Hi all, Running CentOS 4.2 with the following conditions: [root at gatekeeper bin]# uname -srvmpi Linux 2.6.9-22.0.1.EL #1 Thu Oct 27 12:26:11 CDT 2005 i686 i686 i386 [root at gatekeeper bin]# uptime 07:54:41 up 31 days, 13:45, 6 users, load average: 0.00, 0.02, 0.00 [root at gatekeeper bin]# rpm -q ntop ntop-3.1-1.2.el4.rf [root at gatekeeper bin]# df -h S.ficheros Tamaño Usado Disp Uso% Montado en /dev/mapper/VolGroup00-LogVol00 2,9G 2,4G 425M 85% / /dev/hda1 99M 16M 79M 17% /boot none 157M 0 157M 0% /dev/shm [root at gatekeeper bin]# free total used free shared buffers cached Mem: 321044 312068 8976 0 44984 98648 -/+ buffers/cache: 168436 152608 Swap: 655352 480 654872 [root at gatekeeper bin]# vmstat procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 480 8976 44992 98676 0 0 3 4 8 5 6 2 90 1 I've found the following error in syslog: ============================================================================ Mar 3 21:54:07 gatekeeper ntop[4711]: **ERROR** Queue of address '???' failed, code -1 [addr queue=4096/max=4097] Mar 3 21:54:07 gatekeeper ntop[4711]: ntop processing continues, address will not be resolved ============================================================================ TIA Jose.