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Re: BUG #17776: Connections are terminated unexpectedly sometimes - Mailing list pgsql-bugs

From Francesco Tagliani
Subject Re: BUG #17776: Connections are terminated unexpectedly sometimes
Date
Msg-id CAG=uqRuoDuyOZovV-YA41NaLOKwjrLC-Lu4RCRHXnZC3D4eTsA@mail.gmail.com
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In response to Re: BUG #17776: Connections are terminated unexpectedly sometimes  (Tom Lane <tgl@sss.pgh.pa.us>)
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Hi Tom,
The Ubuntu is on Azure, So is it possible port scanning app is automatically installed by azure in ubuntu?

Regarding tcp values, do i need to keep current values or do you have any recommended values?

Thanks

On Tue, Feb 7, 2023 at 12:18 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
Francesco Tagliani <fran.tm213@gmail.com> writes:
> I found some logs I don't understand.

> ```
> 2023-02-05 00:37:16.858 UTC [1739876] [unknown]@[unknown] FATAL:
>  unsupported frontend protocol 65363.19778: server supports 3.0 to 3.0
> 2023-02-06 12:26:48.844 UTC [467480] [unknown]@[unknown] FATAL:
>  unsupported frontend protocol 16.0: server supports 3.0 to 3.0
> 2023-02-06 02:17:08.205 UTC [257863] [unknown]@[unknown] FATAL:
>  unsupported frontend protocol 65363.19778: server supports 3.0 to 3.0
> 2023-02-06 06:37:00.411 UTC [345467] [unknown]@[unknown] FATAL:
>  unsupported frontend protocol 0.0: server supports 3.0 to 3.0
> 2023-02-06 06:37:00.679 UTC [345468] [unknown]@[unknown] FATAL:
>  unsupported frontend protocol 255.255: server supports 3.0 to 3.0
> ```

Something port-scanning your server, perhaps?  None of those
protocol numbers match anything that Postgres-related code
would use.

                        regards, tom lane

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