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 /usr/local/etc/flow-tools/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

BUGS

None known.

AUTHOR

Mark Fullmer maf@splintered.net

SEE ALSO

flow-tools(1)