Hi list: I want your help to understand how freeradius uses NAS-Port attribute within rlm_ippool module I was looking for the interpretation of this attribute but i couldn't find more that "it's the physical port from which the request has come" reading the rlm_ippool code I've found that freeradius is using "NAS-IP, NAS-Port" pair as a key to search in the ippool file right ? so my questions are: 1- what does it mean with ("rlm_ippool: Searching for an entry for nas/port: %s/%u",key.nas,key.port)? does it mean that freeradius is searching for entries reserved by this nas/port ? and if this was true why it then set active entries to zero ? why it assume that this IP is not in use "i assume that active ip entry means it's in use"? 2- regarding mppp, i assume that NAS-Port should be unique for all sessions other that mppp sessions. those mppp sessions must share the same NAS-Port. is this the right use of the NAS-Port attribute? 3- according to sum of my assumptions, all auth requests that will be handled by the same rlm_ippool instance and that all have the same NAS-IP, NAS-Port, CLI will certainly have the same ip address reserved for them in the post_auth section, and any change in the triple (nas-ip, nas-port, cli) will certainly cause them to have different ip address assignment. is this true? please correct me? any pointer will be very helpful, as i couldn't find helpful resources Thanks in advance -- Muhammad Tayseer Alquoatli