User guide

Using Diagnostic Tools
Chapter 17: Maintenance 349
Table 85: Packet Sniffer Fields
In this field… Do this…
Interface Select the interface from which to collect packets.
The list includes the primary Internet connection, the ZoneAlarm router
ports, and all defined networks.
Filter String Type the filter string to use for filtering the captured packets. Only
packets that match the filter condition will be saved.
For a list of basic filter strings elements, see Filter String Syntax on
page
350.
For detailed information on filter syntax, go to
http://www.tcpdump.org/tcpdump_man.html.
Note: Do not enclose the filter string in quotation marks.
If you do not specify a filter string, Packet Sniffer will save all packets on
the selected interface.
Capture only traffic
to/from this gateway
Select this option to capture incoming and outgoing packets for this
gateway only.
If this option is not selected, Packet Sniffer will collect packets for all
traffic on the interface.