Pre-requisitos 
GDBM (http://www.gnu.org/software/gdbm/gdbm.html): 
./configure --prefix=/usr 
make 
make install 

GD (www.boutell.com/gd): 
./configure --prefix=/usr 
make 
make check 
make install 

LIBPNG (http://www.libpng.org/pub/png/libpng.html) 
cp scripts/makefile.linux makefile 
editar makefile e mudar prefix para /usr 
make test 
make install 

NTOP: 
./configure --prefix=/usr/ntop --without-ssl 
make (ultimo executado) 
make install 
make install-data-as 
Criar conta ntop com shell /dev/null 
chown -R ntop:users /usr/ntop/share/ntop 
Inicializar ntop (1strun) com /usr/ntop/bin/ntop -P /usr/ntop/share/ntop -u ntop -A e definir a senha de admin. 
Startar ntop com /usr/ntop/bin/ntop -P /usr/ntop/share/ntop -u ntop &