Hi, take a look at this TOPOLOGY: +--------+ +--------+ | Linux | 202.1.1.1 | Cisco | | Box |------------------| Router |--- INTERNET +--------+ +--------+ | +--------+ | Switch | +--------+ | | | | NAT(1) 192.168.101 | | | | --------------------+ | | | | | | NAT(2) 192.168.102 | | | ----------------------+ | | | | NAT(3) 192.168.103 | | ------------------------+ | | NAT(4) 192.168.104 | --------------------------+ The linux box should do: - act as Router - NAT 1,2,3,4. In NATs segment I may have public IP (202.1.1.15) - Traffic control from 32kb to 512kb based on IP address Each NAT will have in the future about 100-200 hosts. NOTE: this is for a wireless network so maybe the switch could be replaced for some wireless cards on the linux box. I DONT WANT YOU TO DO IT FORE ME !!! Just need to know: if it is possible to do it with iproute2? based on yours experience witch are the best or recomended applications to use or combine? if there are some problems or recomandations I must have to take. is NAT the solution or is there other options? Any other advice? thanks very much