Ipsumdump is the first standalone program to use the Click modular router. (You do not need Click to compile ipsumdump.) The ipsumdump program simply constructs a Click configuration based on options provided by the user, then runs that configuration. All packet-related tasks, such as reading and writing tcpdump and ipsumdump files, sampling, filtering, and anonymization, are handled by Click elements designed for the purpose. Most of those elements existed already and required only modest changes, which made ipsumdump pretty easy to write. The elements we wrote from scratch have been fed back into Click, making them available to other projects. For example, if you'd like to read an ipsumdump file and synthesize packets with the same characteristics, use the FromIPSummaryDump element.