I have kind of a naive question, but for the moment it's the only way I found to access a local (I mean, located on the host machine) PostgreSQL database from a docker container, so I'm wondering:

is it considered safe or a good practice to add the public IP -- as given by the interface which is used by the computer to connect to the internet, as shown by ifconfig ; well actually to my router hereunder but the question may be the same when using a VM or a small remote server open to the world -- of a host to the listen_adresses in postgresql.conf file and to add a specific corresponding entry in the pg_hba.conf file?

E.g. with changes as follow in these two configuration files:


listen_addresses = '192.168.xxx.yyy,'


host    all             all             192.168.xxx.yyy/32       scram-sha-256
  • It is unsafe if you don't take appropriate counter measures, like making sure you have good passwords and that those are needed for logging on, or that your router has a firewall which is working to block incoming traffic.
    – jjanes
    Commented Jan 5, 2022 at 15:29
  • 1
    Note that listen_address is for addresses of network interfaces of your server, whereas in pg_hba.conf you authorize adresses of client hosts. So adding your server address 192.168.xxx.yyy/32 in pg_hba.conf does not allow remote connections, in addition to the fact that all addresses starting with 192.168 are private, anyway. Commented Jan 5, 2022 at 20:10

1 Answer 1


Short answer - No.

The Outside World is full of "Ne'er-Do-Wells" that just want to "mess" with anything and everything they kind find to mess with.

This is why Web Servers - like Apache - have so many defensive tools with which to protect themselves against whatever might be thrown at them.
Simply put, Databases - like PostgreSql - just aren't built that way.

This is why most applications you'll see these days are layered, having a client (usually running in a user's web browser), a web server, which can cope with the nefarious "junk" that will get thrown at it and a database, safely nestled away behind protective firewalls and the like and only accessed by trusted connections, such as that from the web server.

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