To find the MAC address on a Synology NAS, navigate to
Control Panel >
Network >
Network Interface, select your active connection from the list, and view the hardware address in the interface details. Alternatively, you can locate the physical label on the rear of the device or use the
ifconfig command via SSH for precise port identification.
Locating the MAC Address via DSM Control Panel
The most reliable method for Synology users is through the DiskStation Manager (DSM) operating system. This approach provides immediate access to the network configuration without requiring external tools or physical interaction with the hardware.
First, log in to your Synology NAS using an administrator account. Once logged in, click the main menu icon in the bottom-left corner of the desktop and select
Control Panel. From the Control Panel window, choose the
Network category. Inside Network settings, click on the
Network Interface tab. You will see a list of all available network interfaces, such as eth0, eth1, or bridge1.
Identify the interface that is currently connected to your local network. The status column will indicate whether the interface is "Connected" or "Disconnected." Select the connected interface by clicking on it once. Look for the
Hardware Address field directly within the interface summary pane. This value represents the Media Access Control address for that specific network port. If your NAS has multiple Ethernet ports, repeat this process for each port to map them correctly.
For users managing complex networks, understanding which MAC address corresponds to which physical port is critical. Incorrect mapping can lead to issues when configuring static IP reservations or MAC filtering on your router. By documenting these addresses alongside their respective ports, you ensure accurate network management. For deeper insights into network connectivity issues, consider reviewing
Synology NAS: Can't View Network through Ethernet Switch and Router.
Physical Label Identification
If you cannot access the DSM interface due to network outages or login issues, the physical label on the NAS chassis serves as a definitive source. Locate the sticker on the back panel of your Synology device. This label typically contains serial numbers, model identifiers, and power ratings.
Look for a section labeled
MAC Address or simply
MAC. Some models display multiple MAC addresses if the device supports dual Ethernet ports or Wi-Fi adapters. The format usually consists of six pairs of hexadecimal digits separated by colons or hyphens, such as 00:11:32:AB:CD:EF. Ensure you record the address corresponding to the correct port if multiple are listed. This method is particularly useful for initial setup phases before the NAS is fully integrated into the network.
Using SSH to Retrieve MAC Addresses
Advanced users may prefer using the command line to retrieve network information. This method offers precision and allows for scripting or automation. First, enable SSH access by going to
Control Panel >
Terminal and SNMP and checking the box for
Enable SSH service. Connect to your NAS using an SSH client like PuTTY or Terminal.
Once connected, execute the command
ip link show. This command displays all network interfaces along with their hardware addresses. Look for lines starting with names like
eth0,
enp0s25, or
br0. The output will include a line reading
link/ether xx:xx:xx:xx:xx:xx. The hexadecimal value following
link/ether is the MAC address for that specific interface. Unlike generic Linux commands, Synology DSM uses standard networking utilities, making this approach consistent across most models. However, always verify the interface name to avoid confusing management ports with data ports.
Troubleshooting Common Issues
Sometimes, users encounter difficulties when trying to locate or utilize MAC addresses. One common problem arises when the displayed address does not match expectations. This often happens if the NAS is using a virtual interface or bridge rather than a direct physical connection. In such cases, the MAC address shown belongs to the bridge, not the individual physical port.
Another issue involves routers failing to recognize the NAS MAC address. This can occur if the address was copied incorrectly or if there is a typo in the router's whitelist. Always double-check the characters against the DSM interface or physical label. Additionally, some ISPs bind services to specific MAC addresses. If you replace your NAS, you may need to clone the old MAC address or update the ISP registration. For broader troubleshooting strategies related to network visibility, refer to resources on
Troubleshooting Laptop MAC Address: NO VENDOR FOUND, although the principles of address verification remain similar.
Frequently Asked Questions
Can I change the MAC address on my Synology NAS?
No, the MAC address is hardcoded into the network interface card and cannot be changed through DSM settings. While some advanced Linux systems allow spoofing, Synology DSM does not provide a native feature to modify this identifier.
Why do I see multiple MAC addresses on my NAS?
Modern Synology devices often support Link Aggregation or bridging, which creates virtual interfaces. Each physical port has its own unique MAC address, while bridges or bond interfaces may have different ones. Check the Network Interface panel to distinguish between physical ports and logical bonds.
How do I find the MAC address if I forgot the admin password?
You can still read the MAC address from the physical label on the back of the device. This method does not require network access or login credentials, making it ideal for recovery scenarios where the NAS is inaccessible.
Is the MAC address the same for all network ports?
No, each Ethernet port on a Synology NAS has a distinct MAC address. If your device has two LAN ports, they will have separate identifiers. This allows for independent configuration and bonding of connections.
What should I do if the MAC address changes unexpectedly?
MAC addresses rarely change unless the network hardware is replaced or a firmware error occurs. If this happens, check for recent hardware updates or contact Synology Support. In rare cases, resetting network settings to default may restore the original addresses.