FLOWD(8) BSD System Manager's Manual FLOWD(8)NAMEflowd — NetFlow collector daemon
SYNOPSISflowd [-hdg] [-D macro=value] [-f config_file] command
DESCRIPTIONflowd is a small NetFlow collector daemon capable of understanding Cisco
NetFlow version 1, version 5 and version 9 packet formats. flowd sup‐
ports filtering and tagging of received flows before they are stored on
disk, using a filter syntax similar to the OpenBSD PF packet filter. The
on-disk format is flexible in that it allows selection of which packet
fields are recorded, so logs may be made very compact.
By default, flowd will obtain its configuration from the flowd.conf(5)
file, which typically resides in /usr/local/etc/flowd.conf. However, a
different configuration file may be specified on the commandline using
the -d option.
flowd may be terminated by sending it a SIGTERM signal. Upon receipt of
a SIGUSR1 flowd will close and reopen its logfile. This is useful for
rotating logs. When flowd receives a SIGHUP it will re-read its configu‐
ration and re-open its logfile. Some basic runtime statistics will be
logged when flowd is signalled with SIGUSR2 or SIGINFO.
The command-line options are as follows:
-D macro=value
defines the name macro, which can then be used later in the con‐
fig file. Refer to the MACROS section in flowd.conf(5) for more
information on the use of macros.
-d Places flowd in debugging mode. In this mode, flowd will not
fork to the background and will print verbose diagnostics,
including details of each flow received.
-g Causes flowd not to fork and background itself. Logging will be
reported to stderr instead of syslog.
-f config_file
Specify an alternate location for the configuration file Default
is /usr/local/etc/flowd.conf
-h Displays commandline usage information.
AUTHORS
Damien Miller <djm@mindrot.org>
SEE ALSOflowd-reader(8)flowd.conf(5)BSD July 30, 2004 BSD
