# Squid [Squid](http://www.squid-cache.org/) is a caching HTTP/HTTPS proxy. This guide will show you how to configure it to allow any user of the group `proxy` to use the proxy server. The configuration file `/etc/squid/squid.conf` ``` auth_param basic program /usr/lib/squid/basic_ldap_auth -b "dc=example,dc=com" -D "uid=admin,ou=people,dc=example,dc=com" -W /etc/squid/ldap_password -f "(&(memberOf=uid=proxy,ou=groups,dc=example,dc=com)(uid=%s))" -H ldap://IP_OF_LLDAP_SERVER:3890 acl localnet src 0.0.0.1-0.255.255.255 # RFC 1122 "this" network (LAN) acl localnet src 10.0.0.0/8 # RFC 1918 local private network (LAN) acl localnet src 100.64.0.0/10 # RFC 6598 shared address space (CGN) acl localnet src 169.254.0.0/16 # RFC 3927 link-local (directly plugged) machines acl localnet src 172.16.0.0/12 # RFC 1918 local private network (LAN) acl localnet src 192.168.0.0/16 # RFC 1918 local private network (LAN) acl localnet src fc00::/7 # RFC 4193 local private network range acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines 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 http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow localhost manager http_access deny manager include /etc/squid/conf.d/*.conf http_access allow localhost acl ldap-auth proxy_auth REQUIRED http_access allow ldap-auth # http_access deny all http_port 3128 coredump_dir /var/spool/squid refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern \/(Packages|Sources)(|\.bz2|\.gz|\.xz)$ 0 0% 0 refresh-ims refresh_pattern \/Release(|\.gpg)$ 0 0% 0 refresh-ims refresh_pattern \/InRelease$ 0 0% 0 refresh-ims refresh_pattern \/(Translation-.*)(|\.bz2|\.gz|\.xz)$ 0 0% 0 refresh-ims refresh_pattern . 0 20% 4320 ``` The password for the binduser is stored in `/etc/squid/ldap_password` e.g. ``` PASSWORD_FOR_BINDUSER ``` After you restart squid with `systemctl restart squid` check it is working with ``` curl -O -L "https://www.redhat.com/index.html" -x "user_name:password@proxy.example.com:3128" ```