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If you can automate DNS, create a wildcard LE cert and have a cronjob to maintain it around your different places from the one place you issue it. That is what
by isthisfree 5y ago
If you can automate DNS, create a wildcard LE cert and have a cronjob to maintain it around your different places from the one place you issue it. That is what I do.
Before that I just bought one wildcard cert and used that. Can be bought at less than 50 bucks and then no hassle.
If I could not automate DNS and I don't have 50 bucks per year for it, I would create a small CA myself, trust it in my browsers and issue certificates from that.