Hi all, I have set up a Squid Proxy as child proxy in a LAN. It should forward all http requests (which are not directed to the LAN => this is nonrelevant for my problem) to a proxy outside the LAN. This proxy belongs a third party provider, it is a "black box"for me, i have no access to and no information about this machine. The only thing I know about this machine is the ip address and the port on that it waits for http requests.
My problem is that the child proxy not just forwards http-requests to the parent, it first makes dns-requests which are dropped by the firewall. So I built squid with the option --disable-internal-dns, tried "never_direct allow all"in squid.conf and started squid with 'squid -NCDd1', but this just loads a new error page "Unable to forward this request at this time. ALL configured parent caches are currently unreachable". In squid.conf I added the parent proxy with its ip-address: http_port 143.113.4.1:3128 icp_port 0 cache_peer 10.19.10.1 parent 80 0 hierarchy_stoplist cgi-bin ? acl QUERY urlpath_regex cgi-bin \? no_cache deny QUERY cache_dir ufs /usr/local/squid/var/cache 100 16 256 auth_param basic realm Squid proxy-caching web server auth_param basic credentialsttl 2 hours refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern . 0 20% 4320 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 443 563 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 563 # https, snews 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 deny CONNECT !SSL_ports acl vlan4 src 143.113.4.0/24 acl tcn src 143.1.0.0/16 http_access allow vlan4 http_access allow tcn http_access deny all http_reply_access allow all icp_access deny all never_direct allow all coredump_dir /usr/local/squid/var/cache Is there anything wrong with this config ? (I am running squid 2.5stable6) Why can be the reason that the parent can't be reached from the child ? When I open a web broser on this machine I can connect to the parent, so shouldn't it be possible for the proxy on this machine as well ? Any advice is appreciated. Jens Bauer
