Looking up hostname from IP address and connection problem MS SQL Server from php

Hello,
 
I installed FreeTDS on CentOS 6.6 and I have a connection problem between 
PHP Server and MS SQL Server 2014. I have the following message :
Warning: odbc_connect(): SQL error: [unixODBC][FreeTDS][SQL Server]Unable to connect 
to data source, SQL state S1000 in SQLConnect 
After FreeTDS installation I made a test by :
# tsql -C 
Compile-time settings (established with the "configure" script)
                            Version: freetds v0.91
             freetds.conf directory: /etc
     MS db-lib source compatibility: yes
        Sybase binary compatibility: yes
                      Thread safety: yes
                      iconv library: yes
                        TDS version: 4.2
                              iODBC: no
                           unixodbc: yes
              SSPI "trusted" logins: no
                           Kerberos: yes
 

It is a FreeTDS RPM version that I have got .
Here is Linux Server feature :
CentOS 6.6 
Php 5.3.3
Apache 2.2.15
unixodbc 2.2.14
freetds 0.91
My Windows Server :
Windows Server 2012 R2
MS SQL Server 2014 Standard Edition
Here is the command line that I executed  :
# osql -S MyMSSQLServerName -U user -P password

My result of this command :
checking shared odbc libraries linked to isql for default directories...
strings: '': No such file
 trying /tmp/sqlH ... no
 trying /tmp/sqlL ... no
 trying /etc ... OK
checking odbc.ini files
 cannot read "/root/.odbc.ini"
 reading /etc/odbc.ini
[MyMSSQLServerName] found in /etc/odbc.ini
found this section:
 [MyMSSQLServerName]
 Driver = /usr/lib64/libtdsodbc.so.0
 Description = MSSQL Server
 Trace = No
 Server = 192.168.1.32
 Database = mydatabase
 Port = 1433
 TDS_Version = 7.2
 
looking for driver for DSN [MyMSSQLServerName] in /etc/odbc.ini
  found driver line: " Driver = /usr/lib64/libtdsodbc.so.0"
  driver "/usr/lib64/libtdsodbc.so.0" found for [MyMSSQLServerName] in odbc.ini
found driver named "/usr/lib64/libtdsodbc.so.0"
/usr/lib64/libtdsodbc.so.0 is an executable file
"Server" found, not using freetds.conf
Server is "192.168.1.32"
looking up hostname for ip address 192.168.1.32
osql: warning: no DNS hostname found for "192.168.1.32"
Usage: host [-aCdlriTwv] [-c class] [-N ndots] [-t type] [-W time]
            [-R number] [-m flag] hostname [server]
       -a is equivalent to -v -t ANY
       -c specifies query class for non-IN data
       -C compares SOA records on authoritative nameservers
       -d is equivalent to -v
       -l lists all hosts in a domain, using AXFR
       -i IP6.INT reverse lookups
       -N changes the number of dots allowed before root lookup is done
       -r disables recursive processing
       -R specifies number of retries for UDP packets
       -s a SERVFAIL response should stop query
       -t specifies the query type
       -T enables TCP/IP mode
       -v enables verbose output
       -w specifies to wait forever for a reply
       -W specifies how long to wait for a reply
       -4 use IPv4 query transport only
       -6 use IPv6 query transport only
       -m set memory debugging flag (trace|record|usage)
osql: no IP address found for ""
 
Here is my ODBC configuration 
====================================================================
/etc/odbc.ini for osql
[ODBC Data Sources]
MyMSSQLServerName=MSSQL Server
[MyMSSQLServerName]
Driver = /usr/lib64/libtdsodbc.so.0
Description = MSSQL Server
Trace = No
Server = 192.168.1.32
Database = mydatabase
Port = 1433
TDS_Version = 7.2
[Default]
Driver=/usr/lib64/libtdsodbc.so.0
================================================================
/etc/odbcinst.ini for php
# Example driver definitions
# Driver from the postgresql-odbc package
# Setup from the unixODBC package
[PostgreSQL]
Description = ODBC for PostgreSQL
Driver  = /usr/lib/psqlodbc.so
Setup  = /usr/lib/libodbcpsqlS.so
Driver64 = /usr/lib64/psqlodbc.so
Setup64  = /usr/lib64/libodbcpsqlS.so
FileUsage = 1

# Driver from the mysql-connector-odbc package
# Setup from the unixODBC package
[MySQL]
Description = ODBC for MySQL
Driver  = /usr/lib/libmyodbc5.so
Setup  = /usr/lib/libodbcmyS.so
Driver64 = /usr/lib64/libmyodbc5.so
Setup64  = /usr/lib64/libodbcmyS.so
FileUsage = 1

[FreeTDS]
Driver = /usr/lib64/libtdsodbc.so.0
Setup = /usr/lib64/libtdsS.so
Description = MSSQL Server
Trace = No
Server = 192.168.1.32
Database = mydatabase
Port = 1433
TDS_Version = 7.2
=====================================================================
/etc/freetds.conf
#   $Id: freetds.conf,v 1.12 2007/12/25 06:02:36 jklowden Exp $
#
# This file is installed by FreeTDS if no file by the same 
# name is found in the installation directory.  
#
# For information about the layout of this file and its settings, 
# see the freetds.conf manpage "man freetds.conf".  
# Global settings are overridden by those in a database
# server specific section
[global]
        # TDS protocol version
; tds version = 4.2
 # Whether to write a TDSDUMP file for diagnostic purposes
 # (setting this to /tmp is insecure on a multi-user system)
; dump file = /tmp/freetds.log
; debug flags = 0xffff
 # Command and connection timeouts
; timeout = 10
; connect timeout = 10
 
 # If you get out-of-memory errors, it may mean that your client
 # is trying to allocate a huge buffer for a TEXT field.  
 # Try setting 'text size' to a more reasonable limit 
 text size = 64512
# A typical Sybase server
[egServer50]
 host = symachine.domain.com
 port = 5000
 tds version = 5.0
# A typical Microsoft server
[egServer70]
 host = ntmachine.domain.com
 port = 1433
 tds version = 7.0 ## I added theses lines below  
# MSSQL ServerName
[MyMSSQLServerName]
    host = 192.168.1.32
    port = 1433
    tds version = 7.0
    # client charset = UTF-8
====================================================================================
========

My connection string in php file : 
Driver=FreeTDS;Server=192.168.1.32;Database=mydatabase;

Another information about CentOS, I disabled SELinux .
The osql searches DNS hostname from the IP address that I given but it didn't find.
 
I don't know if the connection problem from php to SQL Server is due by the lookup DNS problem from the IP address.
 
I would like to know what should I do to resolve this connection problem ?
 
Thank you for your response.
 
Best regards.