Hello everyone, sometimes my squid process go to down and quickly to up again.maybe less of 3 seconds. in the logs ( /var/log/messages ) appear follow message: Jun 27 07:23:11 jvelnxfw02 squid[25247]: Too many queued ntlmauthenticator requests (26 on 5) Jun 27 07:23:11 jvelnxfw02 squid[25245]: Squid Parent: child process 25247 exited due to signal 6 Jun 27 07:23:14 jvelnxfw02 squid[25245]: Squid Parent: child process 26127 started I'm using the Active Directory to authentication. follow my squid parameters about ntlm auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param basic children 20 auth_param basic realm Acesso a Internet Tigre SA auth_param basic credentialsttl 2 hours authenticate_cache_garbage_interval 10 seconds authenticate_ttl 0 seconds external_acl_type NT_global_group children=10 %LOGIN /usr/lib64/squid/squid_unix_group acl ntlm_users proxy_auth REQUIRED cache_store_log none request_entities on why the squid sometimes go to down and itself go to up again ?? my squid version is 2.6.STABLE21 on Red Hat Enterprise 5.6 any tip is welcome. thank!