I have a Synology NAS connected to ethernet ports 4 and 5 using Dynamic Port Aggregation. It has worked fine for well over a year. I usually connect to the NAS through ethernet connections, but I recently tried to connect through a WiFi connection and failed. I tried a variety of devices with the same result: ethernet-connected devices could access the NAS, but WiFi-connected devices could not. I even tried pinging the NAS from the WiFi devices and the ping failed! WiFi could successfully ping other devices on the network whether they were wired or WiFi connected.
I reconfigured the ports on the NAS and Router to use Static Port Aggregation, rather than Dynamic. This workaround resolved the problem. WiFi devices could now connect and ping the NAS.
Is there a problem with this latest firmware release where WiFi devices cannot connect to a device using Dynamic Port Aggregation?
I did not attempt to revert back to the previous firmware version. I usually do not connect to the NAS with WiFi. It may be possible that the problem was in previous versions of the firmware, but I had never seen it.
Here's some background on my troubleshooting...
I had recently installed the Channels DVR server on the NAS. When I installed the Channels client on my Android cell phone and tablet, neither one could connect. It would recognize the IP address of the server, but could not connect to the DVR.
My Fire TV would connect fine with with the DVR/NAS via ethernet. I decided to unplug it and go on WiFi - it could not connect on WiFi. I installed network utilities on the phone and tablet and discovered I could not ping the NAS from the devices that were on WiFi. I could ping other devices on the network, not the NAS. The problem seemed to be unique to the NAS.
I repeated a similar test with a laptop. The laptop could ping the NAS if the laptop was connected by ethernet, but not if it was connected by WiFi. The laptop could ping other devices on the network.
The problem seemed to be isolated to the NAS and WiFi devices and centered on the router itself, since data could not be routed from WiFi to the NAS. The only unique thing about the NAS connection was the dynamic port aggregation. I switched to static port aggregation and that seemed to resolve the problem.
All devices could not ping one another and the DVR client software on WiFi connected devices could connect to the DVR server on the NAS.
