No clue. Let me check the logs to see if that provides any info.
Also, are you connecting to port 3334? That diff starts at 65535 and lowest it goes is 8192.
Yes, I'm on port 3334 ... It disconnects and connects again randomly ...
Edit: It happened again just now ...
Ok... you're connected to both my US and EU stratum servers. The US stratum server logs show nothing out of the ordinary.
The EU stratum server logs show a couple of workers. One from I'm assuming your own gear, the other from NH Amsterdam proxy. The one coming from the NH proxy was submitting shares fine, but then it disconnects. There's definitely no "difficulty too low" problem on my end... here are your most recently submitted shares from that order:
2016-05-06 13:24:42 [Pool] [bitcoin] (Thread 6) Share accepted at diff 12673.33069351/13075.50487595 by eghigo.worker2 [37.58.65.213]
2016-05-06 13:24:55 [Pool] [bitcoin] (Thread 6) Share accepted at diff 12673.33069351/35108.28503008 by eghigo.worker2 [37.58.65.213]
2016-05-06 13:25:00 [Pool] [bitcoin] (Thread 6) Share accepted at diff 12673.33069351/25616.28048247 by eghigo.worker2 [37.58.65.213]
2016-05-06 13:25:03 [Pool] [bitcoin] (Thread 6) Share accepted at diff 12673.33069351/13540.38685708 by eghigo.worker2 [37.58.65.213]
2016-05-06 13:25:06 [Pool] [bitcoin] (Thread 6) Share accepted at diff 12673.33069351/24829.04734732 by eghigo.worker2 [37.58.65.213]
2016-05-06 13:25:14 [Pool] [bitcoin] (Thread 6) Share accepted at diff 12673.33069351/18078.31012933 by eghigo.worker2 [37.58.65.213]
2016-05-06 13:25:17 [Pool] [bitcoin] (Thread 6) Share accepted at diff 12673.33069351/19512.18161107 by eghigo.worker2 [37.58.65.213]
2016-05-06 13:25:18 [Pool] [bitcoin] (Thread 6) Share accepted at diff 12673.33069351/22088.41303395 by eghigo.worker2 [37.58.65.213]
2016-05-06 13:25:22 [Pool] [bitcoin] (Thread 6) Share accepted at diff 12673.33069351/182879.02455499 by eghigo.worker2 [37.58.65.213]
Then, the order stops submitting shares altogether. Once that happens for over 10 minutes, the pool disconnects your worker. The worker immediately reconnects, but doesn't attempt to submit any shares:
2016-05-06 13:27:06 [Pool] [bitcoin] (Thread 2) Authorized eghigo.worker2[37.58.65.213]
2016-05-06 13:37:36 [Pool] [bitcoin] (Thread 2) Connected timed out for eghigo.worker2 [37.58.65.213]: last submitted a share was 630 seconds ago
2016-05-06 13:39:38 [Pool] [bitcoin] (Thread 4) Authorized eghigo.worker2[37.58.65.213]
2016-05-06 13:49:42 [Pool] [bitcoin] (Thread 4) Connected timed out for eghigo.worker2 [37.58.65.213]: last submitted a share was 604 seconds ago
2016-05-06 13:51:32 [Pool] [bitcoin] (Thread 5) Authorized eghigo.worker2[37.58.65.213]
2016-05-06 14:02:17 [Pool] [bitcoin] (Thread 5) Connected timed out for eghigo.worker2 [37.58.65.213]: last submitted a share was 645 seconds ago
It's a problem on NH end, not on my pool.