The Packet Capture Files Screen - ZyXEL Communications ZYWALL USG 20 Manual

Chapter 46 Diagnostics
Table 221 Maintenance > Diagnostics > Packet Capture (continued)
LABEL
Number Of Bytes To
Capture (Per Packet)
Capture
Stop
Reset

46.3.1 The Packet Capture Files Screen

Click Maintenance > Diagnostics > Packet Capture > Files to open the
packet capture files screen. This screen lists the files of packet captures stored on
the ZyWALL or a connected USB storage device. You can download the files to
your computer where you can study them using a packet analyzer (also known as
a network or protocol analyzer) such as Wireshark.
Figure 430 Maintenance > Diagnostics > Packet Capture > Files
710
DESCRIPTION
Specify the maximum number of bytes to capture per packet. The
ZyWALL automatically truncates packets that exceed this size. As a
result, when you view the packet capture files in a packet analyzer,
the actual size of the packets may be larger than the size of
captured packets.
Click this button to have the ZyWALL capture packets according to
the settings configured in this screen.
You can configure the ZyWALL while a packet capture is in progress
although you cannot modify the packet capture settings.
The ZyWALL's throughput or performance may be affected while a
packet capture is in progress.
After the ZyWALL finishes the capture it saves a separate capture
file for each selected interface. The total number of packet capture
files that you can save depends on the file sizes and the available
flash storage space. Once the flash storage space is full, adding
more packet captures will fail.
Click this button to stop a currently running packet capture and
generate a separate capture file for each selected interface.
Click this button to return the screen to its last-saved settings.
ZyWALL USG 20/20W User's Guide