Posted 01 December 2012 - 14:16
And what dlink was that - I really find that hard to believe with the way that dhcp works.
So you have say router 1 with a few lan ports, maybe even another switch hanging off 1st router, then say your dlink being used as AP plugged into either first router lan or switch.
Now your client sends out dhcp discover broadcast. Any dhcp server on the network that sees that will send out a dhcp offer, again broadcast to 255.255.255.255, lets assume this is your router. That broadcast will go out every port on its lan switch, then every port on switch and should go out then every other port on your AP dlink, and the wireless even.
So your saying that your dlink intercepted this packet, and changed the dhcp option (3 I do believe) in the packet to its IP, and then resent the packet?? What about devices that were connected to the routers lan port, or the switch. There would be no possible way for the dlink to mess with those packets.
My guess is more that you dlink did not actually turn off its dhcp server, etc.
But you are correct turning off dhcp and just using a lan port is how you use any wireless router as just an accesspoint. What I would suggest is you also change the router your going to use as ap lan IP to something that is on your first routers network, outside its dhcp scope of course so that you can then access the now AP and setup its wireless network how you want, ssid, psk, security options, etc.