Q: I followed the Hello World! tutorial and I got it
to work in telnet but couldn't get it working in any of the browsers.
A: You missed a step
Q: I'm using App and I get 404's when I try to connect.
Q: I'm using App and I get 403's when I try to connect.
Q: I can connect locally but not remotely or when I run on my server.
A: This is also another security feature! By default Ratchet binds to 127.0.0.1 which only allows connections from itself. The recommended approach is to put Ratchet behind a proxy and only that proxy (locally) will connect.
If you want to open Ratchet up (not behind a proxy) set the third parameter of App to '0.0.0.0'.