Re: problem with Configuring a Connection to a Database using VisualExplain

[Wei Tjioe <wtjioe at cs dot toronto dot edu>]

Thanks. I will try SSL.

tcpip_socket was "true" in my postgresql.conf

Also, I noticed this morning that PostgreSQL Access was able to connect
successfully using md5 in pg_hba.conf (while Visual Explain triggered an SQLException).


Wei


On Thu, 2 Oct 2003, Fernando Nasser wrote:

> Wei,
>
> The client side (in this case JDBC) is not aware of how the server stores it's
> passwords.  They are sent clear text with either 'password' or 'md5' -- they are
> stored encrypted in the server.  If you need more security and don't want clear
> text passwords on the network make the connection using SSL.  The JDBC driver
> supports SSL connection for some time now.
>
> W.r.t. your connection problem, the message may be misleading.  The reason that
> cause the password authentication to fail may have been a communication problem.
> Check if you have the line:
>
> tcpip_socket = true
>
> in your postgresql.conf file (in the PGDATA directory).
>
> Java (and JDBC) cannot connect using Unix sockets, so you must be accepting
> TCP/IP connections.
>
> Regards,
> Fernando
>
>
> Wei Tjioe wrote:> Another observation with Visual Explain is on how it treats
> PASSWORD
> > authentication.
> >
> > For example: in pg_hba.conf
> >
> > local   all                                     md5
> > host    all     127.0.0.1     255.255.255.255   md5
> >
> > This causes Visual Explain to refuse connection based on Password
> > (although connection request through psql, both local and -h, succeeded).
> >
> > Test 1: Driver
> > PASSED
> >
> > Test 2: Connection
> > FAILED
> > Unable to connect to database.
> > Reason: Something ....Please report this exception: Exception:
> > java.sql.SQLException: FATAL 1:
> > Password authentication failed for use "me"
> >
> >
> > When authentication is switched to clear text:
> >
> > local   all                                     md5
> > host    all     127.0.0.1     255.255.255.255   password
> >
> > [root@darwin data]# pg_ctl reload
> > postmaster successfully signaled
> > ...
> >
> > Visual Explain connects to database successfully.
> >
> > Testing Database Connection: testdb
> > Test1: Driver
> > PASSED
> >
> > Test2: Connection
> > PASSED
> >
> >
> > If there's a safer alternative, please post.
> >
> >
> > Wei
> >
> >
>
>
>
> --
> Fernando Nasser
> Red Hat - Toronto                       E-Mail:  fnasser@redhat.com
> 2323 Yonge Street, Suite #300
> Toronto, Ontario   M4P 2C9
>
>