D-Link DFL-1660 User Manual page 83

2.5. The pcapdump Command
Output File Naming Restrictions
The name of the file used for pcapdump output must comply with the following rules:
• Excluding the filename extension, the name may not exceed 8 characters in length.
• The filename extension cannot exceed 3 characters in length.
• The filename and extension can only contain the characters A-Z, 0-9, "-" and "_".
Combining Filters
It is possible to use several of these filter expressions together in order to further refine the packets
that are of interest. For example we might want to examine the packets going to a particular
destination port at a particular destination IP address.
Compatibility with Wireshark
The open source tool Wireshark (formerly called Ethereal) is an extremely useful analysis tool for
examining logs of captured packets. The industry standard .pcap file format used by pcapdump with
its -write option means that it is compatible with Wireshark.
For more complete information about this topic, see http://www.wireshark.org.
Chapter 2. Management and Maintenance
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