thank you for the answer
it's an hold dell desktop
I don't configure it. ipcop was set up before I came into the factory.
I don't know this firewall.. and I'm beginner in linux.
I noticed that when I restart ipcop free disk space decreases in /dev/hda1.
after a few times the disk space becomes normal again.
I make a df :
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 1037408 68 1037340 1% /dev
/dev/hda1 773040 402548 331224 55% /
/dev/hda2 37672480 436052 35322780 2% /var/log
tmpfs 1037408 0 1037408 0% /tmp
shm 1037408 0 1037408 0% /dev/shm
the first time I reboot it by command line because the internet was broken.
First I delete some old log files to make some space. and I rebbot after.
I noticed during the reboot I have one alert :
Hostname : Host name lookup failure
Certificate issuer 'ipcop.localdomain' is not the same as the hostname ''
probably host or domain name has been changed in setup.
you could remake server certificate with '.usr/local/bin/httpscert new'
do you think there is a link