Destiny 2 not playable over LAN?

I have a very strange problem.

When I'm logged into the router with my laptop via WLAN. Can I play Destiny 2 on Steam? Unfortunately bad because a better / more stable connection would be via LAN. If I connect a LAN cable, I can't get into Destiny2. Internet connection exists. I can access websites. I've also tried the dynamic and static IP. Still not possible. Port releases are also set.

Would be great if someone could help.

As remote diagnosis: unfortunately impossible.

Get information about the "ping" command from wiki and use it to tap the connections step by step.