$Id: README,v 1.2 2005/05/17 16:56:29 hno Exp $README file for ip_user_check, an external helper for the Squid external acl scheme.It works by reading a pair composed by an ip address and an usernameon STDIN and matching it against a configuration file.The configuration for the external ACL should be:external_acl_type type-name %SRC %LOGIN /path/to/ip_user_check -f /path/to/config.fileIf the program finds a matching username/ip in the configuration file, it returns `OK', or `ERR' otherwise.The usage for the program is:ip_user_check -f <configuration_file>The configuration file format is as follows:ip_addr[/mask]		user|@group|ALL|NONEWhere ip_addr is a dotted quad format IP address, the maskmust be in dotted quad format too.When the second parameter is prefixed with an @, the program will lookup in the/etc/group entry for the specified username.There are other two directives, `ALL' and `NONE', which mean "any user on this ipaddress may authenticate" or "no user on this ip address may authenticate".TODO- Deny operator, to create `allow all but' rules- Check for a valid user in the OS- Accept decimal format netmasks --Rodrigo Camposrodrigo@geekbunker.org