An Ubuntu 22.04 endpoint: A Wazuh agent 4.4.3 installed and enrolled to the Wazuh server.This VM has a static IP address of 192.168.0.205. This VM hosts the Wazuh central components (Wazuh server, Wazuh indexer, and Wazuh dashboard). A pre-built, ready-to-use Wazuh OVA 4.4.3: Follow this guide to download the virtual machine (VM).To illustrate the detection of a DHCP starvation attack with Suricata and Wazuh, we use the following setup: In this blog post, we use Suricata and Wazuh to detect a DHCP starvation attack against a DHCP server. It also verifies that the client has an exclusive right to use that IP address and other clients can reach the DHCP client on the assigned IP address. This packet means that the DHCP server has accepted the DHCP client’s request for the assigned IP address. Finally, the DHCP server sends an ACKNOWLEDGEMENT (ACK) packet to the DHCP client on the network. In a DHCP REQUEST packet, the DHCP client confirms its request for the offered IP address and formally asks the DHCP server to assign it.Ĥ. ![]() After the DHCP client receives the OFFER packet from the DHCP server, it sends a DHCP REQUEST to the server. In the OFFER packet, the DHCP server offers an available IP address to the DHCP client.ģ. The DHCP server responds with an OFFER packet. ![]() In a DHCP DISCOVER packet, the DHCP client requests an IP address from a DHCP server.Ģ. When a DHCP client boots up on a network, it sends a DHCP DISCOVER packet to discover a DHCP server. The below steps explain the DHCP DORA process:ġ.
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