Cannot connect to PostgreSQL Remotely on Amazon EC2 instance using PgAdmin

Question

I have a micro free tier RHEL 6 instance running and have postgresql 9.2 installed using the yum instructions here: http://yum.pgrpms.org/howtoyum.php

And I am able conn

Answer 1

Looks your pg_hba.conf misses the "+" after the group name. try

# TYPE DATABASE USER ADDRESS METHOD host all pgadmin+ 0.0.0.0/24 trust host all all [my ip]/24 md5

The pg_hba.conf explains about user:

The value all specifies that it matches all users. Otherwise, this is either the name of a specific database user, or a group name preceded by +. (Recall that there is no real distinction between users and groups in PostgreSQL; a + mark really means "match any of the roles that are directly or indirectly members of this role", while a name without a + mark matches only that specific role.)