Replacing line 92/93 if ($server != 'all') $s = "AND NASIPAddress = '$server'";
with if ($server != '' && $server != 'all') $s = "AND NASIPAddress = '$server'"; solves a problem when running with PostgreSQL. "Database query failed: ERROR: invalid INET value '' " - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html