On the working 2.7 stable 4 - Work in fine, install new squid 3.0 stable 13 - get older config And squid it began to be restarted often on error "All ntlmauthenticator processes are busy" Cachemgr.cgi: # FD PID # Requests # Deferred Requests Flags Time Offset Request 1 58 9801 2608 0 R 0.000 0 (none) 2 59 9802 343 0 R 0.000 0 (none) 3 60 9803 167 0 R 0.000 0 (none) 4 61 9804 79 0 R 0.000 0 (none) 5 62 9805 49 0 R 0.000 0 (none) 6 63 9806 23 0 R 0.000 0 (none) 7 64 9807 662 0 R 0.000 0 (none) 8 65 9808 193 0 R 0.000 0 (none) 9 66 9809 62 0 R 0.000 0 (none) 10 67 9810 29 0 R 0.000 0 (none) 11 68 9811 17 0 R 0.000 0 (none) 12 69 9812 7 0 R 0.001 0 (none) 13 70 9813 910 0 R 0.000 0 (none) 14 71 9814 327 0 R 0.000 0 (none) All ntlm connectors status is RESERVED / Deferred All basics work in fine Squid restart 1-3 hours in day or night 4-5 hours Of use squid -k reconfigure Cachemgr.cgi: # FD PID # Requests # Deferred Requests Flags Time Offset Request 1 58 9801 2608 0 RS 0.000 0 (none) 2 59 9802 343 0 RS 0.000 0 (none) 3 60 9803 167 0 RS 0.000 0 (none) 4 61 9804 79 0 RS 0.000 0 (none) 5 62 9805 49 0 RS 0.000 0 (none) 6 63 9806 23 0 RS 0.000 0 (none) 7 64 9807 662 0 RS 0.000 0 (none) 8 65 9808 193 0 RS 0.000 0 (none) 9 66 9809 62 0 RS 0.000 0 (none) 1 90 9810 290 0 R 0.000 0 (none) 2 91 9811 1700 0 0.000 0 (none) 3 92 9812 75 0 R 0.000 0 (none) 4 93 9813 2800 0 R 0.000 0 (none) 5 94 9814 327 0 0.000 0 (none) And "RS" status Remains until squid -k shutdown Squid configured on external_acl_type nt_group ttl=200 children=30 %LOGIN /usr/local/squid/libexec/wbinfo_group.pl auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 80 auth_param ntlm keep_alive off auth_param basic program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-basic #auth_param basic children 10 auth_param basic children 20 auth_param basic realm Squid proxy-caching web server auth_param basic credentialsttl 2 hours P.S install Other version 3.0 stable 7 - error again 2.7 stable 6 - work in fine