Currently I have this code block in my eduroam outer server which compares the MAC address of the current authentication attempt to a list of known MAC addresses of test clients which are then used for debugging without having to disrupt service by stopping the daemon and running radiusd -X. if( (UOB-Stripped-MAC == "20:10:7a:1a:89:1d") || (UOB-Stripped-MAC == "bc:cf:cc:a1:a4:10") || (UOB-Stripped-MAC == "e4:ce:8f:49:8c:ae") || (UOB-Stripped-MAC == "a0:ed:cd:5c:66:70") || (UOB-Stripped-MAC == "94:44:52:e7:17:78") || (UOB-Stripped-MAC == "8c:3a:e3:14:eb:10") || (UOB-Stripped-MAC == "bc:c6:db:c7:31:30") ) { # Enable debug messages update control { UOB-Debug = "%{debug:9}" } } It's getting a bit unwieldy to manage this block, so I'm looking for a better way of writing it. However it must be fast, as every eduroam user hits this, i.e. database lookups are unsatisfactory. Flat files might be ok depending on how they cached. Any suggestions for neatening this up a bit, without compromising performance? Thanks, Jonathan