In the above example, I am looking for ONLY ICMP traffic. ICMP (Identifying Ping)ĭiag sniffer packet any "icmp" 4 l 0 ICMP Specifying Host IP Now we are going to add some options so we can see how those command look. Here are the verbosity level 1: print header of packetsĢ: print header and data from ip of packetsģ: print header and data from ethernet of packets (if available)Ĥ: 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 (if available) with intf name Examples with Options Timestamp - the format of the timestamps on the capture Verbosity level - how much information you are collecting ( 1-6 See below)Ĭount - the number of packets you want to capture ( 0 = Unlimited) Options - here you can filter the capture by IP, protocol, etc. Interface - You can either choose the interface specifically or use the keyword any Lets break this down: diagnose sniffer packet - this is the base command You can right click and choose Edit in CLI Sniffer Command The other option is to go through the GUI and choose the Policy you want to disable offload on. In my example, I will edit Policy ID 2 LAB-601E # config firewall policyĪs you can see the options are enable or disable When you are running a capture and are not seeing what you are expecting to see, you may need to disable the offloading on that particular policy. So the first thing to note is that since FortiGate is such and amazing platform ( I know I am biased) and has the advent of ASICs, by default, we do not see the packets that are getting offloaded to the SOC and NOC ASICs. Once they get the information, I usually do not hear from them again and things just “start working”. ![]() Most of the time I spend “Troubleshooting” it is usually collecting packet captures, debug output, etc to send to the people blaming me for the problem. So to me, if you cannot do a packet capture, you are at a huge disadvantage. ![]() I have been in the networking and security industry for about 29 years as of this writing and I have always lived my a strict motto and anyone that has worked with me in the past knows this well. In this “Not-So” Quick-Tip, I am going to cover diag sniffer packet . Usually they are quick easy commands to make your day brighter and help you finish up quicker so you can enjoy family, friends, and libations. Quick-Tips are short how to’s to help you out in day-to-day activities. Quick-Tip : How To Run Sniffer on FortiGate CLI
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