icmps de redireccion constantes al router desde la ip 2.152.234.1 t el puerto 0

Es tu puerta de enlace, imagino

A mí también me suele ocurrir, pero no todos los días:

[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Saturday, Apr 14,2012 18:03:39
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Saturday, Apr 14,2012 17:01:09
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Saturday, Apr 14,2012 16:57:23
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Saturday, Apr 14,2012 16:35:24
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Saturday, Apr 14,2012 15:43:51
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Saturday, Apr 14,2012 15:43:06
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Saturday, Apr 14,2012 15:40:00

[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Friday, Apr 13,2012 17:46:35
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Friday, Apr 13,2012 17:46:05
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Friday, Apr 13,2012 17:45:17
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Friday, Apr 13,2012 17:44:50
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Friday, Apr 13,2012 17:42:05
[DoS attack: Smurf] attack packets in last 20 sec from ip [2.154.50.1], Friday, Apr 13,2012 17:20:35

inetnum:2.154.0.0 - 2.154.255.255
netname:        ONO
descr:          ONO_NGTV
country:        ES
admin-c:OIM1-RIPE
tech-c:OIM1-RIPE
status:         ASSIGNED PA
mnt-by:ONO-MNT
source:         RIPE #Filtered

role:ONO IP MANAGER
address:        C/ Basauri, 5
address:        Urbanizacion La Florida
address:        E-28023 Aravaca, Madrid
address:        SPAIN
phone:          +34911809300
fax-no:         +34911809245
admin-c:OIM1-RIPE
tech-c:OIM1-RIPE
nic-hdl:OIM1-RIPE
mnt-by:ONO-MNT
source:         RIPE #Filtered