Hi: My client can’t access this site http://www.szsfzx.cn by my 3.1 squid proxy (with ad auth) . throw error message: (104) Connection reset by peer The site can access by other proxy (2.6 squid proxy without auth) The config file and log below, any advice? 3.1 squid proxy config: acl manager proto cache_object acl localhost src 127.0.0.1/32 ::1 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 acl localnet src 10.0.0.0/8 # RFC1918 possible internal network acl localnet src 172.16.0.0/12 # RFC1918 possible internal network acl localnet src 192.168.0.0/16 # RFC1918 possible internal network acl localnet src fc00::/7 # RFC 4193 local private network range acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machine s acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT http_access allow manager localhost http_port 3128 hierarchy_stoplist cgi-bin ? cache_dir ufs /var/squidcache/cache/squid 4096 16 256 cache_mem 1024 MB coredump_dir /var/squidcache/cache/squid access_log /var/squidcache/log/access.log squid cache_log /var/squidcache/log/cache.log cache_store_log /var/squidcache/log/store.log refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 50 auth_param ntlm keep_alive on auth_param basic program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-basic auth_param basic children 80 auth_param basic realm Squid proxy-caching web server auth_param basic credentialsttl 5 hours auth_param basic casesensitive off acl ntlm_users proxy_auth REQUIRED http_access allow ntlm_users http_access deny all cache_mgr hyj@xxxxxxxxxxxxxxx visible_hostname squid01.gwdomain.com.cn cache_effective_user squid dns_nameservers 202.96.128.143 192.168.0.20 8.8.8.8 2.6 squid config file: acl all src 0.0.0.0/0.0.0.0 acl manager proto cache_object acl localhost src 127.0.0.1/255.255.255.255 acl to_localhost dst 127.0.0.0/8 acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT http_access allow manager localhost http_access deny manager http_access deny !Safe_ports http_access allow localhost http_access allow all icp_access allow all http_port 3128 hierarchy_stoplist cgi-bin ? access_log /var/log/squid/access.log squid acl QUERY urlpath_regex cgi-bin \? cache deny QUERY refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern . 0 20% 4320 acl apache rep_header Server ^Apache broken_vary_encoding allow apache visible_hostname bfcproxy coredump_dir /var/spool/squid 3.1 squid access log below: 1363076690.358 2675 192.168.18.12 TCP_MISS/000 0 GET http://www.szsfzx.cn/ heyijun DIRECT/114.215.16.16 - 1363076693.840 0 192.168.18.12 TCP_DENIED/407 4229 GET http://www.szsfzx.cn/ - NONE/- text/html 1363076693.846 0 192.168.18.12 TCP_DENIED/407 4438 GET http://www.szsfzx.cn/ - NONE/- text/html 1363076751.240 57378 192.168.18.12 TCP_MISS/000 0 GET http://www.szsfzx.cn/ heyijun DIRECT/114.215.16.16 - 1363076751.263 0 192.168.18.12 TCP_DENIED/407 4229 GET http://www.szsfzx.cn/ - NONE/- text/html 1363076751.270 0 192.168.18.12 TCP_DENIED/407 4438 GET http://www.szsfzx.cn/ - NONE/- text/html 1363077089.653 338372 192.168.18.12 TCP_MISS/000 0 GET http://www.szsfzx.cn/ heyijun DIRECT/114.215.16.16 - 1363077094.362 0 192.168.18.12 TCP_DENIED/407 4229 GET http://www.szsfzx.cn/ - NONE/- text/html 1363077094.367 0 192.168.18.12 TCP_DENIED/407 4438 GET http://www.szsfzx.cn/ - NONE/- text/html 1363077121.472 27088 192.168.18.12 TCP_MISS/000 0 GET http://www.szsfzx.cn/ heyijun DIRECT/114.215.16.16 - 1363077669.149 378156 192.168.18.12 TCP_MISS/502 4098 GET http://www.szsfzx.cn/ heyijun DIRECT/114.215.16.16 text/html 1363077801.051 97235 192.168.18.12 TCP_MISS/000 0 GET http://www.szsfzx.cn/ heyijun DIRECT/114.215.16.16 - 1363077802.995 0 192.168.18.12 TCP_DENIED/407 4104 GET http://www.szsfzx.cn/ - NONE/- text/html 1363077803.009 0 192.168.18.12 TCP_DENIED/407 4313 GET http://www.szsfzx.cn/ - NONE/- text/html