The RST packet is the “refusal.” This happens when a TCP listener is on the target port (default AnyDesk port 7070 ). Crucially, this differs from:
Open AnyDesk and go to Settings > Connection . win32 error 10061 anydesk
If your computer is trying to connect through a proxy server that isn't configured for AnyDesk, the connection will fail. The RST packet is the “refusal