On August 20, 2011, J <archjpres(at)yahoo(dot)com> wrote:
> We are unsure the best and most secure way to configure hba.conf to
> accept connections from the apache webserver when the IP addresses of
> the webserver tend to change.
>
You have to allow 10.0.0.0/8. Only your own instances will be able to talk
to the port anyway, with appropriate ec2 security groups setup.