Hi, I am trying to implement 2 squid server with sibling and parent as mentioned below. Scenario INTERNET | | USER(a.a.a.a) ----->Squid 1(Sibling)(a.a.a.a) ----> Squid 2(Parent)(b.b.b)--> INTERNET Please find my squid configs Sibling Server http_port 8080 cache_peer squid1 parent 8080 0 no-query default originserver prefer_direct on #never_direct allow all hierarchy_stoplist cgi-bin ? acl QUERY urlpath_regex cgi-bin \? cache deny QUERY acl apache rep_header Server ^Apache broken_vary_encoding allow apache cache_mem 100 MB cache_swap_low 90 cache_swap_high 95 access_log /var/log/squid/access.log squid 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 acl Eng src a.a.a.a acl US src b.b.b.b http_access allow manager localhost http_access deny manager http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow localhost http_access allow Eng http_access allow US http_access deny all http_reply_access allow all icp_access allow all cache_effective_user squid cache_effective_group squid icp_port 0 always_direct deny all prefer_direct on coredump_dir /var/spool/squid refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern (cgi-bin|\?) 0 0% 0 refresh_pattern . 0 20% 4320 #https_port 8080 Parent Config: http_port 8080 cache_peer squid1 sibling 8080 0 default originserver hierarchy_stoplist cgi-bin ? acl QUERY urlpath_regex cgi-bin \? cache deny QUERY acl apache rep_header Server ^Apache broken_vary_encoding allow apache cache_mem 100 MB cache_swap_low 90 cache_swap_high 95 access_log /var/log/squid/access.log squid 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 acl US src b.b.b.b acl eng src a.a.a.a http_access allow manager localhost http_access deny manager http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow localhost http_access allow eng http_access allow US http_access deny all http_reply_access allow all icp_access allow all cache_effective_user squid cache_effective_group squid icp_port 0 #always_direct deny all #prefer_direct on coredump_dir /var/spool/squid refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern (cgi-bin|\?) 0 0% 0 refresh_pattern . 0 20% 4320 #https_port 8080 When i browse from a.a.a.a subnet i get the following error after disabling local internet The following error was encountered: Invalid Request Some aspect of the HTTP Request is invalid. Possible problems: Missing or unknown request method Missing URL Missing HTTP Identifier (HTTP/1.0) Request is too large Content-Length missing for POST or PUT requests Illegal character in hostname; underscores are not allowed Your cache administrator is root. -------------------------------------------------------------------------------- Generated Tue, 31 Mar 2009 19:51:19 GMT by squid2 (squid/2.6.STABLE6) and also i see error on squid 2(parent) in access.log as TCP_DENIED/400 1499 GET error:invalid-request - NONE/- text/html Please help me and thanks in advance. -- View this message in context: http://www.nabble.com/Squid-sibling-parent-configuration-Error-tp22814745p22814745.html Sent from the Squid - Users mailing list archive at Nabble.com.