Re: 8.4 vs. 9.x: 127.0.0.0/8

On 11 Aug 2015 5:56 PM, Adrian Klaver wrote:
> On 08/11/2015 01:19 PM, Felipe Gasper wrote:
>> Hello all,
>>
>>      We are noticing what appears to be a significant difference between
>> PostgreSQL 9.x and 8.4. Not having found documentation that would point
>> us in the direction of a good solution, I thought I’d post our issue
>> here.
>>
>> On CentOS 6 we have postgresql 8.4.20 and the following pg_hba.conf:
>>
>> local samerole all        md5
>> host samerole all  127.0.0.200   255.255.255.255   pam
>> pamservice=postgresql_cpses
>> host samerole all  127.0.0.1   255.255.255.255   md5
>> local all postgres        md5
>> host all postgres  127.0.0.1   255.255.255.255   md5
>>
>> So connections to 127.0.0.200 are handled by pam, connections to
>> 127.0.0.1 are handled by md5.
>>
>> If I run:
>> root@jason:/$ psql -h 127.0.0.200 -U pguser
>> Password for user pguser:
>> psql: FATAL:  PAM authentication failed for user "pguser"
>>
>> You can see it tried to authenticate using PAM authentication.
>>
>> On CentOS 7 we have postgresql 9.2.13 and the following pg_hba.conf:
>>
>> local samerole all        md5
>> host samerole all  127.0.0.200   255.255.255.255   pam
>> pamservice=postgresql_cpses
>> host samerole all  127.0.0.1   255.255.255.255   md5
>> local all postgres        md5
>> host all postgres  127.0.0.1   255.255.255.255   md5
>>
>> But, running the command above yields a different result:
>> root@i-0000764a [/usr/local/cpanel]# psql -h 127.0.0.200 -U pguser
>> Password for user pguser:
>> psql: FATAL:  password authentication failed for user "pguser"
>>
>> It tried to use password auth instead of PAM. We think postgresql might
>> be seeing any 127.0.0.0/8 address as 127.0.0.1. Could you please shed
>> some light on the issue or point us in the right direction on how to
>> make the 9.2.13 configuration function as the 8.4.20 configuration does?
>
> Are you sure you are pointing at the right instance of Postgres?
>
> Or to put it another way, is there more than one Postgres server running
> on the machine?
>

Hi Adrian,

    Thanks for your prompt response!

    There is only one PostgreSQL instance on the PGSQL 9.2 machine.

-F