Problem during secondary verification

[JuergenAuer]

Hi @Disbeleiver

@Disbeleiver

When i run certbot, i see six connections going through router and six SYN connections to the server (using tcpdump). But nginx gets only primary http request, which goes into access log, others are eaten somewhere, have no ideas.

there is your answer. You have a blocking instance, fix that.

The

@Disbeleiver

During secondary validation

error is new. Read

ACME v1/v2: Validating challenges from multiple network vantage points

O…

So your system allows the primary Letsencrypt servers to access your server. But the secondary validation servers are blocked.