Обсуждение: REVOKE CONNECT doesn't work in 8.3.5

Hi,

It seems REVOKE CONNECT doesn't work as advertised.
I have "trust" entries in pg_hba.conf because my machine is closed.
I added some PG users, and one of them was used in:

REVOKE CONNECT ON DATABASE zozo FROM hs;

However, user "hs" can happily connect to database "zozo"
despite the REVOKE. Documentation says at
http://www.postgresql.org/docs/8.3/interactive/sql-grant.html :

CONNECT
Allows the user to connect to the specified database.
This privilege is checked at connection startup (in addition to checking
any restrictions imposed by pg_hba.conf).

To me, this means that REVOKE CONNECT is a veto over "trust".
Is it not?

Best regards,
Zoltán Böszörményi

--
Bible has answers for everything. Proofs:
"But let your communication be, Yea, yea; Nay, nay: for whatsoever is more
than these cometh of evil." (Matthew 5:37) - basics of digital technology.
"May your kingdom come" - superstitious description of plate tectonics

----------------------------------
Zoltán Böszörményi
Cybertec Schönig & Schönig GmbH
http://www.postgresql.at/

Zoltan Boszormenyi <zb@cybertec.at> writes:
> I have "trust" entries in pg_hba.conf because my machine is closed.
> I added some PG users, and one of them was used in:

> REVOKE CONNECT ON DATABASE zozo FROM hs;

> However, user "hs" can happily connect to database "zozo"
> despite the REVOKE.

Unless you had previously done a specific GRANT CONNECT TO hs,
the above command doesn't do a darn thing.  The privilege that
actually exists by default is a grant of connect to PUBLIC.
What you need to do is REVOKE FROM PUBLIC, and then GRANT to
whichever users/groups you want to allow to connect.

            regards, tom lane

Tom Lane írta:
> Zoltan Boszormenyi <zb@cybertec.at> writes:
>
>> I have "trust" entries in pg_hba.conf because my machine is closed.
>> I added some PG users, and one of them was used in:
>>
>
>
>> REVOKE CONNECT ON DATABASE zozo FROM hs;
>>
>
>
>> However, user "hs" can happily connect to database "zozo"
>> despite the REVOKE.
>>
>
> Unless you had previously done a specific GRANT CONNECT TO hs,
> the above command doesn't do a darn thing.  The privilege that
> actually exists by default is a grant of connect to PUBLIC.
> What you need to do is REVOKE FROM PUBLIC, and then GRANT to
> whichever users/groups you want to allow to connect.
>
>             regards, tom lane
>

Thanks very much for the clarification. The documentation
doesn't spell it out as clearly. Another possibility is that
I can't read and interpret correctly. :-)

--
Bible has answers for everything. Proofs:
"But let your communication be, Yea, yea; Nay, nay: for whatsoever is more
than these cometh of evil." (Matthew 5:37) - basics of digital technology.
"May your kingdom come" - superstitious description of plate tectonics

----------------------------------
Zoltán Böszörményi
Cybertec Schönig & Schönig GmbH
http://www.postgresql.at/