Jerry Levan <jerry.levan@xxxxxxxxx> writes: > The below fails... the 'fe80....' is the ip6 address of big box. > [jerry@bigbox ~]$ psql -h bigbox > psql: error: FATAL: no pg_hba.conf entry for host "fe80::fe3f:dbff:fed1:f62e%enp7s0", user "lxxx", database "lxxx", SSL off This is mostly a matter of how your local DNS is configured, not PG per se. What does "nslookup bigbox" say? > What did I have to do get the 'fatal' above case to work? Adjust your DNS setup to return the IPv4 address first. Or, perhaps, change PG's listen_addresses so that it's not listening on an IPv6 address at all. There's not going to be much point in that if you don't want to put IPv6 entries into pg_hba.conf. regards, tom lane