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#Wireshark packet capture steps full#
#Wireshark packet capture steps download#

When the traffic leaves the Firewall (post-NAT), the source IP of the SSH traffic will be 200.1.1.1 TRAFFIC FLOW Let's initiate SSH connection from the CLIENT to the SERVER. I configured a SOURCE NAT policy which translates the source IP of the client to the Palo Alto interface public routable IP of 200.1.1.1 when going out to the Internet.

#Wireshark packet capture steps download#

Step 2 - Configure receive stage RECEIVE STAGE Step 3 - Initiate some traffic and download the capture file CLIENT> ping 172.16.1.10Ĩ4 bytes from 172.16.1.10 icmp_seq=2 ttl=63 time=4.393 msĨ4 bytes from 172.16.1.10 icmp_seq=3 ttl=63 time=1.809 msĨ4 bytes from 172.16.1.10 icmp_seq=4 ttl=63 time=1.618 msĨ4 bytes from 172.16.1.10 icmp_seq=5 ttl=63 time=1.184 ms DOWNLOAD CAPTURE FILE WIRESHARKĪs you can see above, both echo request and echo reply are captured on the receive stage.Įxample 2 - Packet Capture with NAT Diagram NAT DIAGRAM

#Wireshark packet capture steps full#

You will then need to merge both capture files to have the full picture. If you only configure filter Id-1 then the receive stage will capture packet #1 and the transmit stage will capture packet#4. receive stage - packets 1 & 2 (shown on the example below).For this example, one stage (receive) is more than enough. The filter shown below captures both echo request and echo reply on both receive and transmit stage. Packets 3 & 4 are egressing the firewall.Packets 1 & 2 are ingressing the firewall.You can configure packet capture by going to Monitor > Packet Capture RECEIVE AND TRANSMIT STAGES Initiate a ping from CLIENT to the SERVER and capture both ICMP echo request and ICMP echo reply. transmit - captures packets as they egress out of the firewall engine (post-NAT).receive - captures the packets as they ingress the firewall interface before they go into the firewall engine (pre-NAT).

firewall - captures packets in the firewall stage.

Example, security polciy denying the traffic

Packet captures are session/flow based, so having a single filter is enough for capturing both inbound and outbound traffic.

Four packet capture filters can be added with a variety of attributes.

Click File > Save and now you can email the packet capture file.Packet capture is very useful when you troubleshoot network connectivity issues or monitor suspicious activity.

When the unit has exhibited the behavior, click Stop.

You should begin to see data flowing in Wireshark. Click the Ethernet connection you are using (for example, Local Area Connection) and click Start.

Back to Wireshark, on the upper left side you will see Capture.

Connect one Ethernet cable from your unit to a port on the hub.

Connect one Ethernet cable from your computer to a port on the hub.

Connect power to the hub and connect an Ethernet cable from the hub to a live port.

Once you have a hub on hand and Wireshark installed, these are the directions that you'll need to follow to obtain the capture we need for troubleshooting.

Wireshark or some other packet capture software.

Ethernet Cable - You will need at least 1 or 2 additional cables.

A switch or router will not work because it doesn't broadcast the traffic to every port like a hub would.

Hub - You need to have a plain simple hub for this test. The reason this works is because the hub will allow a broadcast of traffic going in and out of the hub.

This process will require that you have some basic tools on hand to perform this task: Use a hub and Wireshark (instructions below). This is commonly performed as a troubleshooting step to give the technician more information on what could be happening.ģ. Occasionally our Technical Assistance Center (TAC) might ask you for a packet capture.