3:51 p.m.
On Wed, Oct 23, 2019 at 10:31 PM Amos via FreeIPA-users
<freeipa-users(a)lists.fedorahosted.org> wrote:
When enrolling a host, an error was presented:
root : INFO Joining realm failed: RPC failed at server. invalid
'hostname': invalid domain-name: only letters, numbers, '-' are allowed.
DNS label may not start or end with '-'
Where does this error originate from? Is it truly impossible to allow hosts with
"_" in their name?
The way I read https://tools.ietf.org/html/rfc1035 and
https://tools.ietf.org/html/rfc952 makes underscores invalid there.
Esp. from RFC1035:
"When creating a new host name, the old rules for HOSTS.TXT should be
followed."
"The labels must follow the rules for ARPANET host names. They must
start with a letter, end with a letter or digit, and have as interior
characters only letters, digits, and hyphen. There are also some
restrictions on the length. Labels must be 63 characters or less."
RFC952 never mentions underscores.
Amos
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