thanks, my problem is with kano pool
I mine on all 4 ports from home with a 330GHs miner so I can tell if they are OK.
However ... the pool server blocks the address of anyone who attempts to hack into the server
(my custom code, not any commonly available tool)
If you are using tor or privateinternetaccess (or similar) then that may be the reason.
The current list of blocked IPs is quite a few hundred.
Also of course, If someone has been trying to hack the server from the IP of your miners ... then yep you are blocked