On Mon, 7 Oct 2019 at 18:27, Ashutosh Sharma <ashu.coe...@gmail.com> wrote: > AFAIU from the information given in the wiki page -[1], the port > numbers in the range of 1-1023 are for the standard protocols and > services. And there is nowhere mentioned that it is only true for some > OS and not for others. But, having said that I've just verified it on > Linux so I'm not aware of the behaviour on Windows. > > [1] - https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
Here are the results of a quick test on a windows machine: L:\Projects\Postgres\install\bin>echo test > c:\windows\test.txt Access is denied. L:\Projects\Postgres\install\bin>cat ../data/postgresql.conf | grep "port = " port = 543 # (change requires restart) L:\Projects\Postgres\install\bin>psql -p 543 postgres psql (11.5) WARNING: Console code page (850) differs from Windows code page (1252) 8-bit characters might not work correctly. See psql reference page "Notes for Windows users" for details. Type "help" for help. postgres=# -- David Rowley http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services