Squid 3.0 stable 18 # FD PID # Requests # Deferred Requests Flags Time Offset Request 1 58 31375 186 0 R 0.000 0 (none) 2 59 31376 59 0 R 0.001 0 (none) 3 60 31377 13 0 R 0.000 0 (none) 4 61 31379 16 0 R 0.001 0 (none) 5 62 31380 9 0 R 0.001 0 (none) 6 63 31381 86 0 R 0.001 0 (none) 7 64 31382 8 0 R 0.000 0 (none) 8 65 31383 1 0 R 0.002 0 (none) 9 66 31384 1 0 R 0.003 0 (none) 10 67 31385 38 0 R 0.001 0 (none) And crash squid.... On squid 2.7 stable 7 and olders this config work is fine auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 60 auth_param ntlm keep_alive on (off try too) external_acl_type nt_group ttl=200 children=30 %LOGIN /usr/local/squid_3_0_st18/libexec/wbinfo_group.pl acl users src 10.0.0.0/255.255.0.0 acl work_time time MTWHF 00:00-23:59 acl sg_squid_access external nt_group inetusers_standart http_access allow work_time sg_squid_access users