From: Ron <ronljohnsonjr@gmail.com>
To: pgsql-admin@lists.postgresql.org
Subject: Re: postgresql definitive list of network resources used/needed?
Date: Wed, 10 Aug 2022 16:26:34 -0500
Message-ID: <173f35ba-61e7-fef3-b567-38455aecd5b0@gmail.com> (raw)
In-Reply-To: <CAGA3vBstbWk88KvfJD0WzR89omKy9v+P_Z-S4p=_HC0g-xR58w@mail.gmail.com>
References: <CAGA3vBstbWk88KvfJD0WzR89omKy9v+P_Z-S4p=_HC0g-xR58w@mail.gmail.com>
On 8/10/22 16:08, richard coleman wrote:
> I'm currently standing up a number of PostgreSQL 14 servers. There is a
> question concerning ports and protocols required or used by PostgreSQL.
> Unfortunately, I can't seem to find any such listing. Most references
> only mention the primary connection port, ex: tcp 5432.
>
> Apparently, I've discovered that PostgreSQL connects to itself over UDP.
> I've also discovered, while looking at the network while one of our server
> was running PostgreSQL, that while there were a number of connections
> between local 5432 and a random remote port,
That's how TCP IP works; you see the same with ssh, http, dns, etc, etc.
> there was also a connection from a local random port to a remote 5432.
A local process connecting to a remote postgresql database.
> If these ports were closed and only 5432 left open, this connection
> would have failed.
>
> Does anyone know where I might find the definitive listing of ports and
> protocols used by PostgreSQL?
I'm pretty sure I only ever requuest that TCP 5432 be opened in the
firewall, and that as incoming to the DB server.
--
Angular momentum makes the world go 'round.
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-admin@postgresql.org
Cc: ronljohnsonjr@gmail.com, pgsql-admin@lists.postgresql.org
Subject: Re: postgresql definitive list of network resources used/needed?
In-Reply-To: <173f35ba-61e7-fef3-b567-38455aecd5b0@gmail.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox