ZeroSSL fails to renew due to Nginx port 80 not open
My steem load balancer node (https://api.steemyy.com) fails with SSL error this morning:
It turns out the SSL error, and I was trying to renew it manually with .acme.sh
It failed. And the reason was that the nginx port 80 was not opened (i closed it previously to enhance security without awaring of this).
After renewing the SSL, the node is back online!
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