I'm using a non-standard port (above 10000). Otherwise, nothing special about my configuration. Perhaps 51820 is blocked? It is admittedly quite slow/intermitt

I'm using a non-standard port (above 10000). Otherwise, nothing special about my configuration. Perhaps 51820 is blocked? It is admittedly quite slow/intermittent though; I wouldn't be surprised if that's the reason it didn't look like it was working for you.