Connection to node on starlink network extremely slow

SUPPORT QUESTIONS
1

Hello,

I’ve set up tailscale on a friend’s Synology NAS so I can admin it remotely. He’s using Starlink, which of course complicates things.

The connection to the NAS is extremely slow; on the order of ~400KBps (capital ‘B’ according to rsync). It always uses a DERP relay, no matter where I connect from. I know the DERP is slower, but I would have expected to be faster than this, think?

Their starlink connection outside of tailscale is consistently around 100/20 Mbps (down/up)

I followed the instructions here to create ‘/dev/net/tun’, though I think that’s unrelated (and it didn’t help):

I’m not having this performance issue between any other nodes.

Anyway, is there something I can do to get better throughput, or somehow avoid use of the relay?

Or is the problem somehow related the Synology rather than starlink?

2

I’ve been able to improve upon the situation a bit, but still have questions.

I was able to establish a direct connection to the Synology on starlink by forwarding a hard-coded port on my opnsense firewall, even though I already had NAT-PNP enabled. This improved performance somewhat, but it’s still a fraction of what it should be.

So my questions are:

  • Why did I have to manually forward a port to get the direct connection; why didn’t NAT-PNP do the trick? I had verified that port mappings were being dynamically created.
  • What can I do to improve performance further? This seems to be starlink-related, as throughput is plenty fast everywhere else.