From: Scott Ribe <scott_ribe@elevated-dev.com>
To: richard coleman <rcoleman.ascentgl@gmail.com>
Cc: pgsql-admin@postgresql.org
Subject: Re: postgresql definitive list of network resources used/needed?
Date: Wed, 10 Aug 2022 15:24:38 -0600
Message-ID: <200DE464-2992-4D0C-96F1-6656E1CE932A@elevated-dev.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 Aug 10, 2022, at 3:08 PM, richard coleman <rcoleman.ascentgl@gmail.com> 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.
There is whatever port you configure it for; the default is 5432.
> Apparently, I've discovered that PostgreSQL connects to itself over UDP.
No it doesn't. (It can use Unix domain sockets for local connections.)
> 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, there was also a connection from a local random port to a remote 5432. If these ports were closed and only 5432 left open, this connection would have failed.
That sounds like you're confused by the fact that when a client connects to a server, the server port is fixed, but the client chooses a random outbound port.
> Does anyone know where I might find the definitive listing of ports and protocols used by PostgreSQL?
TCP, whatever port you configure it listen on.
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To: pgsql-admin@postgresql.org
Cc: scott_ribe@elevated-dev.com, rcoleman.ascentgl@gmail.com
Subject: Re: postgresql definitive list of network resources used/needed?
In-Reply-To: <200DE464-2992-4D0C-96F1-6656E1CE932A@elevated-dev.com>
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