Question

Postgresql remote connection not openning necessary ports

I bought a VPS from DigitalOcean with applications Rails+Unicorn+Nginx. I installed Postgresql 9.1 and trying to accept remote connections from that. I read all of the solutions/problems about it (Googled much) and did exactly. The problem is the following:

psql: could not connect to server: Connection refused Is the server running on host "xxx.xxx.xxx.xxx" and accepting TCP/IP connections on port 5432?

I edited the postgresql.conf file with listen_addresses=‘*’ I edited the pg_hba.conf file and added host all all 0.0.0.0/0 md5 I restarted postgresql service and even the VPS however still I cannot connected to the database. So I tried to check the server’s listening ports:

netstat -an | grep 5432
tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN     
unix  2      [ ACC ]     STREAM     LISTENING     8356     /tmp/.s.PGSQL.5432

and then I nmap’ed the server from different machine:

Not shown: 996 closed ports
PORT    STATE SERVICE
21/tcp  open  ftp
22/tcp  open  ssh
80/tcp  open  http
554/tcp open  rtsp

But still I cannot understand why postgresql not serving at the port 5432 after the configurations. I thought it might be caused by iptables. So that I add the following rules:

iptables -A INPUT -p tcp -m tcp --dport 5432 -j ACCEPT
iptables -A OUTPUT -p tcp -m tcp --dport 5432 -j ACCEPT

Still no work. Need advice.

Thanks.


Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.

It definitely seems like you can’t access it due to firewalling. What the full output of iptables -L ?