@cr1776 Thank for your reply
Host of bitcoind don't enable firewall, and I added real IP of site to bitcoin.conf. I connected to bitcoind by rpc from orther host and it's working, only host use cloudflare can not connect.
I'm not sure what you mean "only host use cloudflare can not connect.". If you mean you are trying to connect using the cloudflare dns entry, then I don't think that will ever work. You'll have to use the ip. If you look at cloudflare, you'll see it is the same as connecting using ftp etc - you'd have to use the ip.