How to EX2 Ultra working on Ethernet but not WIFI?

If your WD My Cloud EX2 Ultra is working properly over Ethernet but not via Wi-Fi, it’s important to clarify one key point: the EX2 Ultra does not have built-in Wi-Fi. It is designed to connect to your network via Ethernet only, and all access—whether local or remote—must go through the router or switch it’s connected to. So when users mention Wi-Fi issues, they are typically referring to their own wireless devices (laptops, smartphones, etc.) being unable to access the NAS over Wi-Fi, not that the NAS itself is wireless.

Let’s break down the possible causes and solutions:

1. Basic Network Topology

Your EX2 Ultra is connected via Ethernet to your router. Devices on the same network—whether wired or wireless—should be able to access the NAS. If your wired desktop sees the NAS but your Wi-Fi-connected laptop or phone doesn't, it’s a network segmentation issue.

2. Check Wi-Fi Network Segregation

Some routers offer a feature called AP isolation, Client isolation, or Guest Mode, which separates Wi-Fi clients from the rest of the network for security. If your device is on a “Guest” Wi-Fi network, it may be blocked from communicating with devices on Ethernet, like your EX2 Ultra.

Solution:

Make sure your Wi-Fi device is connected to the main/home Wi-Fi network, not a guest or isolated network.

In your router’s admin panel, disable AP/Client Isolation or ensure LAN-WLAN bridging is enabled.

3. IP Address Conflict or Subnet Mismatch

Sometimes, the Ethernet and Wi-Fi segments of your network can be on different subnets (e.g., 192.168.0.x for wired and 192.168.1.x for wireless). If this happens, devices on one subnet might not see others.

Solution:

Log in to your router and check the DHCP settings to make sure both wired and wireless clients are on the same subnet.

Confirm that your Wi-Fi and Ethernet clients receive IPs in the same range (e.g., 192.168.1.x).

4. Firewall or Antivirus Blocking on Wireless Devices

Some security software or firewalls might be configured to block network discovery or file sharing when the device is on Wi-Fi.

Solution:

Temporarily disable firewalls and test access.

Ensure network discovery is turned on in Windows or macOS for private networks.

5. Access Method Matters

When accessing from Wi-Fi:

Use the WD My Cloud app or MyCloud.com if File Explorer/Finder isn’t showing the drive.

You can also manually map the NAS using its IP address (e.g., \\192.168.1.100) if name resolution fails.

6. Router Firmware or Bug

Some routers, especially ISP-provided models, have buggy firmware that mishandles traffic between Wi-Fi and LAN clients.

Solution:

Restart the router.

Check for firmware updates.

Consider using a quality third-party router for better NAS support.

Conclusion

Your EX2 Ultra can’t connect via Wi-Fi directly—it depends on your router to bridge traffic between wired and wireless devices. If it’s not accessible from your Wi-Fi devices, the likely causes are network isolation, IP conflicts, or firewall settings. Once corrected, your Wi-Fi devices should communicate with the NAS as smoothly as wired devices do.