Use of absolute time stamp in sniffer trace will report the absolute system time (no time zone) in packet summary: A script is available (), which will convert a captured verbose 6 output, into a file that can be read and decoded by Ethereal/Wireshark. Verbose 6, finally, even includes Ethernet (Ether Frame) Information. Notice the in/ out parameter after internal interface that will confirm the direction of the packet entering or leaving the interface. The IP Header as we've already seen in Verbose 4
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If you're using Putty (a free SSH client for Windows) you can easily log all Output to a file which you can search/sort/process.ġ. Hint: For further investigation it's always a good idea to log to a file. If you don't enter a value, the Sniffer runs forever until you stop it with We can also see the corresponding TCP Sequence numbers. With information level set to Verbose 4, we see a summary of Source and Destination IP Address, as well as Source and Destination Port. Finally the session is acknowledged and established after the 3-way TCP handshake. 192.168.0.30 tries to connect to 192.168.0.1 on Port 80 with a syn and gets a syn ack back. > 192.168.0.1.80: ack 3792179543Īpparently we caught some more interesting information, just when a TCP session was being set up. Sniff 3 packets of all traffic with verbose Level 4 on Internal interface The "none" variable means 'no filter applies', "4" means 'verbose 4' and "3" means 'catch 3 packets and stop'. Because the 192.168.0.1 IP Address uses Port 22 (192.168.0.1.22) we can assume that we've caught some Packets from a running SSH Session. > 192.168.0.1.22: ack 2859918884Īs you can see we caught some Packets in the middle of a communication. Sniff 3 packets of all traffic with verbose Level 4 on internal Interface the number of packets the sniffer reads before stopping.Ī introduced in release 3.0 MR6, this setting allows display of absolute time stamp Example 1: Simple Trace is a very powerful filter functionality which will be described in more detail. means the level of verbosity as described already. can be an Interface name or "any" for all Interfaces. This article walks through some examples and different levels of verbosity to show the different possibilities for debugging. Verbose 4, 5 and 6 would additionally provide the interface detailsĢ: print header and data from IP of packetsģ: print header and data from Ethernet of packetsĤ: print header of packets with interface nameĥ: print header and data from IP of packets with interface nameĦ: print header and data from Ethernet of packets with interface name There are 3 different Level of Information, also known as Verbose Levels 1 to 3, where verbose 1 shows less information and verbose 3 shows the most information. The packet sniffer "sits" in the FortiGate and can sniff traffic on a specific Interface or on all Interfaces. Note : Other Fortinet appliances also providing a CLI sniffer : FortiAnalyzer - FortiMail - FortiManager See the related article "Packet capture (sniffer) tips" for additional sniffer tips. If you know tcpdump you should feel comfortable using the FortiGate Sniffer. All FortiGate units have a powerful packet sniffer on board.
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