Cannot connect to postgres from remote host

Question

I have a database server (192.168.1.50) running postgres. I have created a database named \"testdb\" and a user \"testuser\" with password \"testuserpw\".
Locally, I can

Answer 1

On Ubuntu, I noticed that remote access at some point stopped working (currently using 9.1.9). The reason is, that postgres is no longer started with the -i switch [1] so no matter what you configure for listen_addresses, it will be ignored.

Fortunately, adding the following line to /etc/environment solves the problem after logging out and in again (or reboot):

PGOPTIONS="-i"

See [2] for more options. Note, that adding this to /etc/postgresql/9.1/main/environment did NOT work for me.

Now, when doing nmap ip-of-my-remote-server I finally get this again:

5432/tcp open  postgresql

Yay!

[1] http://www.postgresql.org/docs/9.1/static/runtime-config-short.html

[2] http://www.postgresql.org/docs/9.1/static/libpq-envars.html