Hi Josh Elser, Thanks for the quick response, Basically my problem is I don't know how to pass /attach the Kerberos's keytab to the driver/DSN. I am using PHP ODBC for the connection. my hortonworks.phoenixodbc.ini [Driver] ErrorMessagesPath=/opt/hortonworks/phoenixodbc/ErrorMessages LogLevel=6 LogPath=/opt/hortonworks SwapFilePath=/tmp I don't see any files logged in the logpath Please check the attachment (the snap shot from the server where the Hadoop set up is 10.150.193.31) the application is hosted on 172.16.14.117 1) using php-jdbc which i am able to connect the phoenix (file name 117-server- jdbc.pcap) 2) using PHP ODBC using horton works odbc driver (file name 117-server - php.pcap) Regards, Vinaya ... View more