-# place something like this in /etc/sudoers.d/dyndns
-www-data ALL = NOPASSWD: /usr/local/bin/nsupdate_dyndns,/usr/local/bin/nsupdate_dyndns_del
+# place something like this in /etc/sudoers.d/tdyndns
+www-data ALL = NOPASSWD: /usr/local/bin/tdyndns_update