Thanks Alan for your suggestion. I tried to install freeradius2.1.8, but ran into following error: pateldil@pateldil-desktop:~/freeradius-server-2.1.8[17:00:07]$ sudo dpkg -i ../freeradius_2.1.8+git_amd64.deb Selecting previously deselected package freeradius. (Reading database ... 179982 files and directories currently installed.) Unpacking freeradius (from .../freeradius_2.1.8+git_amd64.deb) ... dpkg: dependency problems prevent configuration of freeradius: freeradius depends on libfreeradius2 (= 2.1.8+git); however: Version of libfreeradius2 on system is 2.1.0+dfsg-0ubuntu4.1. dpkg: error processing freeradius (--install): dependency problems - leaving unconfigured Errors were encountered while processing: freeradius Can't figure out an easy way to install libfreeradius2 (= 2.1.8+git.). Anyways, thanks for your suggestion.