> First are doing a socket connection or a host connection? Socket 
> connections ignore sslmode.

The URL template of JDBC used by dbeaver is 
jdbc:postgresql://{host}[:{port}]/[{database}]

>From the manual

"The host component is interpreted as described for the parameter host. In 
particular, a Unix-domain socket connection is chosen if the host part is 
either empty or starts with a slash, otherwise a TCP/IP connection is 
initiated."

In our case the host name does not start with a slash.  So I conclude it is 
using TCP/IP.


> psql postgresql://localhost:5432/test?sslmode=require
> 
> 
> psql postgresql://localhost:5432/test?sslmode=disable

We are using dbeaver, not psql. dbeaver also provides disable option for 
sslmode.  I set sslmode=disable and it immediately rejected connection with 
error "SSL Mode off".  

So the puzzle is -> in version 42.1.4 when we do not check "Use SSL " button, 
connection
fails with "SSL Mode off". In that version we check the box "Use SSL" and then 
in the dropdown
for sslmode, we select sslmode=require. Only then the connection passes.

In version 42.2.5 even if we do not check "Use SSL" it still behaves the same 
as 
"Use SSL" checked and sslmode=require. 

I was not able to import the security bulletin fully, but am I right in 
concluding
that JDBC 42.2.5 always turns on sslmode=require unless we explicitly set 
sslmode=disable.

Thanks for your help.

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