![]() The capture uses a low level of verbosity (indicated by 1). The following example captures packets traffic on TCP port 80 (typically HTTP) between two hosts, 192.168.0.1 and 192.168.0.2. Because port 22 is used (highlighted above in bold), which is the standard port number for SSH, the packets might be from an SSH session. If you are familiar with the TCP protocol, you may notice that the packets are from the middle of a TCP connection. The capture uses a low level of verbosity (indicated by 1).Ĭommands that you would type are highlighted in bold responses from the Fortinet unit are not in bold.įortiAnalyzer# diag sniffer packet port1 none 1 3Ġ.918957 192.168.1 -> 192.168.0.2. The following example captures the first three packets’ worth of traffic, of any port number or protocol and between any source and destination (a filter of none), that passes through the network interface named port1. otherwise: relative to the start of sniffing, ss.ms. ![]() l: absolute LOCAL time, yyyy-mm-dd hh:mm:ss.ms.a: absolute UTC time, yyyy-mm-dd hh:mm:ss.ms.If you do not specify a number, the command will continue to capture packets until you press Control + C. Type the number of packets to capture before stopping. 6: print header and data from ethernet of packets (if available) with intf nameįor troubleshooting purposes, Fortinet Technical Support may request the most verbose level ( 3).5: print header and data from ip of packets with interface name.4: print header of packets with interface name.3: print header and data from ethernet of packets (if available).2: print header and data from ip of packets.Type one of the following numbers indicating the depth of packet headers and payloads to capture: 'udp and port 1812 and src host 1. and dst \( 2. or 2. \)' ![]() To display only forward or only reply packets, indicate which host is the source, and which is the destination.įor example, to display UDP port 1812 traffic between 1. and either 2. or 3., you would enter: To display only the traffic between two hosts, specify the IP addresses of both hosts. Type either none to capture all packets, or type a filter that specifies which protocols and port numbers that you do or do not want to capture, such as 'tcp port 25'. Type the name of a network interface whose packets you want to capture, such as port1, or type any to capture packets on all network interfaces. To minimize the performance impact on your FortiAnalyzer unit, use packet capture only during periods of minimal traffic, with a serial console CLI connection rather than a Telnet or SSH CLI connection, and be sure to stop the command when you are finished. Packet capture can be very resource intensive. Packet capture output is printed to your CLI display until you stop it by pressing CTRL + C, or until it reaches the number of packets that you have specified to capture. Packet capture is displayed on the CLI, which you may be able to save to a file for later analysis, depending on your CLI client. ![]() Packet capture on FortiAnalyzer units is similar to that of FortiGate units. By recording packets, you can trace connection states to the exact point at which they fail, which may help you to diagnose some types of problems that are otherwise difficult to detect.įortiAnalyzer units have a built-in sniffer. Packet capture, also known as sniffing, records some or all of the packets seen by a network interface. Use this command to perform a packet trace on one or more network interfaces.
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