I noticed recently the top miners on a couple of my SHA256 pools had very large hashrates but were not finding any blocks.
After looking further into the situation I am fairly confident they were cheating the pool. Somehow they are submitting lots of low difficulty shares. I have banned them and earnings are back to estimates. Today one of the cheats created another account which I also just banned.
Using Crypto-Expert's latest version of stratum-mining. Scrypt seems to be unaffected.
Just thought I would put it out there so other pool owners who use this version of stratum-mining are aware there is an issue.
I assume it has something to do with the diff1 setting. If anyone has any ideas what this could be changed to to stop this problems I would be most appreciative!
Have tried both:
diff1 = 0x00000000ffff0000000000000000000000000000000000000000000000000000
and
diff1 = 0x00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff
Topic: WARNING Pool Operators - SHA256 Stratum Exploit in the Wild (Read 739 times)
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