Here are parts of my config as well as parts from debug, and I must be doing something wrong or missed something. I am trying to set the NAS-Identifier, since it is not sent in the access-request packet, and use this later in the post-auth section. As you can see, later in the post-auth section, the attribute is NULL. <debug output> rad_recv: Access-Request packet from host 192.168.0.251:1024, id=61, length=60 User-Name = "60:07:93" NAS-IP-Address = 192.168.0.251 NAS-Port = 1 User-Password = "buywavc" <snip> users: Matched entry DEFAULT at line 18 users: Matched entry DEFAULT at line 21 <users file (lines 18-21) > DEFAULT NAS-IP-Address == "192.168.0.251", NAS-Identifier := "LAB_CCU" Fall-Through = Yes DEFAULT User-Name =~ "^6[0-9a-f]:[0-9a-f]\{2}:[0-9a-f]\{2}$", Post-Auth-Type := "waverider" <debug output (NAS-Identifier did not get set...)> sql: postauth_query = "update wireless_data set tower = '%{NAS-Identifier}' where serial = 'E' + substring('%{User-Name}',2,1) + substring('%{User-Name}',4,2) + substring('%{User-Name}',7,2)" <snip> Login OK: [60:07:93] (from client LAB_CCU port 1) Found Post-Auth-Type waverider Processing the post-auth section of radiusd.conf modcall: entering group waverider for request 0 rlm_sql (waverider): Processing sql_postauth radius_xlat: '60:07:93' rlm_sql (waverider): sql_set_user escaped user --> '60:07:93' radius_xlat: 'update wireless_data set tower = '' where serial = 'E' + substring('60:07:93',2,1) + substring('60:07:93',4,2) + substring('60:07:93',7,2)' rlm_sql (waverider) in sql_postauth: query is update wireless_data set tower = '' where serial = 'E' + substring('60:07:93',2,1) + substring('60:07:93',4,2) + substring('60:07:93',7,2) rlm_sql (waverider): Reserving sql socket id: 9 rlm_sql (waverider): Released sql socket id: 9 modcall[post-auth]: module "waverider" returns ok for request 0 modcall: leaving group waverider (returns ok) for request 0 Sending Access-Accept of id 61 to 192.168.0.251 port 1024 Waverider-Grade-Of-Service = silver Waverider-Priority-Enabled = disabled Thanks, Duane Cox