If I ping "eth-eu1.nanopool.org" from cmd, it is 75 ms but the share acceptance time is 215 ms with same server. Is it okay? Yet, there were no invalid or stale shares, and I am getting around 30 shares per hour for 85 mh/s.
ping will send smaller packet than the share itself. I was mining through VPN for some time with 250ms response time and practically got the same results as with direct connection, so you should be fine with 215ms.
Regards,
zeezoo
You can mine Bitcoin with a large ping such as that but if you are mining any coins with an average block time of ~15 seconds or so you will run into too many stale shares. Generally you are creditted for stale shares however keep in mind that you will make more money overall with a faster ping time.
Imagine you and someone else finds a block at the same time, the other guy has a ping of 50ms and yours is 250ms, what will happen is his will get accepted first and their pool will get the credit and not yours and you will make less money overtime.