Hi Issn ,
You can use the below to capture traffic on your firewall
undebug all
clear db
set console dbuf
snoop detail ~~~~~~~~~only available for root (netscreen by default)
snoop detail len 1514
snoop filter ip src-ip X.X.X.X dst-ip Y.Y.Y.Y
snoop ~~~~~then initiate the traffic & wait few seconds
Stop the capture with <ESC> to stop the snoop
display the output with the command "get dbuf stream".
You can save the output directly to a tftp-server with the command
"get dbuf stream > tftp <host> <filename>"
You can read that file using WireShark
But if your target is only to see the traffic flow :
undebug all
clear debug
set ff src-ip X.X.X.X dst-ip Y.Y.Y.Y
Debug flow basic , then initiate the traffic & wait few seconds
press ESc ~~~~~to stop the debug
get db st to see the debug output