![]() Select one of the frames that shows DHCP Request in the info column. Note: With Wireshark 3.0, you must use the search term dhcp instead of bootp.įigure 1: Filtering on DHCP traffic in Wireshark This filter should reveal the DHCP traffic. Open the pcap in Wireshark and filter on bootp as shown in Figure 1. ![]() This pcap is for an internal IP address at 1. The first pcap for this tutorial, host-and-user-ID-pcap-01.pcap, is available here. NBNS traffic is generated primarily by computers running Microsoft Windows or Apple hosts running MacOS. ![]() DHCP traffic can help identify hosts for almost any type of computer connected to your network. ![]() How do we find such host information using Wireshark? We filter on two types of activity: DHCP or NBNS. If you have access to full packet capture of your network traffic, a pcap retrieved on an internal IP address should reveal an associated MAC address and hostname. In most cases, alerts for suspicious activity are based on IP addresses.
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