@Clive_A thanks, its working. really appreciate your kind support

@Clive_A , Thanks for your quick reply. Do you suggest we need to use another device as this feature is not available in omada ER605? If so, then please suggest which router is the best suite for...

We have recently purchase ILL (internet leased line) from telecom provider and they have given 1 WLAN and 4 Public LAN. We have 4 server and we need to assign 4 different public IP on that server....