Unable to access Plex Media Server on Synology NAS

Plex Media Server
11

You were able to reach the server via app.plex.tv, which indicates it is working and correctly registered with servers at plex.tv. This is good.

The indirect connection points to something in the network. The PC cannot communicate directly with the Plex server. The connection is tunneled through a server at plex.tv.

These can be a pain to track down. Here’s some things to check. Hopefully one of them will help.

If you’ve a VPN on your PC or the NAS, make sure it is disconnected.

On Windows PCs, make sure the network interface is private, not public.
Settings → Network & Internet → Status → Properties.
If public, then the PC is isolated from other devices on the network. This will cause indirect connections to a Plex server.

Try to ping the NAS from your PC.

  1. Open a CMD window (c:\ prompt).
  2. enter ping 192.168.2.154
  3. You should see “Reply from…” messages
  4. If you see “destination unreachable” type messages, then the PC cannot communicate directly with the NAS.
ping example 
c:\>ping 192.168.1.50

Pinging 192.168.1.50 with 32 bytes of data:
Reply from 192.168.1.50: bytes=32 time<1ms TTL=64
Reply from 192.168.1.50: bytes=32 time<1ms TTL=64
Reply from 192.168.1.50: bytes=32 time<1ms TTL=64
Reply from 192.168.1.50: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.1.50:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

c:\>ping 192.168.1.51

Pinging 192.168.1.51 with 32 bytes of data:
Reply from 192.168.1.70: Destination host unreachable.
Reply from 192.168.1.70: Destination host unreachable.
Reply from 192.168.1.70: Destination host unreachable.
Reply from 192.168.1.70: Destination host unreachable.

Ping statistics for 192.168.1.51:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

c:\>


Make sure the browsers allow local network access. See Important note about the Plex Web app - Local Network Access.


For devices connected via wi-fi, are they on a “guest” network, or other network that would isolate them from the rest of your home net?


Double check the NAS network settings.

  • network mask: Usually 255.255.255.0.
  • gateway: The IP address of your router.
  • DNS: Use a public DNS server such as 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google).


Perform a “network reboot.”

  • Reboot the router.
  • When the router is fully back online, reboot the NAS.
  • When the NAS is back online, reboot your PC.