That's it! There was a service monitoring application that does a kind of
"nmap -p 5432" to the PostgreSQL server periodically.
2006/1/17, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
>
> Rodrigo Hjort <rodrigo(dot)hjort(at)gmail(dot)com> writes:
> > What is the cause of this line in the LOG?
>
> > [2006-01-16 20:02:03 BRT] [unknown] LOG: incomplete startup packet
>
> Broken client software, or possibly something portscanning your machine.
> It's reporting a bogus connection attempt.
>
> regards, tom lane
>
--
Regards,
Rodrigo Hjort
GTI - Projeto PostgreSQL
CELEPAR - Cia de Informática do Paraná
http://www.pr.gov.br