How to Fix WiFi Not Working on a Synology DS-Series NAS: USB Adapter Setup, DSM Network Configuration, and Static IP Fixes

Synology DS-series NAS devices are designed first and foremost for wired Ethernet. Unlike consumer routers or smart TVs, they don’t ship with built-in wireless radios, and Synology’s track record with USB WiFi adapters has gotten significantly more complicated since DSM 7. If your NAS isn’t connecting to your home network — or you’re trying to add wireless capability for the first time — this guide covers every option and fix in plain terms.

The DSM 7 Breaking Change: USB WiFi Adapters Are No Longer Supported

This is the most important fact to understand before spending money on hardware. DSM 7.0 and later versions do not support USB WiFi dongles. Synology removed driver support for USB wireless adapters, USB Bluetooth dongles, 3G/4G modems, and USB audio devices when it launched DSM 7 in 2021. If you plug a WiFi dongle into a NAS running DSM 7, DSM simply will not recognize it.

DSM 6.2 did support a limited list of USB WiFi adapters. Synology maintained a compatibility list, and adapters like the ASUS USB-N10 Nano (which uses a Ralink RT5370 chipset) worked reliably for years. If you’re still running DSM 6.2 and need wireless, those adapters still function — but DSM 6.2 has reached end-of-life and Synology strongly recommends upgrading to DSM 7.

Setting Up a USB WiFi Adapter on DSM 6.2 (Legacy)

If you’re on an older NAS locked to DSM 6.2 and need wireless connectivity, here’s how to configure it after plugging in a compatible USB dongle:

1. Plug the compatible WiFi USB adapter into one of the NAS’s USB 3.0 ports.
2. Log in to DSM and go to Control Panel › Wireless.
3. Click the Wi-Fi tab. If the adapter is recognized, a wireless interface will appear.
4. Click Manage, then Connect to a wireless network.
5. Select your router’s SSID from the list, enter the WiFi password, and click Connect.
6. After connecting, disconnect the Ethernet cable if you want wireless-only operation. Note that Synology recommends keeping at least one wired connection active for reliability.

If the WiFi dongle is not recognized, it is either incompatible or the kernel driver is missing. Synology’s official compatibility list (available at synology.com/compatibility) is the authoritative reference — adapters not on that list have no guaranteed driver support.

Alternatives to USB WiFi on DSM 7

Since DSM 7 blocked USB wireless adapters, the practical solutions for connecting a NAS without running a long Ethernet cable have shifted:

Powerline Adapters

Powerline adapters send a network signal over your home’s existing electrical wiring. You plug one adapter into a wall outlet near your router and connect it via Ethernet, then plug a second adapter near your NAS and connect it via Ethernet to the NAS. No WiFi involved, and it gives you a wired connection without drilling through walls. Speeds vary by wiring quality but modern AV2 powerline kits deliver 200–500 Mbps reliably for NAS use. See our guide on powerline adapters vs mesh WiFi for a full comparison.

MoCA Adapters

If your home has coaxial cable runs (the same cable that carries cable TV), MoCA adapters convert that coax into a gigabit-capable Ethernet backbone. A MoCA 2.5 kit (like the Motorola MM1025) delivers consistent 2.5 Gbps throughput — faster than most NAS drives can sustain — with very low latency. This is the best-performing “no new cable” wired option. See our MoCA adapters guide for setup details.

WiFi Access Point as a Bridge

A travel router or compact access point set to Client Bridge mode connects to your home WiFi wirelessly and then provides a wired Ethernet port. You connect that port to your NAS’s LAN port. The NAS sees only a wired Ethernet connection and DSM never knows WiFi is involved. TP-Link TL-WR902AC and GL.iNet GL-MT300N-V2 are popular options for this use case.

Fix: NAS Not Found on the Network

The most common complaint with Synology NAS networking is “Synology Assistant can’t find my NAS” or the NAS not appearing at its usual IP address. Work through these checks in order:

Check Physical Connection First

Confirm the Ethernet cable is seated firmly in both the NAS and the router/switch. Swap the cable if you have a spare. Check the LAN indicator light on the NAS — it should be solid or blinking green. A dark LED means no link is established at the physical layer, and no software fix will help until that’s resolved.

Use Synology Assistant

Download Synology Assistant (free, available for Windows and macOS from synology.com/support/download). It scans the local network using broadcast packets and lists any Synology devices it finds, along with their current IP addresses. Your PC and your NAS must be on the same subnet (connected to the same router) for this to work. If Windows Defender Firewall is active, it may block the broadcast — temporarily disable it or add an exception for dsassistant.exe to allow discovery.

Check Your Router’s DHCP Table

Log in to your router’s admin page (typically 192.168.1.1 or 192.168.0.1) and look in the DHCP client list for a device named “DiskStation” or “Synology.” If it appears, note the IP address and navigate directly to it in your browser: http://[IP address]:5000. If the NAS doesn’t appear in the DHCP table at all, it has not successfully obtained an IP — check the cable and switch port.

Try the Default Hostname

Before DSM is fully configured, or after a reset, the NAS responds to its default hostname. Type http://diskstation:5000 or http://diskstation.local:5000 directly into a browser on a computer on the same network. This works even when you don’t know the IP address, as long as the NAS has a valid network connection.

Fix: Set a Static IP Address in DSM

If your NAS’s IP address changes after a router restart or DHCP lease renewal — breaking mapped drives, Plex libraries, or backup software that references a fixed address — set a static IP directly in DSM:

1. Log in to DSM and go to Control Panel › Network › Network Interface.
2. Select the LAN 1 interface and click Edit.
3. Under IPv4 settings, switch from Get network settings automatically (DHCP) to Use manual configuration.
4. Enter an IP address outside your router’s DHCP range (e.g., 192.168.1.200 if your router assigns DHCP addresses from .100 to .150).
5. Set the subnet mask to 255.255.255.0 and the gateway to your router’s IP (usually 192.168.1.1).
6. Add at least one DNS server — Cloudflare’s 1.1.1.1 or Google’s 8.8.8.8 both work reliably.
7. Click OK. DSM will reconnect with the static address.

Alternatively, configure a DHCP reservation on your router using the NAS’s MAC address. This assigns the same IP every time without changing DSM settings and is the preferred method if you manage multiple devices this way.

Fix: “Self-Assigned IP” (169.254.x.x)

A self-assigned IP in the 169.254.x.x range means the NAS sent a DHCP request but got no response from the router. It fell back to a link-local address, which is not routable. Likely causes: a bad Ethernet cable, a router port that is disabled or on a different VLAN, or a router that has run out of DHCP leases. Try a different cable, a different switch port, and verify the router DHCP pool has available addresses. Run a speed test from a device already on the network to confirm the router itself is functioning normally before assuming the NAS is at fault.

Resetting DSM Network Settings

If network configuration has become corrupted — wrong gateway, conflicting IP, or a broken DNS entry that prevents DSM from reaching the internet — you can reset only the network settings without wiping any data. Hold the physical RESET button on the back of the NAS for 4 seconds. This restores the NAS to DHCP mode and clears any custom network configuration, but leaves your drives, data, and DSM packages intact. After the reset, use Synology Assistant or the default hostname to reconnect and reconfigure the network interface.