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From: Ron Johnson <[email protected]>
To: pgsql-general <[email protected]>
Subject: Re: Postgres listens on random port
Date: Tue, 5 Nov 2024 09:40:47 -0500
Message-ID: <CANzqJaCsm8jdaZhTkrrrjpMe18KvVww29S9DxteeUU55WEFY9Q@mail.gmail.com> (raw)
In-Reply-To: <CACO9DYKsL8iisNBCxk6jtg1ZNdDYisKzdfT-9HcBVgOBjfCouQ@mail.gmail.com>
References: <CACO9DYKtYpE4yeV1r4Gp4hFC7=n_-fG7+Bj35F5M+v0s=ZEDWw@mail.gmail.com>
	<CAKAnmm+iDooPV=6WgJMeaXiUeCJ26NMU6ZrH00W2JNziQJv3JA@mail.gmail.com>
	<CACO9DYKsL8iisNBCxk6jtg1ZNdDYisKzdfT-9HcBVgOBjfCouQ@mail.gmail.com>

On Tue, Nov 5, 2024 at 9:22 AM Kal <[email protected]> wrote:

>
> On Tue, 5 Nov 2024 at 7:42 PM, Greg Sabino Mullane <[email protected]>
> wrote:
>
>> Start by seeing where the port is actually being set by running this:
>>
>> select setting, source, sourcefile, sourceline from pg_settings where
>> name = 'port';
>> Cheers,
>> Greg
>>
>> Hi Greg,
>
> The query output states the source as command line. Event the port value
> output from show port is same as given in pg_ctl command.
>
> But the database is listening on some other random port.
>

*Client* applications use a random port on *their* host:  In this case,
10.176.242.216 is the client, and 10.109.165.4, and 10.176.252.201 are the
DB servers:

$ netstat -an | grep :5432
tcp        0      0 10.176.242.216:37086    10.109.165.4:5432
ESTABLISHED
tcp        0      0 10.176.242.216:43256    10.176.252.201:5432
TIME_WAIT
tcp        0      0 10.176.242.216:36172    10.143.170.55:5432
 TIME_WAIT
tcp        0      0 10.176.242.216:36142    10.143.170.55:5432
 TIME_WAIT
tcp        0      0 10.176.242.216:36156    10.143.170.55:5432
 TIME_WAIT
tcp        0      0 10.176.242.216:36174    10.143.170.55:5432
 TIME_WAIT
tcp        0      0 10.176.242.216:38998    10.109.165.4:5432
TIME_WAIT
tcp        0      0 10.176.242.216:36186    10.143.170.55:5432
 TIME_WAIT
tcp        0      0 10.176.242.216:36188    10.143.170.55:5432
 ESTABLISHED
tcp       19      0 10.176.242.216:36196    10.143.170.55:5432
 ESTABLISHED
tcp       19      0 10.176.242.216:36208    10.143.170.55:5432
 ESTABLISHED
tcp        0      0 10.176.242.216:36210    10.143.170.55:5432
 ESTABLISHED

-- 
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> crustacean!


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