How to Find IP for Synology DSM on New Router

We move a lot and so does our Synology NAS DS215j. When we move to a new home, there will be a new router, and Synology DSM needs to be mapped on this new network. It's not always a straightforward transition process though, depending on the difference between the old and the new router. Sometimes it works like a charm without any additional work, and sometimes it feels like moving mountains to do something as basic as finding the IP for the Synology device.

The tricky part is the default IP address for the router. On my previous TP-Link router, the default IP address for LAN is 192.168.0.1, and the DS215j had a static IP address 192.168.0.500.

On the Antbang router for our new home, the default IP address for LAN is 192.168.250.1. Ideally, I want the DS215j to use 192.168.250.500 on the new network. Here's the step-by-step guide of how to achieve that. It's rather counter-intuitive and barely available in any online forum.

0: Forget About Find.Synology.Com

Synology's user guide says find.synology.com can find the Synology device on the same network. It's true, but only works for the initial setup of a brand new Synology. After the initial configuration, this method will NOT work any more, for good security reason.

1: Change the IP of New Router to Match the Old Router

Login to the new router from web address 192.168.250.1.

Change the LAN IP for the new router Antbang to be 192.168.0.1 from its default 192.168.250.1. This is to enable the Synology device to be detectable on this new network.

2: Change the IP for Synology to Match the New Router

Open a web browser and go to 192.168.0.500, the old IP that is stored on Synology's memory. Upon successful connection, go to

Control Panel/Network/Network Interface/LAN/Edit

Change the IP address from 192.168.0.500 to the correct one on the new network 192.168.250.500 and change the gateway IP from 192.168.0.1 to 192.168.250.1

The status bar will hang, the the connection will be lost in a few seconds. This is normal. Don't worry. The new settings have been saved on the Synology device.

3: Change the IP for New Router to Its Default

Login to the new router from its current web address 192.168.0.1.

Change the LAN IP for the new router to be its default one, 192.168.250.1, rebooting the router.

This step is the reverse of Step 1.

4: Test Everything

The new router should be available now at 192.168.250.1, and the Synology device should be available at 192.168.250.500.

The world is at peace now.

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