I just installed SmartFox on my linux server. Twice I tried just leaving it on, with no connections, just the admin console open on my client. I keep getting these errors every few minutes, but 0 length can't be a max:
The server complains about messages of wrong/unexpected size. Usually this error should appear when a client sends too large data, but it can also come with a 0 bytes long request. This is seen more rarely, actually.
And yes, the error message can be misleading in that case.
It could be a malicious connection, trying to send illegal characters / data which ends up in an empty request, which is rejected.
Have you ever taken a look at a firewall log of a server connected directly to the internet? It's a wild world out there
Seriously, you can literally receive thousands of all sorts of connection attempts, port scans, hack searches etc... every day
