flow-mask - Man Page

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