Let's Encrypt : What is the reasoning for why you won't publish the IP addresses of the servers your using for Domain Validation checks? During a nightly AutoSSL check with a server that has 500 or more sites, the script seems to be using too many connections. Then the firewall keeps blocking these validation IP's for too many connections. Then no certs renew. It's ridiculously time consuming trying to figure out which of the hundreds of IP addresses that are blocked every day belong to Let's Encrypt. Then when we finally figure it out, it seems the next month Let's Encrypt is using a different IP.
Why can't you just post the IP's in use so we can white list them and not have to play this game every month?