I would like to know if there is not Fortigates an equivalent of the packet-tracer command that we can find on the ASA.

Here is an example of execution for those who don't know it:

NAT and pass :

lev5505# packet-tracer input inside tcp 192.168.3.20 9876 8.8.8.8 80

Phase: 1
Type: ACCESS-LIST
Subtype: 
Result: ALLOW
Config:
Implicit Rule
Additional Information:
MAC Access list

Phase: 2
Type: ROUTE-LOOKUP
Subtype: input
Result: ALLOW
Config:
Additional Information:
in   0.0.0.0         0.0.0.0         outside

Phase: 3
Type: ACCESS-LIST
Subtype: log
Result: ALLOW
Config:
access-group inside-in in interface inside
access-list inside-in extended permit tcp any any eq www 
access-list inside-in remark Allows DNS
Additional Information:

Phase: 4
Type: IP-OPTIONS
Subtype: 
Result: ALLOW
Config:
Additional Information:

Phase: 5
Type: VPN
Subtype: ipsec-tunnel-flow
Result: ALLOW
Config:
Additional Information:

Phase: 6
Type: NAT
Subtype: 
Result: ALLOW
Config:
object network inside-network
 nat (inside,outside) dynamic interface
Additional Information:
Dynamic translate 192.168.3.20/9876 to 81.56.15.183/9876

Phase: 7
Type: IP-OPTIONS
Subtype: 
Result: ALLOW
Config:
Additional Information:

Phase: 8
Type: FLOW-CREATION
Subtype: 
Result: ALLOW
Config:
Additional Information:
New flow created with id 94755, packet dispatched to next module

Result:
input-interface: inside
input-status: up
input-line-status: up
output-interface: outside
output-status: up
output-line-status: up
Action: allow

Blocked by ACL:

lev5505# packet-tracer input inside tcp 192.168.3.20 9876 8.8.8.8 81

Phase: 1
Type: ROUTE-LOOKUP
Subtype: input
Result: ALLOW
Config:
Additional Information:
in   0.0.0.0         0.0.0.0         outside

Phase: 2
Type: ACCESS-LIST
Subtype: 
Result: DROP
Config:
Implicit Rule
Additional Information:

Result:
input-interface: inside
input-status: up
input-line-status: up
output-interface: outside
output-status: up
output-line-status: up
Action: drop
Drop-reason: (acl-drop) Flow is denied by configured rule

Is there any equivalent on the Fortigates ?

On the Fortigate you actually don't have command with capability to generate a dummy packet like on your cisco ASA. But the closest utility will be "diagnose debug flow" commands. The difference is that, with fortigate you need real traffic traversing through the firewall.

Below are the complete commands that you need to execute:

diagnose debug reset
diagnose debug flow filter addr <source OR destination IP address>
diagnose debug flow show console enable
diagnose debug flow show function enable
diagnose debug flow trace start <number of entries you want to view. e.g. 100>
diagnose debug enable

I do beleive the closest thing you will find to that on Fortinet devices is the sniffer utility (can be accessed with: diagnose sniffer ?) I forget the exact options after this point but it should be what you're looking for.

  • I know this is really late but posted in case anyone else is looking for the same info. – Rob Jun 20 '12 at 3:05

It is name "diagnose debug flow trace" on fortigate

https://blog.webernetz.net/2015/12/21/cli-commands-for-troubleshooting-fortigate-firewalls/

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