flow-mask(1) flow-mask(1)
NAME
flow-mask — Apply tags to flow files.
SYNOPSIS
flow-mask [-hk] [-b big|little] [-C comment] [-d debug_level] [-m
mask_fname] [-M active_def ...]
DESCRIPTION
The flow-mask utility is used to modify the source and destination mask
length’s in flow records.
OPTIONS
-b big|little
Byte order of output.
-C Comment
Add a comment.
-d debug_level
Enable debugging.
-h Display help.
-k Keep time from input.
-m mask_fname
Load masks from mask_name. Defaults to /etc/flow-
tools/cfg/mask
-M mask_def
Use active_def as the active tag definition(s).
The configuration file is a collection of definitions. A definition
lists a sequence of prefixes and the mask length to replace the
matching prefix with. Lines begining with # are treated as comments
and ignored.
mask-definition command Description
----------------------------------------------------------------------
mask-definition Begin mask-definition section
mask-definition foo
prefix List the prefix to match on and the
replacement mask.
prefix 128.146/16 24
EXAMPLES
#
#file: masks
#
mask-definition foo
# All networks in 128.146/16 are /24’s.
prefix 128.146/16 24
# except for 128.146.214/24, which are /32’s.
prefix 128.146.214/24 32
flow-cat flows | flow-mask -mfoo -Fmasks | flow-print -f4
FILES
Configuration files:
Mask - /etc/flow-tools/cfg/mask.cfg.
BUGS
None known.
AUTHOR
Mark Fullmer maf@splintered.net
SEE ALSO
flow-tools(1)
flow-mask(1)