Hi,
I was about to join the
http://intensecoin.com/pool/ and when I was in the process of pointing my rigs to the pool (I have ~ 20 rigs), I got the "your IP is banned" msg.
WTF people?! Are you banning miners? Was using port 7777, but miner (xmr-stak) was changing difficulty. There is no contact email on the pool, only Slacker which I've never used and don't know how to use. And I have a static IP. Jeez! ...
I had some issues as well in the past -- if too many rejected shares are sent you get IP banned. Seems to be the same on all ITNS pools.
How fast are your machines ? I am using port 9999 for all my GPU rigs -- haven't had an issue since doing that.