This tutorial uses: Finding the MAC address other illegal DHCP server on the LAN.
In many cases, some employees always wanted to hang a wireless, thus facilitating their phone traffic. Sometimes a router is placed, provided they did not know, directly linked to the LAN port on the router. It led to the office computer to get the address of the other network segments. While the complexity of the environment, IT managers are often difficult to find, so we need to find out whether the network via DHCP sniffing other routers.
Topology:
Illegal DHCP server segment is 192.168.1.0/24
1. The first copy of our current DHCP Bridge Bridge or the MAC interfaces Interface
I am here as an example is Ether4.
Click Interfaces> Double-click Ether4, copy the MAC address.
2. Click IP> DCHP-Server> Alerts
Click the + sign to create a new DHCP Alert Rules
Fill in your current DHCP interface and MAC address, and then click OK.
In it right, select Show Unknown Servers, you can see the DHCP server violations within the local area network (if any).
At the same time we can open click Log, see the log which has more detailed information.
3. Click Log
This chapter End