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flow-mask(1)		     General Commands Manual		    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 CommentAdd 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

FILES
       Configuration files:
	 Mask - /usr/local/etc/flow-tools/mask.cfg.

BUGS
     None known.

AUTHOR
     Mark Fullmer maf@splintered.net

SEE ALSO
     flow-tools(1)

								    flow-mask(1)

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