Hello Matthew, Thanks for responding. I can see below while running radius in debug mode. Not sure if that’s the case. ``` # Loading module "unix" from file /etc/raddb/mods-enabled/unix unix { radwtmp = "NULL" } ``` Below is the content of unix file: ``` unix { # # The location of the "wtmp" file. # The only use for 'radlast'. If you don't use 'radlast', then # you can comment out this item. # # Note that the radwtmp file may get large! You should # rotate it (cp /dev/null radwtmp), or just not use it. # # Disabled using https://sim.amazon.com/issues/otie-eis-261 # radwtmp = ${logdir}/radwtmp } ``` Not sure if this the case behind it. Thanks & Regards, Nitin Sharma On 01/08/19, 4:56 PM, "Matthew Newton" <mcn@freeradius.org> wrote: On Thu, 2019-08-01 at 09:42 +0000, Sharma, Nitin via Freeradius-Users wrote: > Radius is generating NULL file under / and it keep growing , seems > like accounting logs. > Can somebody help me know how can I disable it as it is filling up > root space over server. FreeRADIUS doesn't do that by default. > Any help or suggestion will be highly appreciated. Look at the debug output and work out where you've configured it to write to "/NULL". Or grepping for "NULL" in raddb should also work. Of course it's also possible you've configured FreeRADIUS to send to syslog, and your syslog daemon is misconfigured. -- Matthew