UNHIDE-TCP(8)               System Manager's Manual              UNHIDE-TCP(8)

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

SYNOPSIS
       unhide-tcp [options]

DESCRIPTION
       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.

OPTIONS
       -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.

   Exit status:
       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.

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

SEE ALSO
       unhide (8).

AUTHOR
       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.

LICENSE
       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            June 2022                     UNHIDE-TCP(8)