In the rlm_exec module for change of attributes according to result of script it is used if (output_pairs) pairmove(output_pairs, &answer); in function static int exec_dispatch(void *instance, REQUEST *request) But function pairmove in valuepair.c does only the following /* * Move attributes from one list to the other * if not already present. */ void pairmove(VALUE_PAIR **to, VALUE_PAIR **from) I.e. if such attribute does not exist that it will be added, and if already exists, will take place nothing. As result using an external script we can only add new attributes, but we can not change existing attributes! How to change User-Name in Radius request? Is it possible to change existing attributes in the simple way without change of the module rlm_exec code? Dmitry