That's what I get in syslog. squid starts, then dies after a few seconds. Cache log doesn't show anything about exit reasons. 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 Mar 19 16:01:04 ubuntu-demo squid[1173]: Squid Parent: (squid-1) process 1198 started Mar 19 16:01:04 ubuntu-demo (squid-1): Unable to open HTTP Socket Mar 19 16:01:04 ubuntu-demo squid[1173]: Squid Parent: (squid-1) process 1198 exited with status 1 Mar 19 16:01:04 ubuntu-demo squid[1173]: Squid Parent: (squid-1) process 1198 will not be restarted due to repeated, frequent failures Mar 19 16:01:04 ubuntu-demo squid[1173]: Exiting due to repeated, frequent failures It's Ubuntu server 10.04. Squid version is 3.2.0.16 I had very same configuration on Ubuntu 11, and it worked. Please help me, where to look at in linux config or in squid config. Thank you, Igor