Take a Custom Application Packet Capture

You can configure a Palo Alto Networks firewall to take a packet capture based on an application name and filters that you define. You can then use the packet capture to troubleshoot issues with controlling an application. When configuring an application packet capture, you must use the application name defined in the App-ID database. You can view a list of all App-ID applications using Applipedia or from the web interface on the firewall in
Objects
Applications
.
  1. Using a terminal emulation application, such as PuTTY, launch an SSH session to the firewall.
  2. Turn on the application packet capture and define filters.
    admin@PA-220>
    set application dump on application
    <application-name>
    rule
    <rule-name>
    For example, to capture packets for the linkedin-base application that matches the security rule named Social Networking Apps, run the following CLI command:
    admin@PA-220>
    set application dump on application linkedin-base rule "Social Networking Apps"
    You can also apply other filters, such as source IP address and destination IP address.
  3. View the packet capture output to ensure that the correct filters are applied. The output displays after you enable the packet capture.
    The following output confirms that application capture filtering is now based on the linkedin-base application for traffic that matches the Social Networking Apps rule.
    custom-app-pcap-output-10.png
  4. Access linkedin.com from a web browser and perform some LinkedIn tasks to generate LinkedIn traffic, and then run the following CLI command to turn off application packet capture:
    admin@PA-220>
    set application dump off
  5. View/export the packet capture.
    1. Log in to the web interface on the firewall and select
      Monitor
      Logs
      Traffic
      .
    2. In the log entry that you are interested in, click the green packet capture icon packet_capture_icon.png .
    3. View the packet capture directly or
      Export
      it to your computer. The following screen capture shows the linkedin-base packet capture.
    custom-app-pcap-output-ui-10.png

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