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.\" This source code is released into the public domain.
.Dd June 4, 2025
.Dt LFACME-UALPN 7
.Os
.Sh NAME
.Nm lfacme-ualpn
.Nd validate an ACME challenge via TLS using ualpn
.Sh SYNOPSIS
In
.Xr domains.conf 5 :
.Bd -ragged -offset indent
.Ar domain
challenge=ualpn
.Ed
.Sh DESCRIPTION
The
.Nm
challenge hook will respond to an ACME domain validation using a TLS-based
.Dq tls-alpn-01
authorization.
To use this challenge hook, configure one or more domains with
.Dq challenge=ualpn
in
.Xr domains.conf 5 .
.Pp
The
.Dq tls-alpn-01
challenge expects the authorization token to be provided in response to a
TLS connection to port 443 on the domain to be valided.
This functionality is provided by the
.Xr ualpn 1
daemon, which is part of uacme.
The
.Xr ualpn 1
daemon must be configured and running for this challenge handler to work.
.Sh SEE ALSO
.Xr acme.conf 5 ,
.Xr domains.conf 5 ,
.Xr lfacme 7 ,
.Xr lfacme-renew 8 ,
.Xr ualpn 1
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