Mine

http_port 3128 transparent
visible_hostname pbx.asterisk.local
hierarchy_stoplist cgi-bin ?
acl QUERY urlpath_regex cgi-bin \?
cache deny QUERY
acl apache rep_header Server ^Apache
broken_vary_encoding allow apache
access_log /var/log/squid/access.log squid
hosts_file /etc/hosts
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern .               0       20%     4320
acl messenger url_regex -i gateway.dll
acl msn req_mime_type -i ^application/x-msn-messenger
acl YEREL src 192.168.0.0/24
acl MASUS src 192.168.0.100/255.255.255.255
acl SILBENI src 192.168.0.140/255.255.255.255
acl BT110 src 192.168.0.136/255.255.255.255
acl GSHDSL src 88.248.73.0/29
acl ADSL src 192.168.2.0/24
acl LOCALHOSTS dst 192.168.0.0/24 192.168.2.0/24 88.248.73.0/29
acl whitelist url_regex "/etc/squid/whitelist.acl"
acl blacklist url_regex "/etc/squid/blacklist.acl"
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          # https
acl SSL_ports port 563          # snews
acl SSL_ports port 873          # rsync
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 280         # http-mgmt
acl Safe_ports port 488         # gss-http
acl Safe_ports port 591         # filemaker
acl Safe_ports port 777         # multiling http
acl Safe_ports port 631         # cups
acl Safe_ports port 873         # rsync
acl Safe_ports port 901         # SWAT
acl purge method PURGE
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access allow purge localhost
http_access deny purge
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports

#tcp_outgoing_address 192.168.2.15 YEREL
#tcp_outgoing_address 88.248.73.2 BT110
#tcp_outgoing_address 88.248.73.2 GSHDSL
tcp_outgoing_address 192.168.2.15

http_access allow localhost
http_access allow whitelist
http_access allow MASUS blacklist
http_access deny msn
http_access deny messenger
http_access deny YEREL blacklist
http_access allow YEREL
http_access deny all
http_reply_access allow all
icp_access allow all
always_direct allow all
coredump_dir /var/spool/squid
#never_direct deny LOCALHOSTS
#never_direct allow all