$ ze-ndc help
...
$ ze-ndc help setcf
* Trying /etc/ze-filter/ze-ndc.cf
# [Connected to localhost:2010]
200 OK - Waiting for commands !
200 Joe's ze-filter v2.0.0-090131
  SETCF
    * Modify running configuration (overrides ze-filter values)
    * Syntax :
      ze-ndc SETCF option value
200 OK !!