- #OPEN PCAP FILE WIRESHARK COMMAND LINE HOW TO#
- #OPEN PCAP FILE WIRESHARK COMMAND LINE SOFTWARE#
Start the packet capture process with the capture command in privileged EXEC mode. 
Configure the inside and outside interfaces as illustrated in the network diagram with the correct IP address and security levels. Configure Packet Capture with the CLIĬomplete these steps in order to configure the packet capture feature on the ASA with the CLI: This completes the GUI packet capture procedure. The PCAP files can be opened with capture analyzers, such as Wireshark, and it is the preferred method.ġ1.1 From the Save capture file window, provide the file name and the location to where the capture file is to be saved. Click the radio button next to the format names.ġ0.3 Then, click Save ingress capture or Save egress capture as required. Click Save captures to save the capture information.ġ0.1 From the Save captures window, choose the required format in which the capture buffer is to be saved.ġ0.2 This is either ASCII or PCAP. The captured packets are shown in this window for both the ingress and egress traffic.ĩ. Click Get Capture Buffer in order to view the packets that are captured by the ASA capture buffer. Click Start in order to start the packet capture, as shown:Īs the packet capture is started, attempt to ping the outside network from the inside network so that the packets that flow between the source and the destination IP addresses are captured by the ASA capture buffer.Ĩ. In this example, circular buffer is not used, so the check box is not checked.Ħ.0 This window shows the Access-lists that must be configured on the ASA (so that the desired packets are captured) and the type of packets to be captured (IP packets are captured in this example).ħ. Circular buffers never fill up.Īs the buffer reaches its maximum size, older data is discarded and the capture continues. This data is required for the capture to take place.ĥ.2 Check the Use circular buffer box to use the circular buffer option. If Network Address Translation (NAT) is performed on the Firewall, take this into consideration as well.ĥ.1 Enter the appropriate Packet Size and the Buffer Size in the respective space provided. Navigate to Wizards > Packet Capture Wizard to start the packet capture configuration, as shown:ģ.0 In the new window, provide the parameters that are used in to capture the ingress traffic.ģ.1 Select inside for the Ingress Interface and provide the source and the destination IP addresses of the packets to be captured, along with their subnet mask, in the respective space provided.ģ.2 Choose the packet type to be captured by the ASA (IP is the packet type chosen here), as shown:Ĥ.1 Select outside for the Egress Interface and provide the source and the destination IP addresses, along with their subnet mask, in the respective spaces provided. This example configuration is used in to capture the packets that are transmitted during a ping from User1 (inside network) to Router1 (outside network).Ĭomplete these steps in order to configure the packet capture feature on the ASA with the ASDM:ġ. They are RFC 1918 addresses that are used in a lab environment. The IP address schemes used in this configuration are not legally routable on the Internet. This section provides information used to configure the packet capture features that are described in this document. In addition, it is possible to create multiple captures in order to analyze different types of traffic on multiple interfaces. The packet capture process is useful to troubleshoot connectivity problems or monitor suspicious activity. #OPEN PCAP FILE WIRESHARK COMMAND LINE HOW TO#
This document describes how to configure the Cisco Adaptive Security Appliance (ASA) Next-Generation Firewall in order to capture the desired packets with either the Cisco Adaptive Security Device Manager (ASDM) or the Command Line Interface (CLI) (ASDM).
This configuration is also used with these Cisco products: If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment.
#OPEN PCAP FILE WIRESHARK COMMAND LINE SOFTWARE#
This document is not restricted to specific hardware or software versions.
This procedure assumes that the ASA is fully operational and is configured in order to allow the Cisco ASDM or the CLI to make configuration changes. This document describes how to configure the Cisco ASA firewall to capture the desired packets with the ASDM or the CLI.
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