Hallo, zozo, Du meintest am 19.03.12: > userdemo@ubuntu-demo:~$ sudo cat /var/log/syslog |tail > Mar 19 16:01:01 ubuntu-demo (squid-1): Unable to open HTTP Socket > Mar 19 16:01:01 ubuntu-demo squid[1173]: Squid Parent: (squid-1) > process 1193 exited with status 1 Please try to start "squid" again, wait 1 to 2 minutes and then examine the log file(s) again with sudo tail -20 /var/log/syslog or sudo grep 'squid' /var/log/syslog May be the last ten lines of "/var/log/syslog" don't show the reason. But "Unable to open HTTP Socket" may point to the error. Viele Gruesse! Helmut