unhide-tcp — forensic tool to find hidden TCP/UDP ports

       This  manual  page  was  written   by   Francois   Marier   (francois@debian.org)   and   Patrick   Gouin
       (patrickg.github@free.fr).
       Permission  is granted to copy, distribute and/or modify this document under the terms of the GNU General
       Public License, Version 3 or any later version published by the Free Software Foundation.

       Report unhide-tcp bugs on the bug tracker on GitHub (https://github.com/YJesus/Unhide/issues)

unhide-tcp  is  a  forensic  tool  that identifies TCP/UDP ports that are listening but are not listed by
       /sbin/ss (or alternatively by /bin/netstat) through brute forcing of all TCP/UDP ports available.
       Note1 : On FreeBSD ans OpenBSD, netstat is always  used  as  iproute2  doesn't  exist  on  these  OS.  In
       addition,  on  FreeBSD,  sockstat  is used instead of fuser.  Note2 : If iproute2 is not available on the
       system, option -n or -s SHOULD be given on the command line.

       License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to  the  extent
       permitted by law.

Administration commands                             May 2024                                       UNHIDE-TCP(8)

       unhide-tcp — forensic tool to find hidden TCP/UDP ports

-h--help
              Display help

       --brief
              Don't display warning messages, that's the default behavior.

       -f--fuser
              Display fuser output (if available) for the hidden port On  FreeBSD,  instead  of  fuser  command,
              displays the output of the sockstat command for the hidden port.

       -l--lsof
              Display lsof output (if available) for the hidden port

       -n--netstat
              Use  /bin/netstat  instead  of  /sbin/ss. On system with many opened ports, this can slow down the
              test dramatically.

       -s--server
              Use a very quick strategy of scanning. On system with a lot of opened ports, it is hundreds  times
              faster than ss method and ten thousands times faster than netstat method.

       -o--log
              Write a log file (unhide-tcp-AAAA-MM-DD.log) in the current directory.

       -V--version
              Show version and exit

       -v--verbose
              Be  verbose,  display warning message (default : don't display).  This option may be repeated more
              than once.

   Exitstatus:
       0      if no hidden port is found,

       4      if one or more hidden TCP port(s) is(are) found,

       8      if one or more hidden UDP port(s) is(are) found,

       12     if one or more hidden TCP and UDP ports are found.

       unhide (8).

unhide-tcp[options]