hi timk74 - thanks for the info.  Unfortunately it did not work.

I do have an update though - i think it is a restriction at the ISP.  I tried connecting to another ISP and it seems to be working fine: but as soon as I move back to the other ISP, it seems blocked.  Funny though that my ETH mining on miningpoolhub (port 17020) is not affected in any way 

 * VERSIONS:     XMRig/2.6.2 libuv/1.20.2 gcc/7.3.0
 * HUGE PAGES:   available
 * CPU:          Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz (1) x64 AES-NI
 * CPU L2/L3:    1.5 MB/12.0 MB
 * THREADS:      6, cryptonight, av=0, donate=1%
 * POOL #1:      stratum+tcp://europe.cryptonight-hub.miningpoolhub.com:20580
 * API BIND:     0.0.0.0:3334
 * COMMANDS:     hashrate, pause, resume
[2018-05-09 19:09:01] READY (CPU) threads 6(6) huge pages 6/6 100% memory 12.0 MB
[2018-05-09 19:09:03] use pool europe.cryptonight-hub.miningpoolhub.com:20580 172.104.126.71
[2018-05-09 19:09:03] new job from europe.cryptonight-hub.miningpoolhub.com:20580 diff 40000 algo cn/1
[2018-05-09 19:09:33] new job from europe.cryptonight-hub.miningpoolhub.com:20580 diff 40000 algo cn/1
[2018-05-09 19:09:36] accepted (1/0) diff 40000 (509 ms)

Got a similar error with XMR-STAK:  SOCKET ERROR - [europe.cryptonight-hub.miningpoolhub.com:20580] 

Can I please ask someone to share their Windows Firewall Config for port 20580? 

I would really appreciate it.

Just recently (about 2 weeks ago), I started getting the error "Cannot resolve xxxxx".

I have checked and added a Firewall rule on 20580 for TCP but still get this.  I am on MiningPoolHub.

Any ideas?  I am mining Monero on CPU. Command Line looks like this:

NsCpuCNMiner64.exe -pow7 1 -o ssl://europe.cryptonight-hub.miningpoolhub.com:20580 -u x10bulls.rsabluebulls -p x

╔════════════════════════════════════════════════════════════════╗
║              Claymore CryptoNote CPU Miner v4.0                ║
╚════════════════════════════════════════════════════════════════╝
XMR: 1 pool is specified
Main pool is europe.cryptonight-hub.miningpoolhub.com:20580
64-bit version
CPU supports AES-NI - faster mining!
Logical CPU cores: 12
Number of threads: Autoselection...
Using 6 threads
scfg: 0
FAST MODE ENABLED!
1 pool specified.
Remote management (READ-ONLY MODE) is enabled on port 3333
Press "s" key for statistics.
Cannot resolve 'europe.cryptonight-hub.miningpoolhub.com'
Stratum - Cannot connect  to europe.cryptonight-hub.miningpoolhub.com port 20580
Stratum - Failed to connect, retry in 20 sec...

Would you care to share your command line?  also getting 30.5 Mh/s on ETH

Hi,  Is it worth mining a second coin on Sapphire Radeon Nitro+ RX580 4GB or rather ETH only. (I have 4x Sapphire Radeon Nitro+ RX580 4GB)

I'm currently mining on miningpoolhub and convert coins to ETH wallet.

I am struggling to setup command line for a second coin to test (not sure which 2nd coin is best/most profitably to mine?).

My command line to miningpoolhub looks as follows:

EthDcrMiner64.exe -r -1 -mport 13333 -epool europe.ethash-hub.miningpoolhub.com:17020 -ewal x10bulls.rsabluebulls -epsw x -esm 2 -allpools 1 -allcoins 1 -platform 1 -powlim -10

Thank you for your advise/assistance.