Is the pool down or did I my IP's get banned?
Down for me too

I still found that the pool is down from mining and website, but my 4G network can visit to pool website without problem, so I think my IP was banned again by pool

Any DDOS again to pool?
Alright, please try now, I had to adjust the rules to allow people with one IP and multiple nodes mining behind it.
Thanks, Robert! Yes, I'm having 3 PC mining at the same time with same IP.
BTW, are you upgrading the pool now? I see the height = -1, and no wallet version found, all miners gone in the leaderboard.