using wireshark to examine a udp dns capture

Click Stop to stop the Wireshark capture when you see Google’s home page. Open a web browser and type Press Enter to continue.Į. Use the Interface List to choose the interface that isĪssociated with the recorded PC’s IP and MAC addresses in Part 1.Īfter selecting the desired interface, click Start to capture the packets.ĭ. Select an interface for Wireshark to capture packets. Click the Windows Start button and navigate to the Wireshark program.ī. The UDP transport protocol while communicating with a DNS server.Ī. In Part 2, you will set up Wireshark to capture DNS query and response packets to demonstrate the use of In Part 1, you will use the ipconfig /all command on your local PC to find and record the MAC and IP Packet sniffer is an issue, the instructor may wish to assign the lab as homework or perform a walk-throughġ PC (Windows 7 or 8 with a command prompt access, Internet access, and Wireshark installed) It is recommended that permission be obtained before running Wireshark for this lab. Instructor Note: Using a packet sniffer, such as Wireshark, may be considered a breach of the security policy This lab assumes that you have Internet access. Note: This lab cannot be completed using Netlab. You will use Wireshark to examine the DNS query and response exchanges with the same server. In this lab, you will communicate with a DNS server by sending a DNS query using the UDP transport UDP is connectionless and does not require a session setup as does TCP.ĭNS queries and responses are very small and do not require the overhead of TCP. Your PC’s DNS server query and the DNS server’s response make use of the User Datagram Protocol (UDP)Īs the transport layer protocol. You type a website URL into your browser, your PC performs a DNS query to the DNS server’s IP address. Network of servers that translates user-friendly domain names like to an IP address. If you have ever used the Internet, you have used the Domain Name System (DNS). Part 3: Analyze Captured DNS or UDP Packets Part 2: Use Wireshark to Capture DNS Queries and Responses Part 1: Record a PC’s IP Configuration Information Instructor Note: Red font color or gray highlights indicate text that appears in the instructor copy only.

Lab - Using Wireshark to Examine a UDP DNS Capture (Instructor

Using wireshark to examine a udp dns capture