
```
$ rpcinfo -p
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper

$ showmount -e ub-nuc
Export list for ub-nuc:
/home/wpwoodjr 192.168.86.0/24

$ nc -vz ub-nuc 2049
Connection to ub-nuc (192.168.86.200) 2049 port [tcp/nfs] succeeded!

$ sudo mount -v -t nfs ub-nuc:/home/wpwoodjr /home/wpwoodjr/ub-nuc
mount.nfs: timeout set for Mon Jan 27 13:45:44 2025
mount.nfs: trying text-based options 'vers=4.2,addr=192.168.86.200,clientaddr=192.168.86.41'
mount.nfs: mount(2): Invalid argument
mount.nfs: trying text-based options 'vers=4,minorversion=1,addr=192.168.86.200,clientaddr=192.168.86.41'
mount.nfs: mount(2): Connection timed out
mount.nfs: Connection timed out
```

After disabling mirrored networking:
```
$ sudo mount -v -t nfs ub-nuc:/home/wpwoodjr /home/wpwoodjr/ub-nuc
mount.nfs: timeout set for Mon Jan 27 14:44:39 2025
mount.nfs: trying text-based options 'vers=4.2,addr=192.168.86.200,clientaddr=172.24.87.14'
mount.nfs: mount(2): Invalid argument
mount.nfs: trying text-based options 'vers=4,minorversion=1,addr=192.168.86.200,clientaddr=172.24.87.14'

$ ls ub-nuc
Desktop Downloads Music Public Videos linux-dev snap win10.log
Documents ...
```

Start by reproducing the failure with networkingMode=mirrored in .wslconfig, nfs-common, and the documented mount command, then compare it with legacy NAT networking. Use the supplied rpcinfo, showmount, and nc results to investigate where the NFS mount path differs; done means mirrored networking mounts the export successfully or its NFS limitation is documented.

Written by the indexing model from the issue text.