First I am new at working with networks. Most of the IT staff were downsized last year including the administrator. I am a database programmer. I like ubuntu and have an ubuntu database server. I am trying to use an ubuntu server as a squid proxy so that Windows workstations on a manufacturing floor can only go to company web sites on a whitelist. I am manually configuring the workstations to go to this proxy server. Squid3 loads okay without error messages. I know it is seeing the whitelist.txt file because I get an error if the file is not present. However SQUID will not allow any addresses to load even those in the white list. Below is my squid.conf and my whitelist.txt file. The message in the Squid log is below. The message on the browser screen confirms that squid is blocking the address. I tried the same software and configuration on ubuntu 8.04 and had the same issues. Thank you. 1274724540.610 193 192.168.100.9 TCP_DENIED/403 2710 GET http://www.unicef.org/ - NONE/- text/html #whitelist.txt .gov .sheepguardingllama.com .org .chromalloy.com #squid.conf #Recommended minimum configuration: acl manager proto cache_object acl localhost src 127.0.0.1/32 acl to_localhost dst 127.0.0.0/8 acl localnet src 192.168.100.0/255.255.255.0, 192.168.101.0/255.255.255.0 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 deny to_localhost icp_access deny all htcp_access deny all http_port 3128 hierarchy_stoplist cgi-bin ? access_log /var/log/squid3/access.log squid #We recommend you to use the following two lines. acl QUERY urlpath_regex cgi-bin \? cache deny QUERY #Suggested default: refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern . 0 20% 4320 # Leave coredumps in the first cache dir coredump_dir /var/spool/squid3 acl whitelist dstdomain "/etc/squid3/whitelist.txt" http_access deny !localnet http_access deny !whitelist http_access deny all