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IPF(8)                                                                  IPF(8)

       ipf - alters packet filtering lists for IP packet input and output

       ipf [ -6AdDEInoPrsUvVyzZ ] [ -l <block|pass|nomatch> ] [ -F <i|o|a|s|S>
       ] -f <filename> [ -f <filename> [...]]

       ipf opens the filenames listed (treating "-" as stdin) and  parses  the
       file  for  a  set  of  rules  which are to be added or removed from the
       packet filter rule set.

       Each rule processed by ipf is added to the kernel's internal  lists  if
       there  are  no  parsing  problems.   Rules  are added to the end of the
       internal lists, matching the order in which they appear when  given  to

       -6     This  option  is  required  to parse IPv6 rules and to have them

       -A     Set the list to make changes to the active list (default).

       -d     Turn debug mode on.  Causes a hexdump of filter rules to be gen-
              erated as it processes each one.

       -D     Disable  the  filter  (if  enabled).  Not effective for loadable
              kernel versions.

       -E     Enable the filter (if disabled).   Not  effective  for  loadable
              kernel versions.

       -F <i|o|a>
              This option specifies which filter list to flush.  The parameter
              should either be "i" (input), "o" (output) or  "a"  (remove  all
              filter  rules).  Either a single letter or an entire word start-
              ing with the appropriate letter maybe used.  This  option  maybe
              before,  or  after, any other with the order on the command line
              being that used to execute options.

       -F <s|S>
              To flush entries from the state table, the -F option is used  in
              conjunction with either "s" (removes state information about any
              non-fully established connections) or "S"  (deletes  the  entire
              state  table).   Only  one  of  the two options may be given.  A
              fully established connection will show up in ipfstat  -s  output
              as  4/4,  with  deviations either way indicating it is not fully
              established any more.

       -f <filename>
              This option specifies which files ipf should use  to  get  input
              from for modifying the packet filter rule lists.

       -I     Set the list to make changes to the inactive list.

       -l  <pass|block|nomatch>
              Use  of  the  -l flag toggles default logging of packets.  Valid
              arguments to this option are pass, block and nomatch.   When  an
              option  is set, any packet which exits filtering and matches the
              set category is logged.  This is most  useful  for  causing  all
              packets  which don't match any of the loaded rules to be logged.

       -n     This flag (no-change) prevents  ipf  from  actually  making  any
              ioctl  calls  or  doing anything which would alter the currently
              running kernel.

       -o     Force rules by default to be added/deleted  to/from  the  output
              list, rather than the (default) input list.

       -P     Add rules as temporary entries in the authentication rule table.

       -r     Remove matching filter rules rather than add them to the  inter-
              nal lists

       -s     Swap the active filter list in use to be the "other" one.

       -U     (SOLARIS  2 ONLY) Block packets travelling along the data stream
              which aren't recognised as IP packets.  They will be printed out
              on the console.

       -v     Turn  verbose  mode  on.   Displays information relating to rule

       -V     Show version information.  This will display the version  infor-
              mation  compiled  into  the  ipf binary and retrieve it from the
              kernel code (if running/present).  If it is present in the  ker-
              nel,  information  about  its  current  state  will be displayed
              (whether logging is active, default filtering, etc).

       -y     Manually resync the in-kernel interface list  maintained  by  IP
              Filter with the current interface status list.

       -z     For  each rule in the input file, reset the statistics for it to
              zero and display the statistics prior to them being zero'd.

       -Z     Zero global statistics held in the  kernel  for  filtering  only
              (this doesn't affect fragment or state statistics).


       ipftest(1), mkfilters(1), ipf(4), ipl(4), ipf(5), ipfstat(8), ipmon(8),

       Needs to be run as root for the packet filtering lists to  actually  be
       affected inside the kernel.

       If you find any, please send email to me at



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