PostgreSQL won’t allow remote connections

According to the pg_hba.conf snippet, a password is required if you connect from ::1, which is the IPv6 address for localhost.

It may be that the box on which you have the problem has the resolver configured so that the name "localhost" refers to both 127.0.0.1 (IPv4) and ::1 (IPv6), so that the command psql -h localhost... may connect to one or the other address.

I'd suggest to check the /etc/hosts file for different localhost entries, or bypass the resolver by connecting to 127.0.0.1, or update the pg_hba.conf with "trust" for IPv6 local connections.

Disclaimer - I'm not a huge sys admin buff, so my information may not be correct.. I also realize that the error says "host" - but I don't think that means it has to be a host entry in pg_hba.conf

When you connect to localhost, it uses the loopback address 127.0.0.1 (unless that configuration on your computer has been tampered with) to connect to your system, which counts as a "HOST" connection..

When you connect to "myComputer" (which happens to be your computer name), I'm pretty sure your OS is smart enough to say "oh hey! that's me!" and doesn't even bother resolving an ip address .. it just does a direct connection. This would be a "LOCAL" connection for postgres..

Try adding local all all ::1/128 trust to your pg_hba.conf file..

Then either restart the server, or connect as a superuser and issue select pg_reload_conf() (preferred method).

UPDATE: I tried instead of using the name of the machine, using it's static ipv4 IP address, which worked. The problem has something to do with the ipv6 connection.

That still works because it's still using a HOST connection (instead of a LOCAL one). Try what I suggest and see if you still get an error when connecting to the computer hostname.