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.