Other tools may try to connect with different users or with same users but using ip (not local host) and pg_hba.conf file may not allow paswordless login except localhost.Reseting postgres password with alter user, and configuring pg_hba.conf file can solve your problem.
dandl wrote: > I have a new 9.5 installation, Windows x64, developer only. No users have been added, and no passwords > set. > > I can access the system: > · using pgAdmin3, without specifying a user or password > · using psql, specifying user ‘postgres’ but no password > > I cannot access the system with various other tools that require a connection string eg > password authentication failed for user "postgres" > > There is a ‘postgres’ user defined in pg_shadow with password of : > "md5a19959576d12fc69375fc3dadaeab90b" > > What is going on here? Is there a password for user ‘postgres’ or isn’t there? What is it? Why don’t I > need it sometimes, and I do other times?
You have a password set, and it is probably in a password file, which might have been created by pgAdmin III.
