Re: BUG #17776: Connections are terminated unexpectedly sometimes

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(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Francesco Tagliani <fran(dot)tm213(at)gmail(dot)com> writes:
> > I found some logs I don't understand.
>
> > ```
> > 2023-02-05 00:37:16.858 UTC [1739876] [unknown](at)[unknown] FATAL:
> > unsupported frontend protocol 65363.19778: server supports 3.0 to 3.0
> > 2023-02-06 12:26:48.844 UTC [467480] [unknown](at)[unknown] FATAL:
> > unsupported frontend protocol 16.0: server supports 3.0 to 3.0
> > 2023-02-06 02:17:08.205 UTC [257863] [unknown](at)[unknown] FATAL:
> > unsupported frontend protocol 65363.19778: server supports 3.0 to 3.0
> > 2023-02-06 06:37:00.411 UTC [345467] [unknown](at)[unknown] FATAL:
> > unsupported frontend protocol 0.0: server supports 3.0 to 3.0
> > 2023-02-06 06:37:00.679 UTC [345468] [unknown](at)[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
>