I’ve been reading through the ACME spec , and I noticed that HTTP validation MUST be done over port 80 (and 443 for https). Why is this? The important thing is that the ACME server connect to the correct IP for the server whose identity is to be validated. The port number would seem to be irreleva…

Why does HTTP validation have to be done on port 80?

system Closed December 3, 2016, 3:20pm 3

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