start capture grayed out wireshark ubuntu 16.04

#Start capture grayed out wireshark ubuntu 16.04 how to
#Start capture grayed out wireshark ubuntu 16.04 full
#Start capture grayed out wireshark ubuntu 16.04 registration

Or you may want to deploy a new FMC and add your sensor to it? Then you may go to the FTD CLI and execute >configure manager delete If you miss to delete the sensor you may hit problems while adding it again.ĭevices->Device management -> trash bin icon of the sensor It is highly recommended to delete a sensor from the FMC if you want to reimage it and add it again to the FMC. Once the FMC is configured to expect a new communication on port 8305, you can see the socket is netstat -an |grep 8305

#Start capture grayed out wireshark ubuntu 16.04 registration

To be sure that the registration process between the FMC and the sensor is established you may use basic Linux commands:Ĭisco Firepower Management Center for VMWare v6.2.2 (build netstat -an | grep you see no output, it means the FMC does not communicate with sensors and it is not even attempting to communicate. This box communicates with its networks sensors (FTD, SFR, Firepower) through port 8305. Frankly it is being called Cisco Fire Linux OS.

#Start capture grayed out wireshark ubuntu 16.04 how to

How to check if FMC management port 8305 is open?įirepower Management Center is a linux appliance by its nature. Now there are no Reset TCP flags and the registration is done.įigure 7 Registration to FMC is completedĤ. On screenshot of the FTD console we can see that 192.168.0.200 initialized the connection to 1.1.1.11 on port 8305. In my lab, I will use ASAv to translate FTD management IP. You must also define a ACL to permit the traffic.įigure 6 – Error saying “ Could not establish a connection with the sensor“. If there is not a Static NAT record on the device in between, it is normal to see the following message. Then show managers – shows UUID instead of IP address.įTD>configure manager add DONTRESOLVE CiscoKEY CiscoNATID If the NAT ID is the same, then FTD accepts the request. The FTD receives the SYN but does not compare the IP with its configuration manager, but it compares the NAT ID. The FMC sends request which is NATed by an edge device (static NAT is required). Now you can see your sensor added to the FMC.ģ.

Packet #3 SYN to 8305 originating from the FMC. We see that the Firepower Management Center initializes the communication to the sensor. This time I will capture the traffic on a pcap file and I will follow the communication on Wireshark. On the backplane I will sniff the connection again. It should be the same on the both devices. Go to Devices -> Device management -> addĮnter the sensor details and click on register.

#Start capture grayed out wireshark ubuntu 16.04 full

Tcpdump: verbose output suppressed, use -v or -vv for full protocol decode Please make note of reg_key as this will be required while adding Device in FMC. To follow the registration process I will capture the traffic between these two devices.Ĭonfigure manager add 192.168.0.200 CiscoKEY High level diagrams of the communicationĢ.Sensor and Firepower Management Center configuration In order to make troubleshooting easier there will be dedicated troubleshooting post later on. I will also give you some additional hints what to check to verify the registration. This post should help you to understand the Firepower sensor registration in Firepower Management Center process and uncover the communication specifics between firepower components.