Eu tive que editar meu arquivo pg_hba.conf:
# TYPE DATABASE USER ADDRESS METHOD
# "local" is for Unix domain socket connections only
local all all trust
# IPv4 local connections:
host all all 127.0.0.1/32 md5
# IPv6 local connections:
host all all ::1/128 trust
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local replication postgres trust
#host replication postgres 127.0.0.1/32 trust
#host replication postgres ::1/128 trust
host all all 10.14.4.0/24 md5
host replication postgres 10.14.0.0/16 trust
Mudei os métodos de "trust" para "md5" e isso resolveu meu problema.