XN0PNEWS :: Ethereum under DDOS attack, transfer all your ETH to steemit before it's too late :: XN0PNEWS

DDoS is a type of DOS attack where multiple compromised systems, which are often infected with a Trojan, are used to target a single system causing a Denial of Service (DoS) attack.

I highly recommend you stop mining and get new IP's ASAP

Switch to Parity mining.

Use these settings:

--cache-size-db 1024 --gas-floor-target 1000000 --gasprice 50000000000

If you continue to use geth, use the following settings:

--cache 1024 --targetgaslimit 1000000 --gasprice 50000000000

Parity mining guides:
https://github.com/ethcore/parity/wiki/Mining