[LUG.ro] Intento de intrusión

[Desarrollo]

Hola a todos:

Nuevamente recurro a la lista con nuevos problemas. Recientemente he
instalado logwatch en un Debian que tengo para desarrollo y en los
reportes recibo todos los días mensajes como el siguiente:
 --------------------- httpd Begin ------------------------


 A total of 6 sites probed the server
   190.140.47.75
   190.219.48.171
   190.8.44.50
   200.35.162.193
   201.222.96.178
   41.153.221.193

 Requests with error response codes
   400 Bad Request
      null: 2 Time(s)
   401 Unauthorized
      /: 19 Time(s)
      //phpMyAdmin/: 1 Time(s)
      //phpmyadmin/: 1 Time(s)
      /PMA2005/scripts/setup.php: 1 Time(s)
      /admin/css/ventanas/alert.css: 2 Time(s)
      /admin/css/ventanas/ventanas_default.css: 2 Time(s)
      /admin/phpmyadmin/scripts/setup.php: 1 Time(s)
      /admin/pma/scripts/setup.php: 1 Time(s)
      /admin/scripts/setup.php: 1 Time(s)
      /php-my-admin/scripts/setup.php: 2 Time(s)
      /php-myadmin/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.2.3/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.2.6/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.4/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.5-pl1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.5-rc1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.5-rc2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.5/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.6-rc1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.6-rc2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.6/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.7-pl1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.5.7/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-alpha/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-alpha2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-beta1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-beta2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-pl1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-pl2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-pl3/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-rc1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-rc2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0-rc3/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.0/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.1-pl1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.1-pl2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.1-pl3/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.1-rc1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.1-rc2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.2-beta1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.2-pl1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.2-rc1/scripts/setup.php: 2 Time(s)
      /phpMyAdmin-2.6.2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.3-pl1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.3-rc1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.3/scripts/setup.php: 2 Time(s)
      /phpMyAdmin-2.6.4-pl1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.4-pl2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.4-pl3/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.4-pl4/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.4-rc1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.6.4/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.7.0-beta1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.7.0-pl1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.7.0-pl2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.7.0-rc1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.7.0/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.0-beta1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.0-rc1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.0-rc2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.0.1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.0.2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.0.3/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.0.4/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.0/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.1-rc1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.1/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2.8.2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin-2/scripts/setup.php: 1 Time(s)
      /phpMyAdmin/scripts/setup.php: 2 Time(s)
      /phpadmin/scripts/setup.php: 1 Time(s)
      /phpmanager/scripts/setup.php: 1 Time(s)
      /phpmy-admin/scripts/setup.php: 1 Time(s)
      /phpmyadmin/scripts/setup.php: 2 Time(s)
      /phpmyadmin1/scripts/setup.php: 1 Time(s)
      /phpmyadmin2/scripts/setup.php: 1 Time(s)

La lista continúa pero me parece que ya es más que evidente que algún
programa o alguien está intentando algo con mi servidor. Ya que no
conozco de temas relacionados con la seguridad, me gustaría que me
recomendaran alguna herramienta para protegerme de estos intentos, ya
que no sólo ponen en riesgo mi servidor sinó que además consumen ancho
de banda.
Saludos y gracias
Adrián