@tobiasfrajka I feel your pain. I had similar issues with trying to cast Youtube from phone on one subnet to my xbox on another subnet. Of course I made sure it worked when on the same subnet. Followed all the tutorials, videos, threads and suggestions, and had any-any rules on both networks but I eventually gave up. I don't know if I was missing something or if something has fundamentally changed with how casting, SSDP/mDNS works and whether the solutions people once had success with is still relevant? I was actually more interested in understanding why it didn't work than anything else, but never got to the bottom of it. I was even trying to compare packet captures of the working setup on the same subnet vs. the broken one, but I had no idea what the packet process should look like when it's working. I wish someone with deeper knowledge could shed some light on that or how to troubleshoot such issues.